========================================================================== J/A+A/506/1055 Hot stars observed by XMM-Newton. I. (Naze, 2009) The following files can be converted to FITS (extension .fit or fit.gz) table1.dat table5.dat ========================================================================== Query from: http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=J/A+A/506/1055 ==========================================================================
drwxr-xr-x 30 cats archive 4096 Jan 29 2012 [Up] drwxr-xr-x 2 cats archive 4096 May 12 09:59 [TAR file] -rw-r--r-- 1 cats archive 472 Dec 30 2009 .message -r--r--r-- 1 cats archive 12594 Dec 30 2009 ReadMe -rw-r--r-- 1 cats archive 601 Dec 30 2009 +footg5.gif -rw-r--r-- 1 cats archive 3533 Dec 30 2009 +footg8.gif -r--r--r-- 1 cats archive 137687 Aug 11 2009 table1.dat [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 92779 Aug 11 2009 table5.dat [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe : J/A+A/506/1055 Hot stars emitting in X-ray. I. (Naze, 2009) ================================================================================ Hot stars observed by XMM-Newton. I. The catalog and the properties of OB stars. Naze Y. <Astron. Astrophys. 506, 1055 (2009)> =2009A&A...506.1055N ================================================================================ ADC_Keywords: X-ray sources ; Stars, early-type Keywords: X-rays: stars - stars: early-type - catalogs Abstract: Following the advent of increasingly sensitive X-ray observatories, deep observations of early-type stars became possible. However, the results for only a few objects or clusters have until now been reported and there has been no large survey comparable to that based upon the ROSAT All-Sky Survey (RASS). A limited survey of X-ray sources, consisting of all public XMM observations (2XMMi) and slew survey data (XMMSL1), is now available. The X-ray counterparts to hot, massive stars have been searched for in these catalogs. About 300 OB stars were detected with XMM. Half of them were bright enough for a spectral analysis to be possible, and we make available the detailed spectral properties that were derived. The X-ray spectra of O stars are represented well by low (<1keV) temperature components and seem to indicate that an absorption column is present in addition to the interstellar contribution. The X-ray fluxes are well correlated with the bolometric fluxes, with a scatter comparable to that of the RASS studies and thus larger than found previously with XMM for some individual clusters. These results contrast with those of B stars that exhibit a large scatter in the L_X-L_BOL relation, no additional absorption being found, and the fits indicate a plasma at higher temperatures. Variability (either within one exposure or between multiple exposures) was also investigated whenever possible: short-term variations are far more rare than long-term ones (the former affects a few percent of the sample, while the latter concerns between one third and two thirds of the sources). Description: Table 1 is a catalog of X-ray emitters amongst early-type stars following a correlation between the Reed and 2XMMi catalogs - note that line 1 summarizes the column info, lines 2, 38, 130 gives a title for the O, B, and WR stars with good quality flag and lines 138, 237 and 308 do the same for sources with possibly spurious sources. In each category (O/B/WR + good/spurious), the sources are ranked by increasing RA. Table 5 gives the spectral properties of the brightest sources (models of the type wabs(interstellar)*wabs(additional)*sum of 3 mekal max. Undetermined values are quoted as "---". See paper for more details.