CHANDRA detection of 16 new X-ray sources

A. Küpcü Yoldaş; Ş. Balman

doi:10.1051/0004-6361:20011837

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Volume 384 / No 1 (MarchII 2002)

A&A, 384 1 (2002) 190-194

Abstract

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Issue		A&A Volume 384, Number 1, MarchII 2002


Page(s)		190 - 194
Section		Interstellar and circumstellar matter
DOI		https://doi.org/10.1051/0004-6361:20011837
Published online		15 March 2002

A&A 384, 190-194 (2002)

CHANDRA detection of 16 new X-ray sources

A. Küpcü Yoldaş and Ş. Balman

Department of Physics, Middle East Technical University, Inönü Bulvarı, 06531 Ankara, Turkey

Corresponding author: A. Küpcü Yoldaş, aybuke@astroa.physics.metu.edu.tr

Received: 6 November 2001
Accepted: 20 December 2001

Abstract

We have detected 18 sources over 6 σ threshold within two regions 8 $\farcm$ 3 $\times$ 16 $\farcm$ 9 and 8 $\farcm$ 3 $\times$ 33 $\farcm$ 6 in the vicinity of the point with $\alpha=$ 03^h31^m02 $\fs$ 45 (J2000) and $\delta=$ +43°47′58 $\farcs$ 5 (J2000) using a CHANDRA ACIS (S+I) observation. Two of the sources were detected before with ROSAT HRI and one source could be closely identified with a star in the optical catalog, USNO A-2. We have also studied source spectra applying four spectral models to the data. Most of the sources can be classified as Cataclysmic Variable, Low Mass X-ray Binary or single star candidates due to their spectral characteristics and luminosities. We also searched for the extragalactic origin for these 18 sources. The source count rates vary between 5.8 $\times 10^{-4}$ –4.7 $\times 10^{-3}$ counts/s. Due to low count rates temporal characteristics of the sources can not be studied effectively.

Key words: X-rays: stars / X-rays: galaxies / X-rays: binaries / stars: cataclysmic variables, neutron

© ESO, 2002

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