Chandra and Optical Identification of INTEGRAL Sources
ATel #572; J. P. Halpern (Columbia U.)
on 1 Aug 2005; 18:34 UT
Credential Certification: Jules Halpern (jules@astro.columbia.edu)
Subjects: Optical, X-ray, Gamma Ray, AGN
Using public Chandra Director's Discretionary Time observations obtained in 2005 June-July of
unidentified, high-latitude INTEGRAL sources that were suspected to be obscured AGN
(PI: R. Sunyaev), I report
their basic properties from the ACIS-I images, and optical counterparts from the Digitized Sky
Survey. In each case, the brightest source in the Chandra image is chosen as the likely
identification. As was predicted, most (but not all) of these are low-redshift galaxies with hard
X-ray counterparts. However, several are also well detected at energies < 2 keV.
An R-band image of the galaxy counterpart to IGR J19473+4452 was obtained on the
MDM 2.4m telescope in 1.1" seeing on 2005 July 2. It shows a disk galaxy with a bright, slightly
resolved bulge.
Optical spectra are needed to determine the nature of the activity of all these counterparts.
Optical finding charts are linked below.
| IGR
| Obs ID
| Exp Time
| Chandra Position (J2000)
| Counts
| Counts |
| | (s)
| R.A. (h m s), Decl. (° ' ")
| (0.2-2 keV) | (2-10 keV) |
| ---------- |
| J05007-7047
| 6271 | 3415 | 05 00 46.09, -70 44 36.1 | 159 | 482 |
| J07563-4137
| 6272 | 3216 | 07 56 19.62, -41 37 42.2 | 186 | 525 |
| J10252-6829
| 6273 | 3633 | . . . | <26 | <12 |
| J11085-5100
| 6274 | 3630 | . . . | <17 | <10 |
| J12026-5349
| 6275 | 3220 | 12 02 47.62, -53 50 07.6 | 118 | 650 |
| J12391-1612*
| 6276 | 3213 | 12 39 06.29, -16 10 47.1 | 53 | 280 |
| J13091+1137
| 6277 | 3627 | 13 09 05.60, +11 38 03.0 | 3 | 103 |
| J19473+4452
| 6278 | 3592 | 19 47 19.36, +44 49 42.3 | 13 | 264 |
| ---------- |
| * Probably XSS J1238.9-1614
(RXTE slew survey, Revnivtsev, M., et al. 2004, A&A, 418, 927
)
|
| CXOU |
Optical and Other Identification |
| ---------- |
| J050046.0-704436 |
USNO B1.0 star: B=14.92, R=15.30, I=15.26 |
| J075619.6-413742 |
IRAS 07545-4129, pair or disturbed galaxy? |
| J120247.6-535007 |
IRAS 12002-5333 (z=0.0279) |
| J123906.2-161047 |
LEDA 170194 (z=0.0367) = NVSS J123906.3-161046** |
| J130905.6+113803 |
NGC 4992 (z=0.0251) |
| J194719.3+444942 |
2MASX J19471938+4449425 |
| ---------- |
| ** 39.4 mJy @ 21 cm (source correction to Bassani et al.
ATEL #537)
|
Optical Finding Charts
