Tutorials.NewStudentsGuide History
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October 16, 2007, at 09:56 AM
by sbates - spelling
Changed lines 19-20 from:
Luckaly however, most software packages will read and write many different data formats, care is advised however as sometimes they do not read/write them in the same way!
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Luckily however, most software packages will read and write many different data formats, care is advised however as sometimes they do not read/write them in the same way!
August 09, 2007, at 06:53 AM
by mkeith - Added a bit, made some corrections. Reduced harshness about data formats :p
Changed lines 19-28 from:
Unfortunately most data formats are not well specified, and are only described by a few C or Fortran interface files.
Pulsar data formats cover many things
- Ephemerides - These are data that describe all the parameters used in the timing model for the pulsar.
They can be used to predict the time of arrival of pulses from the pulsar. These are usualy .eph or .par files, and are text based files.
- Polyco - These are a set of polynomial coefficients that describe the pulsar period as a function of time. They can be used to very accurately track the rotation of the pulsar, but the length of time that the polyco holds true for is determined by the number of coefficients. These are generated from ephemerides when doing high precision timing. These are usually text files with a .polyco extention.
to:
Luckaly however, most software packages will read and write many different data formats, care is advised however as sometimes they do not read/write them in the same way!
Changed lines 32-33 from:
This database has a large and valuable collection of profile information for many pulsars, however due to the European nature of the project it mainly covers northern hemisphere pulsars.
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This database has a large and valuable collection of profile information for many pulsars.
August 09, 2007, at 06:50 AM
by mkeith -
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There is now also an online version of psrrefs, avaliable at http://www.pulsarastronomy.net/psrrefs/
This is searchable and editable, a handy resource for finding the bibtex code a particular paper.
Note that this includes entries from psrrefs and modrefs.
April 25, 2007, at 10:00 AM
by mkeith -
Changed line 29 from:
There are some very useful catalogues of pulsar details.
to:
There are some very useful catalogues of pulsar details.
April 25, 2007, at 09:35 AM
by mkeith -
Added lines 16-37:
Unfortunately most data formats are not well specified, and are only described by a few C or Fortran interface files.
Pulsar data formats cover many things
- Ephemerides - These are data that describe all the parameters used in the timing model for the pulsar.
They can be used to predict the time of arrival of pulses from the pulsar. These are usualy .eph or .par files, and are text based files.
- Polyco - These are a set of polynomial coefficients that describe the pulsar period as a function of time. They can be used to very accurately track the rotation of the pulsar, but the length of time that the polyco holds true for is determined by the number of coefficients. These are generated from ephemerides when doing high precision timing. These are usually text files with a .polyco extention.
- The most common data formats are listed under DataFormats
- See the software page for common pulsar software packages.
Catalogues
There are some very useful catalogues of pulsar details.
- PSRCAT - This is the largest and most complete catalogue of pulsar details, hosted at the ATNF.
PSRCAT has a command line interface and a web interface.
The web interface covers nearly all published pulsar parameters, however new sources that are unpublished are missing from the catalogue.
The command line tool can be very up to date (including unconfirmed sources), provided the database files are updated regularly.
The most up to date catalogue is generally only available from ATNF machines.
- EPN Database - This is a database of pulse profiles from the European Pulsar Network.
This database has a large and valuable collection of profile information for many pulsars, however due to the European nature of the project it mainly covers northern hemisphere pulsars.
April 25, 2007, at 09:17 AM
by mkeith -
Added lines 1-15: