EDP Sciences
Free Access
Issue
A&A
Volume 373, Number 2, July II 2001
Page(s) 438 - 446
Section Extragalactic astronomy
DOI https://doi.org/10.1051/0004-6361:20010595


A&A 373, 438-446 (2001)
DOI: 10.1051/0004-6361:20010595

The X-ray view of M 33 after ROSAT

F. Haberl and W. Pietsch

Max-Planck-Institut für extraterrestrische Physik, Giessenbachstraße, 85748 Garching, Germany

(Received 28 February 2001 / Accepted 14 April 2001 )

Abstract
We present a catalogue of 184 X-ray sources within 50´of the nucleus of the local group spiral galaxy M 33. The catalogue is derived from an analysis of the complete set of ROSAT archival data pointed in the direction of M 33 and contains X-ray position, existence likelihood, count rates and PSPC spectral hardness ratios. To identify the sources the catalog was correlated with previous X-ray catalogues, optical and radio catalogues. In addition sources were classified according to their X-ray properties. We find seven candidates for supersoft X-ray sources, of which two may be associated with known planetary nebulae in M 33. The majority of X-ray detected supernova remnants is also detected at radio frequencies and seen in optical lines. The low overall X-ray detection rate of optically selected SNRs can probably be attributed to their expansion into interstellar matter of low density.


Key words: galaxies: individual: Messier 33 -- galaxies: stellar content -- stars: variables: general -- X-rays: stars -- catalogs

Offprint request: F. Haberl, fwh@mpe.mpg.de

SIMBAD Objects
Tables at the CDS



© ESO 2001

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.