2010A&A...516A.106N


C.D.S. - SIMBAD4 rel 1.7 - 2020.09.18CEST11:04:23

2010A&A...516A.106N - Astronomy and Astrophysics, volume 516, A106-106 (2010/6-3)

Unveiling the nature of IGR J16493-4348 with IR spectroscopy.

NESPOLI E., FABREGAT J. and MENNICKENT R.E.

Abstract (from CDS):

The International Gamma-Ray Astrophysics Laboratory (INTEGRAL) is discovering a large number of new hard X-ray sources, many of them being HMXBs. The identification and spectral characterization of their optical/infrared counterparts is a necessary step in undertaking a detailed study of these systems. In a previous paper, we presented spectral analyses and classifications of six newly discovered INTEGRAL sources. In this paper, we extend the analysis to IGR J16493-4348. We used the ESO/VLT ISAAC spectrograph to observe the proposed IR counterpart to the source, obtaining a Ks medium-resolution spectrum (R=500) with a signal-to-noise ratio (S/N)>150. We classified the source by comparing with published atlases. We spectrally classified the source as a B0.5-1 supergiant and estimated its interstellar extinction. We compared the extinction derived from X-ray data with effective interstellar extinction obtained from our data, discussing the absorption component associated with the circumstellar environment.

Abstract Copyright:

Journal keyword(s): X-rays: binaries - binaries: symbiotic - accretion, accretion disks - infrared: stars

Simbad objects: 8

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Number of rows : 8

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 NAME Nor Arm PoG 16 00 -50.0           ~ 343 0
2 2MASS J16463526-4507045 HXB 16 46 35.2592332854 -45 07 04.609816032   15.2       O9.5Ia 87 1
3 2MASS J16480656-4512068 HXB 16 48 06.56 -45 12 06.8           O8.5Iab 119 2
4 HD 326277 Ro* 16 49 13.3063391008 -43 55 27.921460975   11.02 10.168   9.232 K0IV 12 0
5 PSR J1649-4349 Psr 16 49 20.42 -43 49 22.2           ~ 18 0
6 2MASS J16492695-4349090 HXB 16 49 26.95 -43 49 09.0           B0.5Ib 46 0
7 [KRL2007b] 332 HXB 18 41 00.43 -05 35 46.5           B1Ib 115 1
8 INTEGRAL1 111 HXB 19 14 04.2269997048 +09 52 58.398334234   18.6 16.4     B0.5I 88 0

    Equat.    Gal    SGal    Ecl

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2020.09.18-11:04:23

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