SUMMARY OF PROPOSAL 82011
NASA'S GODDARD SPACE FLIGHT CENTER
GREENBELT
MD USA 20771
Tel: 301 286 6962 Fax: 301 286 1684
Medium: CD ROM
Subject: STARS
X-RAY MONITORING OF THE ECLIPSING RS CVN SYSTEM AR LAC
ABSTRACT
AR Lac is an eclipsing RS CVn binary system of 2 days orbital period which has been extensively studied by most X-ray satellites since Einstein, but typically in observations that are similar or shorter in length to its orbital period. This limitation has compromised previous attempts to do eclipse-mapping studies of the spatial distribution of the coronal plasma in this system, because of the difficulty of distinguishing between transient events and persistent spatial structures. In this proposal, we ask for 360 ksec of exposure time so as to observe 5 orbital periods of AR Lac which will allow us to eliminate this uncertainty. We will also study AR Lac's X-ray flare frequency, and do time-resolved (e.g., phase-binned) spectroscopy.
CO-INVESTIGATORS
| CO-I NAME | INSTITUTE | COUNTRY |
|---|
| NICHOLAS WHITE | GSFC | USA |
| THEODORE SIMON | UNIV. OF HAWAII | USA |
| MARTIN STILL | GSFC | USA |
| ANDREW COLLIER-CAMERON | UNIV. OF ST. ANDREWS | UK |
| KULINDER PAL SINGH | TIFR | INDIA |
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)AR LAC | A | 332.1700 | 45.7422 | 400 ks | N | N | P | 1.50000 | 1 |