J/ApJS/210/18 X-ray survey of the Galactic Bulge (CXOGBS) (Jonker+, 2014)
The Galactic Bulge Survey: completion of the X-ray survey observations
Jonker P.G., Torres M.A.P., Hynes R.I., Maccarone T.J., Steeghs D.,
Greiss S., Britt C.T., Wu J., Johnson C.B., Nelemans G., Heinke C.
<Astrophys. J. Suppl. Ser., 210, 18 (2014)>
=2014ApJS..210...18J 2014ApJS..210...18J (1312.3192)
ADC_Keywords: X-ray sources ; Surveys
Keywords: accretion, accretion disks - binaries: symbiotic -
novae, cataclysmic variables - stars: activity -X-rays: binaries
Abstract:
We provide the Chandra source list for the last ∼quarter of the area
covered by the Galactic Bulge Survey (GBS). The GBS targets two strips
of 6x1° (12sq.deg. in total), one above (1<°b<2°) and one
below (-2°<b←1°) the Galactic plane in the direction of the
Galactic Center at X-ray, optical and near-infrared wavelengths. For
the X-ray part of the survey we use 2ks per Chandra pointing. We find
424 X-ray sources in the 63 Chandra observations we report on here.
These sources are in addition to the 1216 X-ray sources discovered in
the first part of the GBS survey described before. We discuss the
characteristics and the X-ray variability of the brightest of the
sources as well as the radio properties from existing radio surveys.
We point out an interesting asymmetry in the number of X-ray sources
as a function of their Galactic l and b coordinates which is probably
caused by differences in average extinction towards the different
parts of the GBS survey area.
Description:
This table includes all X-ray sources.
It supersedes the previous catalogue (J/ApJS/194/18)
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
cxogbs.dat 99 1658 The GBS X-ray full X-ray source catalog
(includes the sources published in J/ApJS/194/18)
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See also:
J/AcA/62/133 : Optical counterparts of X-ray sources in OGLE (Udalski+, 2012)
J/ApJ/685/463 : ChaMPlane X-ray sources in the Galactic bulge (Koenig+, 2008)
J/ApJ/700/1702 : ChaMPlane deep galactic bulge survey. (van den Berg+, 2009)
Byte-by-byte Description of file: cxogbs.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- --- [CXOGBS]
7- 22 A16 --- CXOGBS Source name (JHHMMSS.s+DDMMSS)
24- 25 A2 --- --- [CX]
26- 29 A4 --- CX Source index number (1-1234;B1-B424) (1)
31- 41 F11.7 deg RAdeg Right Ascension (J2000)
43- 53 F11.7 deg DEdeg Declination (J2000)
55- 58 F4.2 arcsec e_RAdeg Error in RAdeg (3σ)
60- 63 F4.2 arcsec e_DEdeg Error in DEdeg (3σ)
65- 68 I4 ct Total Number of counts detected
70- 74 I5 --- ObsID Chandra observation identification number
76- 80 F5.2 arcmin OAxis Off-axis angle source detected
82 I1 --- Ndet Number of detections
84- 88 F5.2 arcsec Dpos 95% confidence positional uncertainty
90- 94 F5.2 --- HR [-2/1]? Hardness ratio (2)
96- 99 F4.2 --- e_HR ? Error in HR
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Note (1): sources are numbered 1 to 1234 for sources present in the previous
paper (J/ApJS/194/18, <[JBN2011] NNNN> in SIMBAD); new sources are
numbered B1 to B424 (<[JTH2014] CXBNNN> in SIMBAD).
Note (2): The extreme hardness ratio for the sources CX67, CX77, and CX72
is caused by the fact that the detection of the sources that was most
on-axis had very low count rates. Given that the detection most
on-axis was used for the calculation of the hardness ratio, the
hardness ratio of these sources was done using a few counts only and
as a result it carries a large uncertainty.
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Acknowledgements:
Peter Jonker (Netherland Institute for Space Research)
(End) Francois Ochsenbein CDS 17-Dec-2013