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This page describes archival timing data for pulsars being timed at the Parkes Observatory by astromomers from the CSIRO Australia Telescope National Facility, Sydney and Parkes. The primary purpose of the data archive is to provide data for other observers, for example, those using high-energy astronomical facilities, to enable them to average data synchronously with the pulsar period.
If data from the archive are used in a publication, please acknowledge the Australian Pulsar Timing Archive and quote the WWW address:
http://www.atnf.csiro.au/research/pulsar/archive/Please also advise Dick Manchester of the use made of the facility and send a preprint. If special observations are required, please contact Dick. In such cases, or where extensive use is made of the archive, co-authorship of papers is normally negotiated.
Data are presented in a data file in the form of a one-line entry giving the pulsar position and period and a validity range. For binary pulsars, there is a second line giving the binary parameters. The data are produced using the timing analysis program TEMPO. A description of TEMPO may be found at TEMPO.
The format of the data lines is as follows:
Char 1-8: Pulsar name (truncated if a J2000 name)
Char 10-21: J2000 right ascension (hh mm ss.sss)
Char 23-34: J2000 declination (-dd mm ss.ss)
Char 36-40: Start of validity range (MJD)
Char 42-46: End of validity range (MJD)
Char 48-62: TDB epoch of pulse frequencies and infinite frequency UTC pulse TOA
at geocentre (MJD)
Char 64-80: Pulse frequency at the Solar system barycentre (Hz)
Char 82-93: First time derivative of barycentric pulse frequency (s-2)
Char 96-104: Second time derivative of barycentric pulse frequency (s-3)
Char 106-109: Rms residual of fit in milliperiods
Char 111: Letter code indicating origin of data (A = Australia)
Char 115-119: Planetary system ephemeris used for barycentere correction
Char 121-130: Full J2000 pulsar name
For binary pulsars, there is a second line as follows:
Char 1-8: Pulsar name (truncated if a J2000 name)
Char 10-25: Orbital period (at the Solar system barycentre) (s)
Char 26-37: Semi-major axis of pulsar orbit (s)
Char 39-48: Orbital eccentricity
Char 50-63: TDB epoch of periastron passage (MJD)
Char 65-74: Longitude of periastron (deg)
Char 76-82: Rate of periastron advance (deg/yr)
Char 84-91: Time dilation and gravitational redshift term (gamma) (s)
Char 93-102: First time derivative of orbital period
Char 104: Letter code indicating origin of data (A = Australia)