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CBATPICAGN - CGRO BATSE-observed Piccinotti Sample of Active Galactic Nuclei |
HEASARC Archive |
BATSE Observations of the Piccinotti Sample of Active Galactic Nuclei Malizia A., Bassani L., Zhang S.N., Dean A.J., Paciesas W.S., Palumbo G.G.C. <Astrophysical Journal, 519, 637-641, 1999 July 10> =1999ApJ...519..637M
Name
A frequently used designation for the object.
Type
Optical classification of the object, e.g., Seyfert 1, BL Lac, etc.;
notice that SB stands for starburst galaxy.
HEAO1_Name
The HEAO-1 designation for the object (not in Malizia et al.
1999, in general, but taken by the HEASARC from the original Piccinotti
Catalog (Piccinotti et al. 1982, ApJ, 253, 485: the HEASARC A2PIC database).
RA
The right ascension of the object (not in Malizia et al. 1999, but taken
by the HEASARC from the original Piccinotti
Catalog (Piccinotti et al. 1982, ApJ, 253, 485: the HEASARC A2PIC database).
Dec
The declination of the object (not in Malizia et al. 1999, but taken
by the HEASARC from the original Piccinotti
Catalog (Piccinotti et al. 1982, ApJ, 253, 485: the HEASARC A2PIC database).
LII
The galactic longitude of the object (not in Malizia et al. 1999, but
taken by the HEASARC from the original Piccinotti
Catalog (Piccinotti et al. 1982, ApJ, 253, 485: the HEASARC A2PIC database).
BII
The galactic latitude of the object (not in Malizia et al. 1999, but
taken by the HEASARC from the original Piccinotti
Catalog (Piccinotti et al. 1982, ApJ, 253, 485: the HEASARC A2PIC database).
Flux_Mean
The mean 2-10 keV flux in units of erg cm-2 s-1, as estimated by
the authors based on data values in the literature.
Vr
The observed flux variability in the 2-10 keV band, as estimated by
the authors based on data values in the literature.
Flux_BATSE
The weighted mean 20-100 keV flux as measured by BATSE, calculated
over nearly 4 years of observations. Fluxes in the 20-100 keV energy band were
obtained by folding a single power law of photon index 1.75 for Seyfert
galaxies, 3C 273, and M82, and 2.25 for BL Lac objects, with the BATSE
instrumental response function. Although these mean estimates depend on the
choice of photon index, the differences in fluxes are of the order of
10-20% around the values quoted here for changes in the power law of +/- 0.25.
If this flux_batse parameter is left blank, this indicates that the source was
not detected by BATSE: the 2 sigma upper limit to the BATSE flux is given in
the parameter flux_batse_error in such cases.
Flux_BATSE_Error
The error in the weighted mean 20-100 keV flux as measured
by BATSE for BATSE detections, or the 2 sigma upper limit to the BATSE flux
for nondetections.
N_BATSE
The statistical significance of the BATSE detection, i.e, the number
of sigma.
Flux_Ratio
The weighted mean value of the BATSE/OSSE flux ratios in the
20-100 keV energy band for cases when there are contemporaneous BATSE and
OSSE data. Notice that the weighted mean value of this parameter for the
full sample is 1.36 +/- 0.03 confirming previous reports of a BATSE/OSSE
normalization discrepancy, and further indicating that, in the particular
case of extragalactic sources, the BATSE flux can be systematically higher
than the OSSE flux by as much as 35%.
Flux_Ratio_Error
The error in the weighted mean value of the BATSE/OSSE
flux ratios.
OSSE_Coverage
For contemporaneous BATSE and OSSE observations: the first
number indicates the number of viewing periods examined by the authors,
while the second number indicates the total number of observation days
analyzed over those periods.
Class
The HEASARC Browse source classification, created by the HEASARC based on the
optical classification given in the type parameter.