ROSAT Observation of the Decline of V838 Herculis (Nova Herculis 1991)
Abstract
A long ROSAT observation of the very fast, very large amplitude nova V838 Her 19 months after outburst reveals a marginal detection of the source at a count rate of 7.8(+/- 2.9) x 10-4 counts/sec, with all of the flux in the energy range of 0.6 to 1.3 keV. A short archive observation at 1 yr past outburst is consistent with this low flux level. These data provide the first real limit of less than a year for the turnoff of the white dwarf remnant envelope in a fast nova.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- July 1994
- DOI:
- 10.1086/174370
- Bibcode:
- 1994ApJ...429..857S
- Keywords:
-
- Cataclysmic Variables;
- Eclipses;
- Hercules Nova;
- Light Curve;
- Stellar Spectra;
- X Ray Imagery;
- Apertures;
- Position Sensing;
- Proportional Counters;
- Rosat Mission;
- Astrophysics;
- STARS: NOVAE;
- CATACLYSMIC VARIABLES;
- STARS: INDIVIDUAL CONSTELLATION NAME: V838 HERCULIS;
- X-RAYS: STARS