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A ROSAT PSPC catalogue of X-ray sources in the LMC region
We analyzed more than 200 ROSAT PSPC observations in a 10 by 10 degreefield centered on the Large Magellanic Cloud (LMC) and performed between1990 and 1994 to derive a catalogue of X-ray sources. The list contains758 sources with their X-ray properties. From cross-correlations of thePSPC catalogue with the SIMBAD data base and literature searches we givelikely identifications for 144 X-ray sources based on positionalcoincidence, but taking into account X-ray properties like hardnessratios and source extent. 46 known sources are associated with supernovaremnants (SNRs) and candidates in the LMC, most of them already detectedby previous X-ray missions. Including the new candidates from\cite[Haberl & Pietsch (1999)]{HP99} based on variability studies ofthe sources in our PSPC catalogue, the number of X-ray binaries in theLMC increased to 17 and that of the supersoft sources (SSSs) to 9. Theremaining ~ 50% of the identified sources comprise mainly foregroundstars (up to 57) and background extragalactic objects (up to 15). Theoften distinguished X-ray properties of the different source types wereused for a first classification of new, unknown X-ray sources. Eight newPSPC sources are classified as SNRs from their hardness ratios and onepromising new SNR candidate with extended X-ray emission is foundfurther north than all known SNRs. Three soft X-ray sources havehardness ratios compatible to those of the known SSSs. A selection onhardness ratios and X-ray to optical flux ratio further suggests 27foreground stars and 3 AGN.
| The Large Magellanic Cloud - The third list of stars that belong to the Large Magellanic Cloud and a list of galactic stars
Abstract image available at:http://adsabs.harvard.edu/abs/1981A&AS...46...13F
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Masa |
| Sað Açýklýk: | 05h40m55.76s |
| Yükselim: | -72°16'28.3" |
| Görünürdeki Parlaklýk: | 8.568 |
| Uzaklýk: | 93.458 parsek |
| özdevim Sað Açýklýk: | -2 |
| özdevim Yükselim: | -28.6 |
| B-T magnitude: | 9.213 |
| V-T magnitude: | 8.622 |
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