2005A&A...438..949T


Query : 2005A&A...438..949T

2005A&A...438..949T - Astronomy and Astrophysics, volume 438, 949-955 (2005/8-2)

A search for very active stars in the Galaxy. First results.

TSAREVSKY G., DE FREITAS PACHECO J.A., KARDASHEV N., DE LAVERNY P., THEVENIN F., SLEE O.B., STATHAKIS R.A., BARSUKOVA E., GORANSKY V. and KOMBERG B.

Abstract (from CDS):

We report the first results of a systematic search near the plane of the Galaxy for so-called very active stars (VAS), which are characterized by a hard X-ray spectrum and activity in the radio domain. Candidates with hard X-ray binary-like spectra have been selected from the Bright ROSAT Source Catalogue in the Zone of Avoidance (|b|<20°) and were tentatively identified in GB6/PMM/NVSS radio surveys. Most of them were observed with the ATCA and VLA. Precise radio coordinates have led to unambiguous optical identification for 60 candidates, and a sub-sample of five of them has been observed with the VLT. Also some discovery and confirmatory spectra were obtained with the AAT (4-m) and BTA (6-m). Spectroscopy with moderate dispersion, made with the FORS1 spectrograph of the VLT has revealed two stellar objects (one of them, VASC J1628-41, is definitively a binary VAS), one new AGN and two featureless spectrum sources. One of these objects, VASC J1353-66, shows marginal evidence of proper motion, which, if confirmed, would imply the discovery of a new type of galactic source.

Abstract Copyright:

Journal keyword(s): stars: activity

Nomenclature: Table 1: VASC JHHMM+DD N=5. Text: VASC J1626-33WW (Nos SW, NE).

Simbad objects: 9

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Number of rows : 9
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NAME Great Attractor SCG 10 32 -46.0           ~ 528 0
2 ATPMN J135340.1-663957 Bla 13 53 40.14159 -66 39 57.6631           ~ 29 0
3 1RXS J162620.7-332925 * 16 26 20.7 -33 29 25           ~ 2 0
4 [CGI2005] 16 XB* 16 26 22.9366825536 -33 29 34.493249148   17.4 16.4     KOIII 2 1
5 VASC J1628-41 RS* 16 28 47.2858950264 -41 52 38.990389044     13.403   10.945 K3III 12 0
6 Granat 1734-292 Sy1 17 37 28.3811310912 -29 08 02.119558272           ~ 132 0
7 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13449 0
8 1RXS J175715.6-414914 Sy1 17 57 17.66 -41 49 18.8           ~ 3 1
9 4FGL J1942.7+1033 BLL 19 42 47.4841298280 +10 33 27.102911688           ~ 44 1

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2023.02.02-18:44:42

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