Tempo version 11.000
Tempo version 11.000 is a substantial revsion of the program.
Improvements include a new, friendlier input file format,
better astrometric algorithms, and a new binary model. Many
internal improvements were made to the code, most notably
the use modified Julian days throughout the program.
The revisions were coordinated by and largely written by Dick
Manchester, with major input from Joe Taylor, David Nice, Alan Irwin
and Norbert Wex.
The major changes are:
To the Tempo 11 installation
- The CfA PEP solar system ephemeris is no longer supported.
- All output is in J2000 coordinates, although B1950 may be used
- The JPL ephemerides are now read directly in the format
provided by JPL.
- A systematic error in use of TDB-TT corrections when
referencing the ephemeris has been corrected.
- DE200 and DE405 ephemerides for years 1950-2050 are supplied
with the standard Tempo distribution, but they could easily be
supplemented by other JPL-format ephemerides.
- A new free-format input file format has been added:
- Header information and TOAs may be in separate files or
in a single file.
- Parameters are identified by keyword.
- Parameters not previously available for input are now
allowed (F0, F1, F2, F3, Xdot, DMCOFx, etc.)
- Final parameters are output in a file with the same
format as the input files.
- Comments and blank lines are allowed throughout the files.
- Old-style files with fixed-format headers may still be used (`-o'
- The format of tempo.lis has been changed to emphasize rotation
frequencies rather than periods.
- The treatment of proper motions and parallax has been made
more rigorous. As part of this, a radial velocity term is
- There is an option to compute parameters corrected for
motion of the pulsar (`Shklovskii' effect).
- Internal 1966 day numbers have been eliminated. They
are still allowed in input files for backwards compatability.
- A new binary model (DD+) accounts more accurately for orbital
precession due to spin-orbit coupling.
- The ephemeris prediction system (`tz') has been modified:
- Pulsar names may have up to 10 characters.
- Pulsar parameters may be spread among many files
- Absolute phase calculations have been improved.
- A doppler-shift factor has been added to the output.
- Confiuration file tempo.cfg has been revamped.
To the Tempo 11 reference
Back to main Tempo page.