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J/ApJ/701/811      Chandra observations of INTEGRAL sources     (Tomsick+, 2009)

Chandra localizations and spectra of INTEGRAL sources in the Galactic plane: the cycle 9 sample. Tomsick J.A., Chaty S., Rodriguez J., Walter R., Kaaret P. <Astrophys. J., 701, 811-823 (2009)> =2009ApJ...701..811T
ADC_Keywords: X-ray sources ; Cross identifications Keywords: black hole physics - infrared: stars - stars: individual (IGR J07295-1329, IGR J09485-4726, IGR J11098-6457, IGR J13186-6257, IGR J14003-6326, IGR J14331-6112, IGR J14471-6414, IGR J15529-5029, IGR J16287-5021, IGR J17354-3255, IGR J17404-3655, IGR J17448-3232, IGR J17461-2204, IGR J17487-3124, IGR J17507-2647, IGR J17586-2129, IGR J18134-1636, IGR J18173-2509, IGR J18308-1232, IGR J18485-0047, IGR J19267+1325, IGR J19443+2117) - stars: neutron - white dwarfs - X-rays: stars Abstract: We report on 0.3-10keV X-ray observations by the Chandra X-ray Observatory of the fields of 22 sources that were discovered as hard X-ray (20-100keV) sources by the International Gamma-Ray Astrophysics Satellite ("IGR" sources). The observations were made during Chandra's 9th observing cycle, and their purpose is to localize the sources and to measure their soft X-ray spectra in order to determine the nature of the sources. We find very likely Chandra counterparts for 18 of the 22 sources. Description: For Chandra follow-up observations, we chose sources from the 27th INTEGRAL General Reference Catalog that were detected in the 20-40keV band as of 2007 March. We chose the 22 sources listed in Table 1 for ∼5ks "snapshot" observations, between 2007 November and 2009 February, with Chandra to provide precise X-ray localizations as well as information about their soft X-ray spectra. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 51 22 Chandra observations table2.dat 82 408 Chandra candidate counterparts to IGR sources
See also: B/chandra : The Chandra Archive Log (CXC, 1999-) J/A+A/523/A61 : INTEGRAL all-sky survey of hard X-ray sources (Krivonos+, 2010) J/A+A/484/783 : Spectroscopy of 7 INTEGRAL X-ray sources (Chaty+, 2008) J/ApJS/170/175 : Third IBIS/ISGRI soft gamma-ray survey catalog (Bird+, 2007) J/A+A/467/585 : Sources detected by ISGRI (Bodaghee+, 2007) J/A+A/411/L59 : INTEGRAL reference catalog (Ebisawa+, 2003) : INTEGRAL science data center Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 11 A11 --- IGR IGR name (JHHMMm+DDMM) 13- 16 I4 --- ObsID Chandra observation number 18- 23 F6.2 deg GLON Galactic longitude in degrees 25- 29 F5.2 deg GLAT Galactic latitude in degrees 31- 40 A10 "YYYY/MM/DD" ObsDate Date of observation 42- 46 F5.2 h ObsTime Start time of observation 48- 51 I4 s ExpT Exposure time
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 A3 --- --- [IGR] 5- 15 A11 --- IGR IGR source name (JHHMMm+DDMM) 17- 32 A16 --- CXOU Chandra source name (JHHMMSS.s+DDMMSS) 34- 38 F5.2 arcmin theta Angular distance from gamma-ray source (1) 40- 41 I2 h RAh X-ray hour of Right Ascension (J2000) (2) 43- 44 I2 min RAm X-ray minute of Right Ascension (J2000) (2) 46- 50 F5.2 s RAs X-ray second of Right Ascension (J2000) (2) 52 A1 --- DE- X-ray sign of the Declination (J2000) (2) 53- 54 I2 deg DEd X-ray degree of Declination (J2000) (2) 56- 57 I2 arcmin DEm X-ray arcminute of Declination (J2000) (2) 59- 62 F4.1 arcsec DEs X-ray arcsecond of Declination (J2000) (2) 64- 69 F6.1 ct Cts Chandra/ACIS observed counts in the 20-40keV 71- 76 F6.3 --- HR ? Hardness ratio (3) 78- 82 F5.3 --- e_HR ? Uncertainty in HR
Note (1): Between the center of the INTEGRAL error circle, which is also the approximate Chandra aimpoint, and the source. Note (2): The position uncertainties for these relatively bright sources are dominated by the systematic error, which is 0.64" at 90% confidence and 1" at 99% confidence (Weisskopf M.C., Note (3): Where HR=(C2-C1)/(C2+C1) and C1 is the number of source counts in the 0.3-2keV band and C2 is the number of source counts in the 2-10keV band.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 08-Sep-2011
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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