J/A+A/522/A68 Variable sources detected by INTEGRAL (Telezhinsky+, 2010)
The catalog of variable sources detected by INTEGRAL.
I. Catalog and techniques.
Telezhinsky I., Eckert D., Savchenko V., Neronov A., Produit N.,
Courvoisier T.J.-L.
<Astron. Astrophys. 522, A68 (2010)>
=2010A&A...522A..68T 2010A&A...522A..68T
ADC_Keywords: Surveys ; Gamma rays ; X-ray sources
Keywords: gamma-rays: observations - catalogs
Abstract:
In 6 years of operation, INTEGRAL/ISGRI revealed more than 500
sources. Many of these sources are variable. Taking into account that
nearly half of INTEGRAL/ISGRI sources are new and many of them are
still unidentified, the variability properties of the sources can
serve as additional parameters that may help to classify and identify
the unknown sources.
In order to study the variability properties of the sources detected
by INTEGRAL/ISGRI we develop a method to quantify the variability of
a source. We describe here our techniques and compile a catalog of the
sources that fit our criteria of variability.
Description:
The catalog gives the values of fractional variability, the flux, and
the corresponding 2σ errors of the sources from the INTEGRAL
Reference Catalog (Cat. J/A+A/411/L59) version 30. The data is given
for 3 energy bands: 20-40, 40-100, and 100-200keV. The exposure times
of the sources are given for each energy band only if the source was
detected in the given band. The last column gives the source type
according to the reference catalog. If the source is localized in more
then one map then the weighted mean values of the flux and variability
are given. The sources active during specific time periods and not
detected at the total variability map are indicated with "b" letter in
the Flag column. The sources detected only at the total variability
map are indicated with "i" letter respectively. Letter "g" indicates
that the source was affected by the "ghost". The numbers after the
variability columns show the time period map where the source is
visible and asterix means that the source is not detected at the
respective significance map. Lower limit for fractional variability is
given in such a case.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 159 202 The catalog of variable sources detected by INTEGRAL
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See also:
J/A+A/411/L59 : INTEGRAL reference catalog (Ebisawa+, 2003)
Byte-by-byte Description of file:table3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Source number in catalog
5- 22 A18 --- Name Source name
24- 25 A2 --- n_Name [bgi ] Source peculiarities (1)
27 A1 --- l_VB1 Limit flag on VB1 (2)
28- 33 F6.3 --- VB1 ?=- Fractional variability, band 20-40keV
35- 39 F5.3 --- e_VB1 ?=- VB1 error
41- 46 A6 --- Map1 Map number(s) where the source is detected (3)
48 A1 --- l_FB1 Limit flag on VF1 (2)
49- 55 F7.3 10-14W/m2 FB1 ?=- Flux, band 20-40keV (10-11erg/cm2/s)
57- 61 F5.3 10-14W/m2 e_FB1 ?=- FB1 error
63- 69 F7.1 ks EB1 ?=- Exposure time, band 20-40keV
71 A1 --- l_VB2 Limit flag on VB2 (2)
72- 77 F6.3 --- VB2 ?=- Fractional variability, band 40-100keV
79- 83 F5.3 --- e_VB2 ?=- VB2 error
85- 89 A5 --- Map2 Map number(s) where the source is detected (3)
91 A1 --- l_FB2 Limit flag on FB2 (2)
92- 98 F7.3 10-14W/m2 FB2 ?=- Flux, band 40-100 keV (10-11erg/cm2/s)
100-104 F5.3 10-14W/m2 e_FB2 ?=- FB2 error
106-112 F7.1 ks EB2 ?=- Exposure time, band 40-100keV
114 A1 --- l_VB3 Limit flag on VB3 (2)
115-119 F5.3 --- VB3 ?=- Fractional variability, band 100-200keV
121-125 F5.3 --- e_VB3 ?=- VB3 error
127-131 A5 --- Map3 Map number(s) where the source is detected (3)
133 A1 --- l_FB3 Limit flag on FB3 (2)
134-140 F7.3 10-14W/m2 FB3 ?=- Flux, band 100-200keV (10-11erg/cm2/s)
142-146 F5.3 10-14W/m2 e_FB3 ?=- FB3 error
148-154 F7.1 ks EB3 ?=- Exposure time, band 100-200keV
156-159 A4 --- Class Source class
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Note (1): Flags as follow:
b = sources active during specific time periods and not detected at
the total variability map
i = sources detected only at the total variability map
g = source variability is slightly affected by a "ghost", can go
along with "b" and "i" flags
Note (2): The fractional variability or flux record represents a 3σ
lower limit.
Note (3): The numbers show the time period map where the source is visible
and asterix means that the source is not detected at the respective
significance map. Lower limit for fractional variability is given in
such a case.
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Acknowledgements:
Igor Telezhinsky, telezhinsky(at)gmail.com
(End) Igor Telezhinsky [DESY, Germany], Patricia Vannier [CDS] 10-Aug-2010