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Eye in the sky: a new look at the seyfert connection
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Helfand, David J. |
| Copyright Year | 1997 |
| Description | Observations obtained under this ASCA grant have been fully reduced. We have also extracted data from the ROSAT archive to complement the ASCA spectrum, and demonstrate that the source is time variable, a key clue to its nature. These results are nearly ready for submission. To reconcile the high soft X-ray luminosity of IRAS 00317-2142 with its properties at other wavelengths, we observed the galaxy with the ASCA satellite on 12/12/95 for 37 ks with these SIS and 41 ks with the GIS; a fit to the combined spectra. In combination with an archived 9.3 ks ROSAT PSPC observation, obtained 6/23/92 these data reveal significant spectral and flux variability. Although somewhat prosaic, these results are very significant in the context of the so called 'narrow-line X-ray galaxies' which are being discovered with increasing frequency in surveys of faint ROSAT sources. It may well be that these too are unremarkable and are included in current counts of Seyfert galaxies, meaning they are not the long-sought new component of the cosmic X-ray background. |
| File Size | 148219 |
| Page Count | 6 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19980007585 |
| Archival Resource Key | ark:/13960/t92858b5r |
| Language | English |
| Publisher Date | 1997-10-01 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Surveys Rosat Mission Seyfert Galaxies Data Acquisition Luminosity Spectra Infrared Astronomy Satellite Frequencies Background Radiation X Ray Sources Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
