IBISCAT4 - Fourth IBIS/ISGRI Soft Gamma-Ray Survey Catalog
The Fourth IBIS/ISGRI Soft Gamma-Ray Survey Catalog. Bird A.J., Bazzano A., Bassani L., Capitanio F., Fiocchi M., Hill A.B., Malizia A., McBride V.A., Scaringi S., Sguera V., Stephen J.B., Ubertini P., Dean A.J., Lebrun F., Terrier R., Renaud M., Mattana F., Gotz D., Rodriguez J., Belanger G., Walter R., Winkler C. <Astrophys. J. Suppl., 186, 1-9 (2010)> =2010ApJS..186....1B (SIMBAD/NED BibCode)
The standard designation for the source. Sources discovered by INTEGRAL have been given names using the IGR prefix.
This parameter is a flag which can have the following non-blank values:
b = New detection since the third catalog; j = Blended source. Position determined by simultaneous fitting is reliable, but other measured values (flux, significance) may be contaminated by nearby source(s) and are unreliable.
The Right Ascension of the high-energy source in the selected equinox. This was given in J2000.0 coordinates and to a precision of 0.001 degrees in the original table.
The Declination of the high-energy source in the selected equinox. This was given in J2000.0 coordinates and to a precision of 0.001 degrees in the original table.
The Galactic Longitude of the high-energy source.
The Galactic Latitude of the high-energy source.
The positional error of the high-energy source, in arcminutes, expressed as the radius of the 90% confidence circle.
This parameter is set to '<' if the associated soft-band flux of the particular source is an upper limit rather than a detection.
The time-averaged flux of the high-energy source in the soft energy band (20 - 40 keV), in units of milliCrab (mCrab). Appropriate conversion factors for this band are 10 mCrab = 7.57 x 10-11 erg/cm2/s = 1.71 x 10-3 photons/cm2/s.
The uncertainty in the time-averaged 20 - 40 keV flux, in mCrab.
This parameter is set to '<' if the associated hard-band flux of the particular source is an upper limit rather than a detection.
The time-averaged flux of the high-energy source in the hard energy band (40 - 100 keV), in units of milliCrab (mCrab). Appropriate conversion factors for this band are 10 mCrab = 9.42 x 10-11 erg/cm2/s = 9.67 x 10^-4 photons/cm2/s.
The uncertainty in the time-averaged 40 - 100 keV Flux, in mCrab.
The astrophysical type(s) of the high-energy source. Up to 4 types may be given: these follow the convention of Liu et al. (2007, A&A, 469, 807), wherever possible. The following abbreviations have been used:
A = Atoll source (neutron star); AGN = Active galactic nuclei; AXP = Anomalous X-ray pulsar; B = Burster (neutron star); Be = B-type emission-line star; BH = Black hole (confirmed mass evaluation); BHC = Black hole candidate; BL = broad line; Cluster = Cluster of galaxies; CV = Cataclysmic variable; D = Dipping source; DN = Dwarf Nova; G = Globular Cluster X-ray source; GRB = Gamma-Ray Burst; HMXB = High-mass X-ray binary; IP = Intermediate Polar; LMXB = Low-mass X-ray binary; M = Microquasar; Mol Cloud = Molecular cloud; NL = narrow line; NS = Neutron Star; P = Polar; PSR = Radio pulsar; PWN = Pulsar wind nebula; QSO = Quasar; RG = Radio Galaxy; SFXT = Supergiant Fast X-ray Transient; SG = Supergiant; SGR = Soft gamma-ray repeater; SNR = Supernova remnant; Sy = Seyfert galaxy; Symb = Symbiotic star; T = Transient source; XB = Galactic X-ray binary; XBONG = X-ray bright, optically normal galaxy; XP = X-ray pulsar; Z = Z-type source (neutron star)
This parameter contains a flag which indicates the presence of source variability in the 20-40 keV band. A value of 'Y' indicates a bursticity of > 1.1, i.e., a 10% increase in significance can be obtained by selecting a subset of the data. A flag value of 'YY' indicates a bursticity of > 4, indicating a strongly variable source. In both cases, the peak flux is defined as the mean flux during the single period of time for which the significance is maximized.
If the source is variable, this parameter contains the peak 20-40 keV band flux, i.e., the flux measured during the largest detected outburst of the source, in mCrab.
The uncertainty in the peak 20-40 keV band flux, in mCrab.
The maximum significance of the high-energy source in a single map. This is given since it provides the best indication of the robustness of the source detection. Refer to the map_codes parameter in order to identify the map which has this maximum significance.
The corrected on-source exposure time, in seconds (s), given to a precision of 100 seconds. This parameter was given in kiloseconds (ks) in the original, as-published table.
This parameter identifies the energy-band map in which the source had its maximum significance: (B1) 20 - 40 keV; (B2) 30 - 60 keV; (B3) 20 - 100 keV; (B4) 17 - 30 keV; (B5) 18 - 60 keV; a prefix of "RXXX" indicates a detection in INTEGRAL revolution XXX, a prefix of "SXXX" indicates a detection in an INTEGRAL revolution sequence beginning at INTEGRAL revolution XXX; (ST) indicates staring data. Burst indicates that significance and position were obtained from a data subset defined by bursticity analysis (see section 2.4 of the reference paper). B1GCF indicates derived from fitting of the Galactic Center region (see section 3 of the reference paper).
The HEASARC Browse object classification, based on the value of the source_type parameter (typically the most specific part).