2006A&A...451..587D


Query : 2006A&A...451..587D

2006A&A...451..587D - Astronomy and Astrophysics, volume 451, 587-602 (2006/5-4)

INTEGRAL survey of the Cassiopeia region in hard X rays.

DEN HARTOG P.R., HERMSEN W., KUIPER L., VINK J., IN'T ZAND J.J.M. and COLLMAR W.

Abstract (from CDS):

We report on the results of a deep 1.6 Ms INTEGRAL observation of the Cassiopeia region performed from December 2003 to February 2004. Eleven sources were detected with the imager IBIS-ISGRI at energies above 20keV, including three new hard X-ray sources. Most remarkable is the discovery of hard X-ray emission from the anomalous X-ray pulsar 4U 0142+61, which shows emission up to ∼150keV with a very hard power-law spectrum with photon index Γ=0.73±0.17. We derived flux upper limits for energies between 0.75 MeV and 30 MeV using archival data from the Compton telescope COMPTEL. In order to reconcile the very hard spectrum of 4U 0142+61 measured by INTEGRAL with the COMPTEL upper limits, the spectrum has to bend or break between ∼75keV and ∼750keV. 1E 2259+586, another anomalous X-ray pulsar in this region, was not detected. INTEGRAL and COMPTEL upper limits are provided. The new INTEGRAL sources are IGR J00370+6122 and IGR J00234+6144. IGR J00370+6122 is a new supergiant X-ray binary with an orbital period of 15.665±0.006-days, derived from RXTE All-Sky Monitor data. Archival BeppoSAX Wide-Field Camera data yielded four more detections. IGR J00234+6144 still requires a proper identification. Other sources for which INTEGRAL results are presented are high-mass X-ray binaries 2S 0114+650, γ Cas, RX J0146.9+6121 and 4U 2206+54, intermediate polar V709 Cas and 1ES 0033+595, an AGN of the BL-Lac type. For each of these sources the hard X-ray spectra are fitted with different models and compared with earlier published results.

Abstract Copyright:

Journal keyword(s): stars: neutron - stars: supergiants - stars: white dwarfs - X-rays: binaries - X-rays: general - gamma rays: observations

CDS comments: Abstract: IGR J00234+6144 misprint for IGR J00234+6141. Paragraph 6. IG R J00291+5434 is a probable misprint for IGR J00291+5934.

Simbad objects: 20

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Number of rows : 20
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 V* V1033 Cas CV* 00 22 57.6446300016 +61 41 07.571581872           ~ 53 0
2 SN 1572A SN* 00 25 21.5 +64 08 27           B8 1189 1
3 V* V709 Cas CV* 00 28 48.8267393856 +59 17 22.033767228     14.01     ~ 127 0
4 V* V1037 Cas LXB 00 29 03.06 +59 34 19.0           ~ 267 1
5 QSO B0033+595 BLL 00 35 52.554 +59 50 04.19     19.5 17.2   ~ 178 2
6 BD+60 73 HXB 00 37 09.6358153296 +61 21 36.487888344 9.79 10.231 9.697 9.589   BN0.5II-III 86 0
7 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 11178 1
8 * gam Cas HXB 00 56 42.5310945 +60 43 00.264089 1.18 2.29 2.39 2.32 2.40 B0.5IVpe 1209 0
9 V* V662 Cas HXB 01 18 02.6976641952 +65 17 29.829200388 12.27 11.99 11.14 10.33 9.58 B1Iae 272 0
10 IGR J01363+6610 HXB 01 35 49.8564591384 +66 12 43.284919428   14.724 13.271 12.825 11.37 B1IV-Ve 35 0
11 PSR J0146+6145 Psr 01 46 22.21 +61 45 03.8   28.100 25.620     ~ 572 0
12 EM* GGA 104 HXB 01 47 00.2124077208 +61 21 23.663788056 11.76 12.09 11.366 11.00 10.52 B1IIIe 191 0
13 M 1 SNR 05 34 30.9 +22 00 53           ~ 6202 1
14 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5268 0
15 PSR J1708-4008 Psr 17 08 49.0 -40 09 10           ~ 293 0
16 PSR J1841-0456 Psr 18 41 19.29 -04 56 11.4           ~ 267 1
17 4C -04.71 Rad 18 41 19.8 -04 56 06           ~ 327 3
18 BD+53 2790 HXB 22 07 56.2366802328 +54 31 06.408879888 9.4 10.11 9.84 9.64 9.43 O9.5Vep 210 0
19 2E 4673 HXB 23 01 08.14 +58 52 44.5           ~ 634 1
20 3C 461 BL? 23 23 24.000 +58 48 54.00     14.30     ~ 2797 1

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