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EGRETSRC: Help

EGRETSRC - EGRET Sources Catalog

Overview

The EGRETSRC database contains information on all discrete sources seen in the First EGRET source catalog (Fichtel, C.E. et al., 1994, ApJS, 94, 511). It combines information on pulsars, AGN's, and the unidentified high and low galactic latitude sources, and includes the detection of the LMC. Upper limits are not included, but if the source was detected in more than one viewing, then several entries may be included. For each source a GRO name and, where possible, a counterpart name is given.

Parameters

Name
The name as given in the catalog.

The names of pulsars and QSOs are taken from assumed identifications. For QSOs
it would be best to replace these with GRO names when we have the GRO
positions.

Alt_Name
An alternate name for the source.

RA
Right Ascension of the source.

For QSOs, the positions are taken from Mattox, Hartman, Molnar, Patnaik,
and Schachter, 1995.  These will be replaced by the EGRET team positions
if available.  The LMC position is taken from SIMBAD. 

Dec
Declination of the source.

For QSOs, the positions are taken from Mattox, Hartman, Molnar, Patnaik,
and Schachter, 1995.  These will be replaced by the EGRET team positions
if available.  The LMC position is taken from SIMBAD. 

Lii
Galactic longitude of the source.

For QSOs, the positions are taken from Mattox, Hartman, Molnar, Patnaik,
and Schachter, 1995.  These will be replaced by the EGRET team positions
if available.  The LMC position is taken from SIMBAD. 

Bii
Galactic latitude of the source.

For QSOs, the positions are taken from Mattox, Hartman, Molnar, Patnaik,
and Schachter, 1995.  These will be replaced by the EGRET team positions
if available.  The LMC position is taken from SIMBAD. 

Table
Table in which the object is found.

Type
Type of object.

Pos_Err
Error in position of source, in arcminutes.

Flux
Flux in units of 10^(-7)cts/sec/cm^2 for E > 100 MeV.

Flux_Err
Error in flux in same units.

Viewing_Period
`Allsky` means that data is derived from the concatenation of all data during
the verification period and Phase 1.  Combinations of viewing periods are also
indicated.

Time
Start time of the first viewing period used. Note that for `allsky` data this
is first day of verification period even if the object was not seen until later
in the mission.

End_Time
End time of the last day of the last viewing period used. Note that there is no
implication that a source was observed steadily between TJ Start and TJ End. 
Again for `allsky` data, this is always the last day of VP 44 regardless of
when the target was last observed. 
                                                                  
MJ_Start
Modified Julian day of the start of the first viewing period used.

MJ_End
Modified Julian day of the last day of the last viewing period used.  

P1
Object parameter 1. 

For pulsars, the three object parameters are frequency and its first
and second derivatives.

For QSO/BLLACs, `P1` is the measured spectral slope.  `P2` is the error in
the slope.  `P3` is not used.

P2
Object parameter 2.

For pulsars, the three object parameters are frequency and its first
and second derivatives.

For QSO/BLLACs, `P1` is the measured spectral slope.  `P2` is the error in
the slope.  `P3` is not used.

P3
Object parameter 3.

For pulsars, the three object parameters are frequency and its first
and second derivatives.

For QSO/BLLACs, `P1` is the measured spectral slope.  `P2` is the error in
the slope.  `P3` is not used.

Class
BROWSE classification.

Provenance

This database table was created by a cooperative effort of the HEASARC and the Compton Observatory Science Support Center (COSSC).

Contact Person

Questions regarding the EGRETSRC database table can be addressed to the HEASARC User Hotline.
If you have any problems, please consult the help page or mail ledas-help@star.le.ac.uk
 
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