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## ATNFPULSAR - ATNF Pulsar Catalog |
HEASARC Archive |

Many people have contributed to the compilation of the data contained in this catalog and the database that it was derived from. The authors 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. The also acknowledge the efforts of Warwick University students Adam Goode and Steven Thomas who compiled and checked a recent version of the database. The original (summer 2003) database at the ATNF website was compiled with the invaluable assistance of Maryam Hobbs, while the ATNF web interface was designed and constructed by Albert Teoh, a Summer Vacation Scholar at the ATNF in 2002/2003.

The authors would appreciate if anyone making use of this catalog in a publication acknowledges the source of their information by quoting the ATNF Pulsar Catalog website address of http://www.atnf.csiro.au/research/pulsar/psrcat/

"The Australia Telescope National Facility Pulsar Catalogue" by R.N. Manchester, G.B. Hobbs, A. Teoh and M. Hobbs 2005, AJ, 129, 1993 "ATNF Pulsar Catalog" by R.N. Manchester et al., at http://www.atnf.csiro.au/research/pulsar/psrcat/ "Catalog of 558 Pulsars" by J.H. Taylor, R.N. Manchester and A.G. Lyne 1993, ApJS, 88, 529-568.

Changes to the catalog are logged at http://www.atnf.csiro.au/research/pulsar/psrcat/catalogueHistory.html.

The HEASARC table will be updated on a weekly basis whenever the original ATNF database table is updated.

**Name**

The name of the pulsar using the standard designation for pulsars,
based on its J2000 coordinates.

**Alt_Name**

The alternative pulsar designation, based on its B1950 Coordinates,
where used.

**Ref_Names**

The reference code for the quoted pulsar designation(s).
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**RA**

The Right Ascension of the pulsar in the selected equinox. The RA is
given in J2000 coordinates and to various precisions in the original ATNF
table, ranging from 1.0E-08 seconds of time to 1 minute of time. The HEASARC
Browse system's built-in precession routines are not of astrometric accuracy,
and thus we recommend using the default J2000 equinox for positions when
querying this database. Even then, the Right Ascensions in this HEASARC table
are displayed only up to a precision of 0.0001 seconds of time; for those
specialized applications where a higher positional accuracy is desired, users
should consult the original version of these data at the ATNF Pulsar Group
website, http://www.atnf.csiro.au/research/pulsar/psrcat/.

**RA_Error**

The Right Ascension positional uncertainty (seconds).

**Ref_RA**

The reference code for the Right Ascension information.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Dec**

The Declination of the pulsar in the selected equinox. The Declination
is given in J2000 coordinates and to various precisions in the original ATNF
table, ranging from 1.0E-05 arcseconds to 1 arcminute. The HEASARC Browse
system's built-in precession routines are not of astrometric accuracy, and
thus we recommend using the default J2000 equinox for positions when querying
this database. Even then, the Declinations in this HEASARC table are
displayed only up to a precision of 0.001 arcseconds; for those specialized
applications where a higher positional accuracy is desired, users should
consult the original version of these data at the ATNF Pulsar Group website,
http://www.atnf.csiro.au/research/pulsar/psrcat/

**Dec_Error**

The Declination positional uncertainty (arcsec).

**Ref_Dec**

The reference code for the Declination information.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**PM_RA**

The proper motion in Right Ascension (mas/yr).

**PM_RA_Error**

The uncertainty in the proper motion in Right
Ascension (mas/yr).

**Ref_PM_RA**

The reference code for the proper motion in Right Ascension.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**PM_Dec**

The proper motion in Declination (mas/yr).

**PM_Dec_Error**

The uncertainty in the proper motion in Declination (mas/yr).

**Ref_PM_Dec**

The reference code for the proper motion in Declination.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Parallax**

The annual parallax, in milliarcseconds (mas).

**Parallax_Error**

The uncertainty in the annual parallax (mas).

**Ref_Parallax**

The reference code for the parallax information.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Position_Epoch**

The epoch at which the position was measured.

**LII**

The Galactic Longitude of the pulsar.

**BII**

The Galactic Latitude of the pulsar.

**Period**

The pulsar barycentric period, in seconds. This is given to various
precisions in the originating table, notice, up to more than 16 decimal
places. In this HEASARC table, the period is displayed (in character form)
exactly the way it is given at the ATNF Pulsar Group website,
http://www.atnf.csiro.au/research/pulsar/psrcat/

**Period_Error**

The uncertainty in the pulsar barycentric period, in seconds.

**Ref_Period**

The reference code for the pulsar barycentric period.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Period_Dot**

The first time derivative of the barycentric period (s/s, i.e.,
dimensionless).

**Period_Dot_Error**

The uncertainty in the time derivative of the
barycentric period (s/s, i.e., dimensionless).

**Ref_Period_Dot**

The reference code for the time derivative of the
barycentric period. The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Nu**

The pulsar barycentric rotation frequency (Hz).
In this HEASARC table, the frequency is displayed (in character form)
exactly the way it is given at the ATNF Pulsar Group website,
http://www.atnf.csiro.au/research/pulsar/psrcat/

**Nu_Error**

The uncertainty in the barycentric rotation frequency (Hz).

**Ref_Nu**

The reference code for the barycentric rotation frequency.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Nu_Dot**

The (first) time derivative of the barycentric rotation frequency
(s^{-2}).

**Nu_Dot_Error**

The uncertainty in the time derivative of the barycentric
rotation frequency (s^{-2}).

**Ref_Nu_Dot**

The reference code for the time derivative of the barycentric
rotation frequency. The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Nu_Dot_2**

The second time derivative of the barycentric rotation frequency
(s^{-3}).

**Nu_Dot_2_Error**

The uncertainty in the second time derivative of the
barycentric rotation frequency (s^{-3}).

**Ref_Nu_Dot_2**

The reference code for the second time derivative of
the barycentric rotation frequency. The key to these codes is available at
the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Nu_Dot_3**

The third time derivative of the barycentric rotation frequency
(s^{-4}).

**Nu_Dot_3_Error**

The uncertainty in the third time derivative of the
barycentric rotation frequency (s^{-4}).

**Ref_Nu_Dot_3**

The reference code for the third time derivative of the
barycentric rotation frequency. The key to these codes is available at
the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Period_Epoch**

The epoch of the period or frequency measurement.

**DM**

The pulsar dispersion measure (DM), in units of pc/cm^{3}.

**DM_Error**

The uncertainty in the pulsar dispersion measure, in units
of pc/cm^{3}.

**Ref_Dm**

The reference code for the dispersion measure.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**DM_Dot**

The first time derivative of the dispersion measure (pc/cm^{3}/yr).

**DM_Dot_Error**

The uncertainty in the time derivative of the dispersion
measure (pc/cm^{3}/yr).

**Ref_Dm_Dot**

The reference code for the time derivative of the dispersion
measure. The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Rm**

The pulsar rotation measure (RM), in units of radian/m^{2}.

**Rm_Error**

The uncertainty in the pulsar rotation measure (RM), in units
of radian/m^{2}.

**Ref_Rm**

The reference code for the rotation measure.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Pulse_Width_50**

The width of the pulse at 50% of the peak (ms).
Note that pulse widths are a function of both observing frequency and
observational time resolution, so the quoted widths are illustrative only.
Refer to the original reference for details.

**Ref_Pulse_Width_50**

The reference code for the width of the pulse at 50%
of the peak. The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Pulse_Width_10**

The width of the pulse at 10% of the peak (ms).
Note that pulse widths are a function of both observing frequency and
observational time resolution, so the quoted widths are illustrative only.
Refer to the original reference for details.

**Ref_Pulse_Width_10**

The reference code for the width of the pulse at 10%
of the peak. The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Tau_Scattering**

The temporal broadening of the pulses at 1 GHz due to
interstellar scattering (s).

**Ref_Tau_Scattering**

The reference code for the Tau_Scattering parameter.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Flux_400_MHz**

The mean flux density at 400 MHz (mJy).

**Flux_400_MHz_Error**

The uncertainty in the mean 400-MHz flux density (mJy).

**Ref_Flux_400_MHz**

The reference code for the mean 400-MHz flux density.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Flux_1400_MHz**

The mean flux density at 1400 MHz (mJy).

**Flux_1400_MHz_Error**

The uncertainty in the mean 1400-MHz flux density (mJy).

**Ref_Flux_1400_MHz**

The reference code for the mean 1400-MHz flux density.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Flux_2000_MHz**

The mean flux density at 2000 MHz (mJy).

**Flux_2000_MHz_Error**

The uncertainty in the mean 2000-MHz flux density (mJy).

**Ref_Flux_2000_MHz**

The reference code for the mean 2000-MHz flux density.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Flux_600_MHz**

The mean flux density at 600 MHz (mJy).

**Flux_600_MHz_Error**

The uncertainty in the mean 600-MHz flux density (mJy).

**Ref_Flux_600_MHz**

The reference code for the mean 600-MHz flux density.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Flux_700_MHz**

The mean flux density at 700 MHz (mJy).

**Flux_700_MHz_Error**

The uncertainty in the mean 700-MHz flux density (mJy).

**Ref_Flux_700_MHz**

The reference code for the mean 700-MHz flux density.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Flux_800_MHz**

The mean flux density at 800 MHz (mJy).

**Flux_800_MHz_Error**

The uncertainty in the mean 800-MHz flux density (mJy).

**Ref_Flux_800_MHz**

The reference code for the mean 800-MHz flux density.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Flux_900_MHz**

The mean flux density at 900 MHz (mJy).

**Flux_900_MHz_Error**

The uncertainty in the mean 900-MHz flux density (mJy).

**Ref_Flux_900_MHz**

The reference code for the mean 900-MHz flux density.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Flux_1600_MHz**

The mean flux density at 1600 MHz (mJy).

**Flux_1600_MHz_Error**

The uncertainty in the mean 1600-MHz flux density (mJy).

**Ref_Flux_1600_MHz**

The reference code for the mean 1600-MHz flux density.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Flux_3000_MHz**

The mean flux density at 3000 MHz (mJy).

**Flux_3000_MHz_Error**

The uncertainty in the mean 3000-MHz flux density (mJy).

**Ref_Flux_3000_MHz**

The reference code for the mean 3000-MHz flux density.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Spect_Index**

The measured radio spectral index.

**Spect_Index_Error**

The uncertainty in the spectral index.

**Ref_Spect_Index**

The reference code for the spectral index.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Binary_Model**

The binary model type: normally one of several recognized by
the pulsar timing program TEMPO. The various models used by this software
are described at
http://www.atnf.csiro.au/research/pulsar/tempo/ref_man_sections/binary.txt

**T0**

The epoch of periastron passage.

**T0_Error**

The uncertainty in the epoch of periastron passage (days).

**Ref_T0**

The reference code for the epoch of periastron passage.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Period_Bin**

The orbital (binary) period of the pulsar (days).

**Period_Bin_Error**

The uncertainty in the binary period (days).

**Ref_Period_Bin**

The reference code for the orbital period of the pulsar.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**A1**

The projected orbital semi-major axis if the pulsar is in a
binary system (light seconds).

**A1_Error**

The uncertainty in the projected orbital semi-major axis
(light seconds).

**Ref_A1**

The reference code for the projected orbital semi-major axis.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Omega**

The longitude of periastron of the binary orbit (degrees).

**Omega_Error**

The uncertainty in the longitude of periastron of the binary
orbit (degrees).

**Ref_Omega**

The reference code for the orbital periastron longitude.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Eccentricity**

The eccentricity of the binary orbit.

**Eccentricity_Error**

The uncertainty in the eccentricity of the binary orbit.

**Ref_Eccentricity**

The reference code for the eccentricity of the binary
orbit. The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Epoch_Asc**

The epoch of the ascending node of the binary orbit.

**Epoch_Asc_Error**

The uncertainty in the epoch of the ascending node of
the binary orbit (days).

**Ref_Epoch_Asc**

The reference code for the epoch of the ascending node of
the binary orbit. The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Epsilon_1**

The parameter Eccentricity * sin(Omega) for the ELL1 binary
model.

**Epsilon_1_Error**

The uncertainty in the Epsilon_1 parameter.

**Ref_Epsilon_1**

The reference code for the Epsilon_1 parameter.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Epsilon_2**

The parameter Eccentricity * cos(Omega) for the ELL1 binary
model.

**Epsilon_2_Error**

The uncertainty in the Epsilon_2 parameter.

**Ref_Epsilon_2**

The reference code for the Epsilon_2 parameter.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Min_Mass**

The minimum companion mass for pulsars in binary systems, assuming
an orbital inclination i=90 degrees and a neutron star mass of 1.35 Solar Mass
Units (Solar Mass Units).

**Median_Mass**

The median companion mass for pulsars in binary systems,
assuming an orbital inclination i=60 degrees (Solar Mass Units).

**Companion_Type**

The type code for the pulsar's companion.
The key to these codes is available in Appendix C of the documentation at the
ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_help.html#bincomp_type

**Ref_Companion_Type**

The reference code for the companion type.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Mass_Ratio**

The mass ratio of the binary (M1/M2).

**Mass_Ratio_Error**

The uncertainty in the mass ratio of the binary.

**Ref_Mass_Ratio**

The reference code for the mass ratio of the binary.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Omega_Asc**

The longitude on the sky of the ascending node of the binary
orbit (from N toward E), in degrees.

**Omega_Asc_Error**

The uncertainty in the Omega_Asc parameter, in degrees.

**Ref_Omega_Asc**

The reference code for the Omega_Asc parameter.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Distance**

The best estimate of the (heliocentric) distance to the pulsar
(kpc).

**DM_Distance_Limit**

A flag parameter which is set to '>' to indicate
that the quoted value of the Dm_distance parameter is a lower limit to
the actual value.

**DM_Distance**

The distance based on the Taylor & Cordes (1993, ApJ, 411, 674)
electron density model (kpc).

**DM_Sin_BII**

The parameter DM*sin(bii) (pc/cm^{3}).

**Z_Distance**

The pulsar's distance from the Galactic Plane, based on the
quoted heliocentric distance.

**X_Distance**

The pulsar's X-Distance in the X-Y-Z Galactic coordinate system
(kpc).

**Y_Distance**

The pulsar's Y-Distance in the X-Y-Z Galactic coordinate system
(kpc).

**Assoc_Object**

The name(s) of other objects, for example supernova remnants or
globular clusters, associated with the pulsar, and their corresponding
reference codes (in square brackets). The key to these codes is available at
the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_help.html#surveys

**Discovery_Survey**

The survey code(s) corresponding to the surveys in which
the pulsar was detected (the discovery survey is listed first).
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_help.html#surveys

**Discovery_Date**

The date of the discovery publication (calendar year).

**Pulsar_Type**

The type code for the pulsar.
The key to these codes is available in Appendix B of the documentation at the
ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_help.html#psr_types

**Ref_Pulsar_Type**

The reference code for pulsar type.
The key to these codes is available at the ATNF website:
http://www.atnf.csiro.au/research/pulsar/psrcat/psrcat_ref.html

**Number_Glitches**

The number of glitches observed for the pulsar.

**Luminosity_400_MHz**

The radio luminosity at 400 MHz (mJy kpc^{2}).

**Luminosity_1400_MHz**

The radio luminosity at 1400 MHz (mJy kpc^{2}).

**Age**

The spin-down age of the pulsar (0.5*Period/Period_dot, in years).

**B_Surf**

The surface magnetic flux density of the pulsar
(3.2*10^19^{ * (Period*Period_dot)}0.5), in Gauss.

**E_Dot**

The spin-down energy-loss rate of the pulsar (erg/s).

**E_Flux**

The energy flux at the Sun (ergs/cm^{2}/s).

**PM_Tot**

The total proper motion of the pulsar (mas/yr).

**PM_Tot_Error**

The uncertainty in the total proper motion (mas/yr).

**Transverse_Velocity**

The transverse velocity of the pulsar, based on the
the quoted Distance value (km/s).

**Corr_Period_Dot**

The pulse period derivative corrected for the proper
motion effect (s/s, i.e., dimensionless).

**Corr_Age**

The corrected spin-down age using Corr_Period_Dot (years).

**Corr_B_Surf**

The corrected surface magnetic dipole field using
Corr_period_dot (Gauss).

**B_Lc**

The magnetic field at the light cylinder (Gauss).

**Class**

The HEASARC Browse object classification based on the value of
the pulsar_type_parameter.