2007A&A...472..905D


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.24CET13:24:22

2007A&A...472..905D - Astronomy and Astrophysics, volume 472, 905-910 (2007/9-4)

INTEGRAL-ISGRI observations of the Cygnus OB2 region. Searching for hard X-ray point sources in a region containing several non-thermal emitting massive stars.

DE BECKER M., RAUW G., PITTARD J.M., SANA H., STEVENS I.R. and ROMERO G.E.

Abstract (from CDS):

We analyze INTEGRAL-ISGRI data in order to probe the hard X-ray emission (above 20keV) from point sources in the CygOB2 region and to investigate the putative non-thermal high-energy emission from early-type stars (Wolf-Rayet and O-type stars). Among the targets located in the field of view, we focus on the still unidentified EGRET source 3EG2033+4118 that may be related to massive stars known to produce non-thermal emission in the radio domain, and on the wide colliding-wind binary WR140. Using a large set of data obtained with the IBIS-ISGRI imager onboard INTEGRAL, we run the OSA software package in order to find point sources in the fully coded field of view of the instrument. Our data do not allow the detection of a lower-energy counterpart of 3EGJ2033+4118 nor of any other new point sources in the field of view, and we derive upper limits on the high-energy flux for a few targets: 3EGJ2033+4118, TeVJ2032+4130, WR140, WR146 and WR147. The results are discussed in the context of the multiwavelength investigation of these objects. The upper limits derived are valuable constraints for models aimed at understanding the acceleration of particles in non-thermal emitting massive stars, and of the still unidentified very-high gamma-ray source TeVJ2032+4130.

Abstract Copyright:

Journal keyword(s): stars: early-type - radiation mechanisms: non-thermal - X-rays: stars - gamma rays: observations - acceleration of particles

Simbad objects: 17

goto Full paper

goto View the reference in ADS

Number of rows : 17

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 2MASS J19493548+3012317 HXB 19 49 35.4840244577 +30 12 31.775034731   15.16 14.22 13.53 12.88 B0Ve 128 1
2 HD 226868 HXB 19 58 21.6758193269 +35 12 05.782512305 9.38 9.72 8.91 8.42   O9.7Iabpvar 3878 0
3 NAME Cyg A Sy2 19 59 28.35645829 +40 44 02.0966496   16.22 15.10     ~ 2082 2
4 HD 193793 WR* 20 20 27.9763345925 +43 51 16.289775091 6.90 7.25 6.85 4.58   WC7p+O5 645 1
5 3EG J2022+4317 gam 20 22 +43.3           ~ 20 0
6 TeV J2032+4130 gam 20 32.1 +41 34           ~ 115 0
7 [MT91] 213 Be* 20 32 13.1248987067 +41 27 24.343749507 13.12 13.08 11.266     B0Vp 205 0
8 V* V2246 Cyg HXB 20 32 15.2744631713 +37 38 14.839930326   22.16 19.41 17.32 15.18 B0Ve 374 0
9 V* V1521 Cyg HXB 20 32 25.78 +40 57 27.9           WN4/5-6/7 1754 2
10 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 773 0
11 MR 112 WR* 20 35 47.0859278605 +41 22 44.703520146     12.64 12.16   WC5-6e+O8 138 1
12 EM* AS 431 WR* 20 36 43.6 +40 21 08   17.04 14.89     WN8(h)+B0.5V 203 2
13 GSC 03588-00834 HXB 21 03 35.7101268891 +45 45 05.568943629   15.34 14.20 13.49 12.75 B0Ve 146 0
14 4C 50.55 Sy1 21 24 39.4 +50 58 25           ~ 84 1
15 RX J2133.7+5107 CV* 21 33 43.6347819631 +51 07 24.730222487   15.80       ~ 61 0
16 V* SS Cyg DN* 21 42 42.8034554117 +43 35 09.863763484 11.07 8.2 7.70     K5V 1204 1
17 V* V1341 Cyg LXB 21 44 41.1544523872 +38 19 17.065856122 15.00 15.13 14.68 15.00   A9III 1065 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2007A&A...472..905D and select 'bookmark this link' or equivalent in the popup menu


2020.02.24-13:24:22

© Université de Strasbourg/CNRS

    • Contact