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ATNF Pulsar Catalogue v1.57: Documentation

G. Hobbs, R. N. Manchester and L. Toomey
CSIRO Astronomy and Space Science, Australia Telescope National Facility, PO Box 76, Epping, NSW 1710, Australia

1. Introduction

Background to the original (2005) version of the ATNF Pulsar Catalogue

Since publication of the "Catalog of 558 Pulsars" by J.H. Taylor, R.N. Manchester & A.G. Lyne in 1993 (ApJ Suppl. Ser., 88, 529-568), the number of known pulsars has increased considerably. Although various researchers have maintained updated catalogues since then, in general, these have neither been complete, nor very accessible.  One of the more complete databases has been maintained principally by ourselves and colleagues at the University of Manchester, Jodrell Bank Observatory. This database, based on one originally developed at the University of Massachusetts (Manchester & Taylor 1972, Astrophys. Lett., 10, 67-70), is a simple keyword, parameter ascii file containing references to the source of the data. We have used this as a basis for the present catalogue. With the invaluable help of NASA's  Astrophysics Data System,  we have done an exhaustive search of the pulsar literature, at least back to 1993 to (hopefully) find all papers announcing the discovery of pulsars or giving improved parameters for them. Data from these papers has been entered into the catalogue database.

General description of the Catalogue

The catalogue includes all published rotation-powered pulsars, including those detected only at high energies. It also includes Anomalous X-ray Pulsars (AXPs) and Soft Gamma-ray Repeaters (SGRs) for which coherent pulsations have been detected. However, it excludes accretion-powered pulsars such as Her X-1 and the X-ray millisecond pulsars, for example,  SAX J1808.4-3658 (Wijnands & van der Klis, Nature, 394, 344, 1998).

The catalogue can be accessed in a number of different ways.  The simplest is from a web interface ( ) allowing listing of the most commonly used pulsar parameters, their uncertainties and reference information. Several options for tabular output format are provided. Currently, a total of 69 predefined parameters are available, with a further 105 in "Expert" mode: see the parameter list in Appendix A of this help file. A facility is provided for plotting of parameter distributions as two-dimensional plots. Zoom facilities and interactive identication of plotted points are provided. Custom parameters can be defined by combining parameters in expressions using mathematical operators and functions and these can be either listed or plotted.  Finally,  the sample of pulsars listed or plotted can be limited by logical conditions on parameters, pulsar name (including wild-card names) or distance from a nominated position. These facilities are described in more detail below and links are provided within the web interface to relevant documentation.

After creating a table or plot, accessing the help pages or reference list, use your browser Back funtion to return to the main catalogue page.

For professional astronomers, a more detailed "Expert" web interface is available allowing access to an additional 98 parameters of specialist interest. The catalogue can also be accessed using a command-line interface on unix or linux systems. A tar file containing the database and source files for the command-line program is available using the web interface "Download" link.

A table of the basic parameters for known pulsar glitches is also available from the web interface.

The purpose of this documentation is to provide a description of all the features available.  A more basic tutorial is available to guide the user through the web interface (  We encourage you to send us as much feedback (both positive and negative) as possible about the catalogue, interfaces and documentation.

PLEASE NOTE: If you make use of the ATNF Pulsar Catalogue in a publication, we request that you acknowledge the source of the information by referencing the paper: Manchester, R. N., Hobbs, G. B., Teoh, A. & Hobbs, M., Astron. J., 129, 1993-2006 (2005) (astro-ph/0412641), which gives a full description of the catalogue, and by quoting the web address
Where practicable, please list the original references for data used. Reference lists for data in a given table, both in plain text and in .bbl format, are available from links at the bottom of the table page.


2. The WEB interface

The public web interface is situated at  The following sections describe the web interface in detail.

2.1 Display Parameters

2.1.1 Predefined Variables

Pulsar parameters are selected by clicking on the box to the left of the parameter label.  In the following example, the user has selected to display the pulsars' names and proper motions:

Clicking on the pulsar name gives links to other databases which may contain information about this pulsar. Clicking on a parameter name brings up the list of parameter descriptions (Appendix A) in which the selected parameter is highlighted in red.

2.1.2 Custom Variables

Custom variables are functions of the predefined variables. Up to four custom variables (C1, C2, C3 and C4) may be defined.  The definition is provided in the text box.  Valid expressions for this definition are given in Section 3  of this documentation.  This custom variable can subsequently be used in  sorting, conditions or plotted output.  If the check-box to the left of the custom variable label is checked then this variable will be listed in any tabular output (in exponential form to 6 decimal places).  For example, a new variable (C1) can be defined to equal the square root of the period multiplied by its derivative -- enter into one of the C1, C2, C3 or C4 text boxes sqrt(p0*p1) and click on the check-box to the left of the text:

2.2 Sorting

By default the results will be sorted according to the pulsars' J2000 names in ascending alphabetical order.  However, sorting is possible on any parameter by typing the parameter label in the 'sort on field' text box and selecting whether the sort should be in ascending (default) or descending order. Sorting may be either numerical, e.g. for pulse period, or alphabetical, e.g. for survey. If the user selects a parameter for sorting that has not been measured for some pulsars (for example, not all pulsars have a measured period derivative) then those pulsars with no measurement will appear at the top (or bottom for descending order) of the sorted table; the remaining pulsars will be sorted correctly.   For example, the following would be used to produce a table sorted in descending order on dispersion measure:

2.3 Logical Conditions

Often the user will require results from only a selection of pulsars in the catalogue.  Filtering can be carried out on the pulsars' parameters (described in this section), by the pulsars'  names (Section 2.4) or by their  position (Section 2.5). The conditional expression can be any  valid expression  with the following conditional statements:
== Equality != Inequality test
< Less than ! Logical NOT
<= Less than or equal to && Logical AND
> Greater than || Logical OR
>= Greater than or equal to

along with the following functions:

  • exist(par), which returns whether the pulsar parameter (par) is recorded in the catalogue.  For example to list all binary pulsars with measured proper motions use:
  • exist(pmtot) && exist(pb)

  • error(par) can be used to obtain the uncertainty on a parameter. For example, in order to obtain all pulsars with proper motion measurements in right ascension with uncertainties less than  20 mas/yr, use:
  • exist(pmra) && error(pmra) < 20

  • type(str) allows the type of pulsar to be selected.  Currently avaiable types are listed in Appendix B.

  • For example, to select all radio pulsars:


    or to select all pulsars which do not emit at radio wavelengths:


  • bincomp(str) allows the type of binary companion to be selected.  Currently avaiable types are listed in Appendix C.

  • assoc(str) is true if 'str' occurs within the value of the parameter assoc. for example:
  • assoc(snr) will select all pulsars with SNR associations.

  • survey(sur) is true if the pulsar was detected in a survey containing the string 'sur'. If the 'Exact match' button is set, then only the survey 'sur' is selected. The current list of surveys is given in Section 4

  • discovery(sur) is true is the pulsar was discovered in a survey containing the string 'sur'. If the 'Exact match' button is set, then only the survey 'sur' is selected.

Coordinates can be entered as follows.  The parameters, rajd, decjd, gl, gb, elat and elong are all returned in degrees and can be used in normal algebraic expressions:gl > 50 && gl < 100 will return all pulsars with Galactic longitudes between 50 and 100 degrees.  However, it often desirable to obtain all pulsars in a longitude range which encompasses the origin, for example, Galactic longitudes greater than 320 degrees and less than 50 degrees (i.e. from 320 to 410 degrees).  This can be obtained using the range() function:


will return pulsars within the required range.  The coordinate type can be raj, rajd, gl or elong.

It is possible to supply right ascensions in hours, minutes and seconds and declinations in degrees, minutes and seconds as follows:

raj > h19:33 && decj < d-30:00

(note, the use of an 'h' to indicate hours,minutes and seconds and 'd' for degrees).  This can also be used within the range function:


This format requires a colon (i.e. hours/degrees and minutes must be entered; the use of seconds is optional).  The functions hms() and dms() may be used to convert to degrees. For example,

raj > hms(19:33) && decj < dms(-30:25)

2.4 Pulsar Names

Prior to 1993, pulsars were given names according to their position in the B1950 coordinate system. After that date, most pulsars have been given names based on their position in the J2000 coordinate system. These are identified by a B or J preceding the hours and minutes of right ascension; B names have just the sign and degrees of declination, J names generally have the minutes of declination as well. Ambiguities are resolved by adding a further digit corresponding to the fractional minute of declination (rounded toward zero). B names assigned on discovery have been retained as the pulsar 'name'. Pulsars given a J name on discovery have no B name.

Pulsars associated with a globular cluster are identified by a capital letter following the name. Following "Z", "aa", "ab", etc. are used (as for Terzan 5). By convention, the coordinates in the name of globular-cluster pulsars are those of the cluster centre and not those of the pulsar itself. This ensures correct ordering of globular-cluster pulsars in lists. Other associated pulsars, e.g., the components of the Double Pulsar, are also identified by letters.

It is possible to select pulsars that have been individually entered into the "Pulsar names" box.  For example:

would produce a table including only the pulsars B0329+54, B1933+16 and J2346-0609.  The pulsar names can be separated by a new line, comma, tab character or spaces.  It is advisable to include the 'B' or 'J' in front of the pulsar name;  if not both the pulsar B1950 and J2000 names will be searched for a match to the entered name.  The name may include the wildcard characters '*' and '?'.  For example, b1933+1? will match PSRs B1933+16, B1933+17 and B1933+15 whereas j004*+* will match PSRs J0040+5716 and J0048+3412.

2.5 Selecting pulsars within a boundary

It is also possible to select pulsars that lie within a certain region of the sky.  Such a 'search' radius can be defined as a pulsar position (pulsar name), in equatorial coordinates (, or  both in degrees) or in Galactic coordinates (degrees).  The search radius around this coordinate is specified is specified in degrees.  The Haversine formula (see R. W. Sinnott, "Virtues of the Haversine", Sky and Telescope, vol. 68, no. 2, 1984, p159) used in determining the distance of the pulsar from the specified coordinate is accurate even at high latitudes.  It is, however, limited when the given coordinate and a pulsar position are close to being antipodal.   The following example defines the region of the sky to be included to be within one degree of right ascension 19:33 and declination 16:00

Equatorial coordinates can be entered using white spaces or colons, for example "19:33:00" is treated in the same manner as "19 33 00", "19 33" and "19:33".  It is sometimes necessary to know the angular distance between each pulsar and the central coordinate.  Selecting 'Show pulsar's distance from centre of this region' will provide a new column in the tabular output giving this angular distance in degrees.

2.6 Pulsar Ephemerides

The user may wish to obtain all (or a large amount of) the information stored for a few pulsars.  This is possible, but not practical, using the standard table forms.  It is, therefore, possible to type the names of the pulsars of interest in the 'Pulsar names' area and then to select "Get Ephemeris".  Three output formats are available. Short format provides all the pulsar parameters stored in the catalogue that are understood by the  TEMPO [external link] pulsar timing package (most of the observed astrometric and rotational parameters, but no derived parameters).   Long format provides all the information obtainable from the data stored in the catalogue (all observed, survey and derived parameters) and the Selected format uses the parameter selections made in the 'predefined variables' section to define which parameters to display. Examples are shown below.
Short format

JNAME           J1935+1616 
RAJ             19:35:47.857             1.000e-03
DECJ            +16:16:40.60             2.000e-02
PEPOCH          42264.5 
DM              158.53                   5.000e-02
PMRA            2                        3.000e+00
PMDEC           -25                      5.000e+00
POSEPOCH        40213 
F0              2.78756329984            6.216e-11
F1              -4.66506e-14             3.885e-19

Long format

JNAME           J1935+1616 
RAJ             19:35:47.857             1.000e-03
DECJ            +16:16:40.60             2.000e-02
PEPOCH          42264.5 
P0              0.358736248270           8.000e-12
P1              6.00354e-15              5.000e-05
DM              158.53                   5.000e-02
RM              -1.9                     4.000e-01
PMRA            2                        3.000e+00
PMDEC           -25                      5.000e+00
POSEPOCH        40213 
S400            242                      2.200e+01
S1400           42                       6.000e+00
W10             17.7 
W50             9.0 
F0              2.78756329984            6.216e-11
F1              -4.66506e-14             3.885e-19
AGE             1.0 
BSURF           1.49 
EDOT            5133.83 
RAJD            293.9494 
DECJD           16.2779 
Gl              52.44 
Gb              -2.09 
R_LUM           15218.15 
R_LUM14         2641.17 
DIST_DM         7.93 
TAU_SC          1.51e-05 
SURVEY          jb1,ar1,mol2,gb3,ar2,ar3 
DM*sin(b)       -5.79 
OSURVEY         0000002616 
PMTOT           25                       7.800e+00
VTRANS          939.90                   1.000e-01
P1_I            5.99922 
AGE_I           1.0 
BSURF_I         1.48 
EDOT_I          5130.13 
EDOTD2          682.17 
XX              6.28 
YY              3.67 
ZZ              -0.29 
DIST            7.93 

2.7 Output

Two different types of output are available: a tabular form and a graphical display.  These are described in the following two sections.

2.7.1 Tabular Output

The final table can take seven different forms: 'short without errors', 'short csv without errors', 'short with errors', 'long with last digit errors', 'long with errors', 'long csv with errors' or 'publication quality', with 'long with last digit errors' as default. The short form is used to provide a condensed summary of the pulsar parameters; periods are given to six decimal places, dispersion measures to two decimal places etc.  It is expected that this format will be used for producing tables that can be entered directly into, for instance, plotting packages where the full measured precision is not required.  The short csv without errors gives the same data in csv format, with the separation character being a semicolon.  The short format with errors provides uncertainties on the parameters that have corresponding errors.  The actual value of the parameter is given to the same number of decimal places as the "short" format.  The uncertainty is given in an exponent format to one decimal place. The long formats provides the parameters to their measured precision, their uncertainties and references.  From the web interface it is possible to click on a reference label to obtain the full bibliographic reference (see Section 5). The uncertainty is given as an integer corresponding to the uncertainty in the last significant figure in the value.  For example, "1.2     2" can be written as "1.2 +/- 0.2".  The 'publication quality' format gives the parameters to full precision with corresponding uncertainties given in parenthesis.  For example, 3.4(5) could also have been written as 3.4 +/- 0.5.  The bibliographic references are included as a separate column on the right hand side of the table.  The example below shows the table produced with the different output formats for the three pulsars with periods less than two milliseconds:
short with errors:
long with last digit errors:

Selecting 'No header' will produce a table with no header information at the top and with no spaces between groups of five pulsars.  If a parameter has been selected, but does not exist in the catalogue (for example, not all pulsars have had their proper motions measured) then the table will contain a 'null value'.  By default, this null value is set to a '*'.  However, the user may enter any string into the Null Value text box to modify this output.  For example, the user could enter: "-999.999" or "no value".

Tabular output may be copied to a local disk using the browser 'Save As' function with Text format. Netscape provides a method of bypassing the screen display: pressing Shift and the Table button together will copy the output directly to the local disk. Alternatively, Select, Copy and Paste functions may be used. Graphical output may be copied to a local disk using a screen capture program such as xv.

2.7.2 Graphical Output

It is possible to display functions of the pulsar parameters as a graph. For a normal (x-y) graph, the values to plot are defined as regular expressions (see examples in  Section 3) and the axes of the graph can be displayed linearly or logarithmically. The expressions may contain custom-defined variables.  In the following example the user is plotting rotational periods against period derivatives on a logarithmic scale,

which gives the following output (after clicking on  at the bottom, right of the main page):

Binary pulsars are indicated in green, high energy pulsars in red and the remainder in blue. It is possible to zoom in by left-clicking and dragging the cursor to select a region. Plots can be downloaded by clicking on the menu at top right of the plot window.

2.8 A Few Examples

To produce a list of the names and Galactic coordinates of all the known pulsars with periods greater than two seconds and distances greater than 3 kpc:
  1. Click on the box to the left of 'Name', 'GL' and 'GB' under the 'Predefined Variables' heading at the top of the web interface
  2. In the 'Condition' box, type: p0 > 2 && dist > 3
  3. Move to the bottom of the page and click on 
To plot a period-period derivative diagram for all the known pulsars:
  1. Move to the bottom of the web interface and enter 'p0' in the 'X-Axis' box underneath the heading 'Plotted Output'.  Change 'linear' to 'log' to plot the graph with logarithmic axes.
  2. Enter 'p1' in the 'Y-Axis' box and change 'linear' to 'log'.
  3. Click on .
To list all known pulsars with declinations greater than -30 degrees and with measured flux densities at 400 MHz
  1. Under the 'Predefined Variables' heading, select 'Name', 'RAJ', 'DECJ' and 'S400'.
  2. In the 'Condition' box type: decjd > -30 && exist(s400)

  3. Click on the  icon at the bottom of the page.

3. Valid Expressions

The  evaluate [external link]  libraries have been implemented and updated to allow the user to define new variables that are functions of the pulsar parameters (custom variables), to form logical expressions to define the pulsar sample and to define parameters for plotting.  The expressions can contain the following operators:
+ Addition
- Subtraction
* Multiplication
/ Division
** Raise to the power
= assignment
and the following functions:
acos inverse cosine sin sine of angle in radians
asin inverse sine sind sine of angle in degrees
atan inverse tangent sinh hyperbolic sine
atan2 inverse tangent sqr square
cos cosine of angle in radians sqrt square root
cosd cosine of angle in degrees tan tan of angle in radians
cosh hyperbolic cosine tand tan of angle in degrees
exp exponential tanh hyperbolic tangent
ln log (base 2) fabs absolute value
log log (base 10) fmod modulus (two arguments)
log10 log(base 10)

Each function (except fmod) takes only one variable or expression which should be typed immediately after the function name and enclosed in parentheses.

4. The Surveys

The table below lists the major pulsar surveys. The category 'misc' lists pulsars discovered in other (more limited) searches.
Survey label
Reference Keys
Nr detected
Nr discovered
ar1 Arecibo Survey 1 ht74,ht75a,ht75b 4 49 40
ar2 Arecibo Survey 2 bkh+82,srs+86,sstd86 400 24 6
ar3 Arecibo Survey 3 fst88,nft93,nft95 2000 85 24
ar4 Arecibo Survey 4 wol90a,wol91a,cnt93,fwc93,ntf93,tdk+93,cam95a,fcwa95,
20000 138 91
palfa Arecibo Multibeam Survey cfl+06,lsf+06,crl+08,hng+08,dcm+09,kac+10,kla+11,dfc+12,
2000000 246 115
ar327 Arecibo 327 MHz Drift-Scan Survey dsm+13,dsm+16 1000000000 46 44
FermiBlind Fermi Gamma-ray Observatory blind survey aaa+09c,sdz+10,sbd+11,rkp+11,awd+12,pga+12,pga+12a,pgf+12,
4000000 56 56
FermiAssoc Searches of unidentified Fermi gamma-ray sources rrc+11,kjr+11,hrm+11,ckr+12,gfc+12,kcj+12,rap+12,bgc+13,
20000000 52 52
gb1 Green Bank Northern Hemisphere survey cls68,cp68,sr68,htg+68,lan69,fss73,dth78,dbtb82 20 50 31
gb2 Princeton-NRAO survey dtws85 40 82 34
gb3 Green Bank short-period survey stwd85 200 159 20
gb4 Green Bank fast pulsar survey nst96,snt97 10000 83 5
gb350 Green Bank 350 MHz drift-scan survey hrk+08,blr+13,lbr+13,rsm+13,rsa+14,kkl+15,srm+15 40000000 72 71
gbncc Green Bank North Celestial Cap survey slr+14,kkl+15 2000000000 132 75
ghrss GMRT High Resolution Southern Sky Survey bcm+15 4000000000 32 10
htru_eff High time resolution survey - Effelsberg bck+13 400000000 15 13
htru_pks High time resolution survey - Parkes kjv+10,lbb+10,kea10,kle+10,bbk+11,bbb+11a,kjb+12,bbb+12,
10000000 996 171
jb1 Jodrell A survey dl70,dlp70,dls72,dls73 2 51 37
jb2 Jodrell B survey lh81,mdt85,cl86,cjlm87,clj+92 100 62 42
mol1 1st Molonglo survey lvm68,lvw68,tv68,vlw69,wvl69,lvw69a,lvw69b,vl70,vl72 1 34 31
mol2 2nd Molonglo Survey mlt+78 10 224 154
pks1 Parkes 20-cm survey jlm+92 1000 100 46
pks70 Parkes Southern Sky survey jlh+93,bhl+94,tnj+94,lnl+95,llb+96,mld+96,sbl+96,bjb+97,lml+98 4000 298 101
pkshl Parkes high-latitude multibeam pulsar survey bdp+03,lbk+04,bjd+06 1000000 41 18
pksgc Parkes globular cluster survey mld+90,mlr+91,rlm+95,clf+00,dlm+01,rgh+01,dpf+02,pdm+03,
200000 33 33
pksmb Parkes multibeam pulsar survey ckl+00,klm+00a,lcm+00,mlc+01,cbm+01,clm+01,dkm+01,sml+01,
40000 1122 833
pkssw Parkes-Swinburne multibeam survey eb01,eb01a,ebvb01,jbv+03,jac05,jbo+07,jbo+09,bb10 100000 244 109
pkspa Parkes Perseus Arm multibeam survey bkl+13 100000000 15 14
pksngp Parkes deep northern Galactic Plane survey lcm13 200000000 18 16
pks_superb Parkes survey for pulsars and extragalactic radio bursts kbj+17 10000000000 10 10
misc - 400000 - 324

5. References

References are given for all observed parameters in 'long' and 'publication' output formats , including the pulsar discovery (associated with the pulsar Name). In tables, a bibliographic key is given with each observed parameter. Clicking on this key will bring up the full bibliographic details for that reference.

6. Distances

The pulsar distance (Dist) is a derived parameter as it depends on other catalogue parameters and is not itself a catalogue entry. The default value is that derived from the dispersion measure (DM) using the YMW16 model (Yao, Manchester & Wang, 2017) for the Galactic distribution of free electrons, i.e., Dist = Dist_DM. However, various other estimates can take precedence. First precedence is given to an independent distance estimate, Dist_A, based on an association with another object (e.g., globular cluster, supernova remnant, Large or Small Magellanic Cloud), measurements of absorption by neutral hydrogen combined with a model for differential rotation of the Galaxy or another estimate believed to be more reliable than the DM-derived distance. Next in priority order is a measured annual parallax (PX) with a value greater than three times the quoted uncertainty: Dist = 1/PX. If there are only distance limits, Dist_AMN and Dist_AMX, then Dist is set equal to the DM-derived distance if it lies between these limits or to the nearest limit if it doesn't. Dist_A and the limits Dist_AMN and Dist_AMX are available in Expert mode. Dist_DM1, a distance estimate based on the NE2001 Galactic electron-density model (Cordes & Lazio 2002) and the associated Dist1 (taking into account the above precedences) are also available in Expert mode.

The Galactocentric coordinate system (XX, YY, ZZ) is right-handed with the Sun at (0.0, 8.5 kpc, 0.0) and the ZZ axis directed toward the north Galactic pole.

7. Feedback

Any comments, suggestions or criticisms can be submitted using a feedback form on the web interface here. The 'Name' and 'Email' boxes are not compulsory, but should be included if you require a reply to your comment.

8. Upgrading the Catalogue

The catalogue database will be upgraded both in response to user feedback and to include data from recent publications.


9. Downloading the Catalogue

The current catalogue database and the PSRCAT source code may be downloaded by clicking on the "Download" link at the top of the Catalogue webpage.

PSRCAT is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. PSRCAT is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

PSRCAT makes use of "evaluateExpression: A Simple Expression Evaluator". Copyright (c) 1996 - 1999 Parsifal Software, All Rights Reserved.


Many people have contributed to the maintenance and upgrading of the database used for the Taylor, Manchester & Lyne (1993) paper. We particularly thank Andrew Lyne of the University of Manchester, Jodrell Bank Observatory, David Nice of Princeton University and Russell Edwards, then at Swinburne University of Technology. We also acknowledge the efforts of Warwick University students Adam Goode and Steven Thomas who compiled and checked a recent version of the database.

The web interface was designed and constructed by Albert Teoh, during his tenure as a Summer Vacation Scholar at the ATNF, 2002/2003.

This work has made extensive use of NASA's Astrophysics Data System and the Google  search engine. The plot facility makes use of the Highcharts plotting package.

The original database was compiled with the invaluable assistance of Maryam Hobbs during her term as a Research Assistant in the ATNF Parkes Pulsar Timing Array (PPTA) group (10/2003 - 4/2005). Since then this work has been continued by Diana Londish (8/2005 - 10/2006), Lucyna Kedziora-Chudczer (11/2006 - 6/2009), Ankur Chaudhary (9/2009 - 9/2012) and Lawrence Toomey (12/2012 - present).

We thank W. Becker for a pre-publication copy of "X-ray Emission from Pulsars and Neutron Stars", in "Neutron Stars and Pulsars", Astrophys. Space Sci. Library 357 (2008), Thomas Tauris and Paulo Freire for assistance with compiling the list of binary companion types and relevant references (see Tauris, Langer and Kramer, 2012, MNRAS, 425, 1601) and Meng Yu for updates to the glitch table. We acknowledge the use of Paulo Freire's website Pulsars in Globular Clusters and the McGill AXP/SGR Online Catalog which have provided valuable cross-checks and, in some cases, otherwise unpublished data. Finally, we thank our colleagues for their many comments and suggestions which have helped to improve both the database and the means of accessing it.

Appendix A: The Pulsar Parameters

Name:        Pulsar name.  The B name if exists, otherwise the J name.
JName:       Pulsar name based on J2000 coordinates
RAJ:         Right ascension (J2000) (hh:mm:ss.s) 
DecJ:        Declination (J2000) (+dd:mm:ss) 
PMRA:        Proper motion in the right ascension direction (mas/yr) 
PMDec:       Proper motion in declination (mas/yr) 
PX:          Annual parallax (mas) 
PosEpoch:    Epoch of position, defaults to PEpoch (MJD) 
ELong:       Ecliptic longitude (degrees)
ELat:        Ecliptic latitude (degrees) 
PMElong:     Proper motion in the ecliptic longitude direction (mas/yr) 
PMElat:      Proper motion in ecliptic latitude (mas/yr) 
GL:          Galactic longitude (degrees) 
GB:          Galactic latitude (degrees) 
RAJD:        Right ascension (J2000) (degrees)
DecJD:       Declination (J2000) (degrees)

Bname:       Pulsar Besselian name
PML: Proper motion in Galactic longitude (mas/yr)
PMB: Proper motion in Galactic latitude (mas/yr)

Timing solution and profile parameters:

P0:          Barycentric period of the pulsar (s)
P1:          Time derivative of barcycentric period (dimensionless)
F0:          Barycentric rotation frequency (Hz)
F1:          Time derivative of barycentric rotation frequency (s-2)
F2:          Second time derivative of barycentric rotation frequency (s-3)
F3:          Third time derivative of barycentric rotation frequency (s-4)
PEpoch:      Epoch of period or frequency (MJD)
DM:          Dispersion measure (cm-3 pc)
DM1:         First time derivative of dispersion measure (cm-3 pc yr-1)
RM:          Rotation measure (rad m-2)
W50:         Width of pulse at 50% of peak (ms). Note, pulse widths are a function of both observing frequency and
             observational time resolution,so quoted widths are indicative only. Refer to the original reference for details.
W10:         Width of pulse at 10% (ms). Note the comments above for W50.
Units:       Timescale for period/frequency and epoch data: TCB or TDB.
             See Hobbs, Edwards & Manchester (2006) for a discussion of the relationship between TCB and TDB.
Tau_sc:      Temporal broadening of pulses at 1 GHz due to interestellar scattering (s)
S400:        Mean flux density at 400 MHz (mJy)
S1400:       Mean flux density at 1400 MHz (mJy)
S2000:       Mean flux density at 2000 MHz (mJy)

CLK:         Reference clock used for timing solution
EPHEM: Solar-system ephemeris used for timing solution
F4: Fourth time derivative of barycentric rotation frequency (s^-5)
F5: Fifth time derivative of barycentric rotation frequency (s^-6)
F6: Sixth time derivative of barycentric rotation frequency (s^-7)
F7: Seventh time derivative of barycentric rotation frequency (s^-8)
F8: Eighth time derivative of barycentric rotation frequency (s^-9)
F9: Ninth time derivative of barycentric rotation frequency (s^-10)
DMEpoch: Reference epoch for DM, defaults to PEpoch (MJD)
DM2: Second time derivative of dispersion measure (cm-3pc yr-2)
DM3: Third time derivative of dispersion measure (cm-3pc yr-3)
DM4: Fourth time derivative of dispersion measure (cm-3pc yr-4)
DM5: Fifth time derivative of dispersion measure (cm-3pc yr-5)
DM6: Sixth time derivative of dispersion measure (cm-3pc yr-6)
DM7: Seventh time derivative of dispersion measure (cm-3pc yr-7)
DM8: Eighth time derivative of dispersion measure (cm-3pc yr-8)
DM9: Ninth time derivative of dispersion measure (cm-3pc yr-9)
S30: Flux at 30 MHz (mJy)
S40: Flux at 40 MHz (mJy)
S50: Flux at 50 MHz (mJy)
S60: Flux at 60 MHz (mJy)
S80: Flux at 80 MHz (mJy)
S100: Flux at 100 MHz (mJy)
S150: Flux at 150 MHz (mJy)
S200: Flux at 200 MHz (mJy)
S300: Flux at 300 MHz (mJy)
S600: Flux at 600 MHz (mJy)
S700: Flux at 700 MHz (mJy)
S800: Flux at 800 MHz (mJy)
S900: Flux at 900 MHz (mJy)
S1600: Flux at 1600 MHz (mJy)
S3000: Flux at 3000 MHz (mJy)
S4000: Flux at 4000 MHz (mJy)
S6000: Flux at 6000 MHz (mJy)
S8000: Flux at 8000 MHz (mJy)
S10G: Flux at 10 GHz (mJy)
S20G: Flux at 20 GHz (mJy)
S50G: Flux at 50 GHz (mJy)
S100G: Flux at 100 GHz (mJy)
S150G: Flux at 150 GHz (mJy)
SPINDX: Radio spectral index

Binary system parameters:

Binary:      Binary model (usually one of several recognised by the pulsar timing programs TEMPO or TEMPO2).
             Modified versions of standard models are often used - refer to the source paper for details of the binary model used.  
T0:          Epoch of periastron (MJD)
PB:          Binary period of pulsar (days)
A1:          Projected semi-major axis of orbit (lt s)
OM:          Longitude of periastron (degrees)
ECC:         Eccentricity
TASC:        Epoch of ascending node(MJD) - ELL1 binary model
EPS1:        ECC x sin(OM) - ELL1 binary model
EPS2:        ECC x cos(OM) - ELL1 binary model
MinMass:     Minimum companion mass assuming i=90 degrees and neutron star mass is 1.35 Mo
MedMass:     Median companion mass assuming i=60 degrees
BinComp:     Companion type

FB0:         Orbital frequency (Hz) 
FB1: 1st time derivative of orbital frequency (Hz s^-1)
FB2: 2nd time derivative of orbital frequency (Hz s^-2)
OMDOT: 1st time derivative of periastron longitude (periastron advance) (deg yr^-1)
OM2DOT: 2nd time derivative of periastron longitude (deg yr^-2)
A1DOT: 1st time derivative of projected semi-major axis (lt-s s^-1)
A12DOT: 2nd time derivative of projected semi-major axis (lt-s s^-2)
ECCDOT: 1st time derivative of eccentricity (s^-1)
ECC2DOT: 2nd time derivative of eccentricity (s^-2)
PBDOT: 1st time derivative of binary period (dimensionless)
GAMMA: Post-Keplerian time-dilation term (s)
T0_2: Epoch of periastron [2nd orbit (where innermost orbit is 1st)] (MJD)
PB_2: Binary period of pulsar [2nd orbit] (days)
A1_2: Projected semi-major axis of orbit [2nd orbit] (s)
OM_2: Longitude of periastron [2nd orbit] (deg)
ECC_2: Eccentricity [2nd orbit]
OMDOT_2: Periastron advance [2nd orbit] (deg/yr)
PBDOT_2: 1st time derivative of binary period [2nd orbit]
EPS1_2: ECC_2 x sin(OM_2) [2nd orbit]
EPS2_2: ECC_2 x cos(OM_2) [2nd orbit]
TASC_2: Epoch of ascending node (MJD) [2nd orbit]
T0_3: Epoch of periastron [3rd orbit] (MJD)
PB_3: Binary period of pulsar [3rd orbit] (days)
A1_3: Projected semi-major axis of orbit [3rd orbit] (s)
OM_3: Longitude of periastron [3rd orbit] (deg)
ECC_3: Eccentricity [3rd orbit]
OMDOT_3: Periastron advance [3rd orbit] (deg/yr)
PBDOT_3: 1st time derivative of binary period [3rd orbit]
PPNGAMMA: PPN parameter gamma (s)
SINI: Sine of inclination angle
SINI_2: Sine of inclination angle [2nd orbit]
SINI_3: Sine of inclination angle [3rd orbit]
XPBDOT: Rate of change of orbital period minus GR prediction
KOM: Long. on sky of asc. node (N toward E) from ann. orbital parallax (deg)
KIN: Orbit inclination from annual orbital parallax (deg)
M2: Companion mass (solar masses)
M2_2: Companion mass [2nd orbit] (solar masses)
M2_3: Companion mass [3rd orbit] (solar masses)
MASS_Q: Mass ratio for binary: M1/M2
MASS_Q_2: Mass ratio for 2nd binary companion: M1/M2_2
OM_ASC: Longitude on sky of ascending node (from N toward E) (deg)
OM_ASC_2: Longitude on sky of ascending node (2nd orbit) (deg)
DTHETA: Relativistic deformation of the orbit
XOMDOT: Rate of periastron advance minus GR prediction (deg/yr)
H3: Amplitude of 3rd Shapiro-delay harmonic (s).              See Freire & Wex (2010) for a discussion of H3, H4 and STIG and how these relate to the Shapiro delay              parameters r (or M2) and s (or SINI)
H4: Amplitude of 4th Shapiro-delay harmonic (s)
STIG: Ratio of successive Shapiro-delay harmonics (e.g., H4/H3)
MASSFN: The pulsar mass function (solar mass)
UPRMASS: 90% confidence upper companion mass limit, i=26deg (solar mass)
MINOMDOT: Minimum omega dot, assuming sin i = 1 and M_ns = 1.4Mo (deg/yr)

Distance parameters:

Dist:        Best estimate of the pulsar distance using the YMW16 DM-based distance as default (kpc)
Dist_DM:     Distance based on the YMW16 electron density model. 
             In 'LONG' or 'PUBLICATION QUALITY' modes, lower limits from the distance model are preceded by a '+' sign.
DMsinb:      DM x sin(b) (cm-3 pc)
ZZ:          Distance from the Galactic plane, based on Dist
XX:          X-Distance in X-Y-Z Galactic coordinate system (kpc)
YY:          Y-Distance in X-Y-Z Galactic coordinate system (kpc)
Dist_DM1:    Distance based on NE2001 model (kpc)
Dist1: Best estimate of the pulsar distance using the NE2001 DM-based distance as default (kpc)
Dist_AMN: Lower limit on independent distance estimate (kpc)
Dist_AMX: Upper limit on independent distance estimate (kpc)
Dist_A: Independent distance estimate - takes precedence over other distance estimates for DIST and DIST1 (kpc)

Associations and survey parameters:

Assoc:       Names of other objects, e.g., supernova remnant, globular cluster or gamma-ray source 
             associated with the pulsar
Survey:      Surveys that detected the pulsar (discovery survey first). Click here for currently defined surveys.
OSurvey:     Surveys that detected the pulsar encoded as bits in integer
Date:        Date of discovery publication.
Type:        Type codes for the pulsar. Click here for available types.
NGlt:        Number of glitches observed for the pulsar

GLEP:        Epoch of glitch 
GLPH: Phase increment at glitch
GLF0: Permanent pulse frequency increment at glitch
GLFI: Permanent frequency derivative increment at glitch
GLF0D: Decaying frequency increment at glitch
GLTD: Time constant for decaying frequency increment

Derived parameters:

R_Lum:       Radio luminosity at 400 MHz (mJy kpc2)
R_Lum14:     Radio luminosity at 1400 MHz (mJy kpc2)
Age:         Spin down age (yr) []
BSurf:       Surface magnetic flux density (Gauss) []
Edot:        Spin down energy loss rate (ergs/s)
Edotd2:      Energy flux at the Sun (ergs/kpc2/s)
PMTot:       Total proper motion (mas/yr)
VTrans:      Transverse velocity - based on DIST (km/s)
P1_i:        Period derivative corrected for Shklovskii (proper motion) effect 
Age_i:       Spin down age from P1_i (yr)
BSurf_i:     Surface magnetic dipole from P1_i (gauss)
B_LC:        Magnetic field at light cylinder

User Parameters

PAR1: A non-standard parameter entered by the user
PAR2: A non-standard parameter entered by the user
PAR3: A non-standard parameter entered by the user
PAR4: A non-standard parameter entered by the user

Appendix B: Pulsar Types

AXP Anomalous X-ray Pulsar or Soft Gamma-ray Repeater with detected pulsations
BINARY Pulsar has one or more stellar companion(s)
HE Spin-powered pulsar with pulsed emission from radio to infrared or higher frequencies
NRAD Spin-powered pulsar with pulsed emission only at infrared or higher frequencies
RADIO Pulsars with pulsed emission in the radio band
RRAT Pulsars with intermittently pulsed radio emission
XINS Isolated neutron stars with pulsed thermal X-ray emission but no detectable radio emission

Appendix C: Binary Companion Types

MS Main-sequence star
NS Neutron star
CO CO or ONeMg White Dwarf
He Helium White Dwarf
UL Ultra-light companion or planet (mass < 0.08 solar masses)
Note: If there is more than one companion, "T" (for Triple) is appended to the companion type. The innermost companion determines the type.