SUMMARY OF PROPOSAL 63002
MPE
GARCHING
BAVARIA GERMANY 85740
Tel: 89 3299 3345 Fax: 89 3299 3865
Medium: CD ROM
Subject: STARS
X-RAY ECLIPSES IN ALGOL
ABSTRACT
We propose to observe the eclipsing binary Algol (consisting of a B-type primary and K-type secondary) during four secondary optical minima. Since the B-type primary component in this system is X-ray dark, one expects X-ray eclipses to occur, if the corona around the K-star is spatially confined. Such eclipses were seen once with ROSAT and ASCA, but not with EXOSAT. The purpose of the proposed observations is to check whether secondary eclipse is a persistent feature of Algol's X-ray light curve or not. The observations are very well suited to both the ASCA orbit and the ASCA mode of observations.
CO-INVESTIGATORS
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)ALGOL | 1 | 47.0417 | 40.9572 | 96 ks | N | Y | P | 3.00000 | 4 |
TARGET 1
4 SEPARATE OBSERVATIONS OF 20 HOURS ELAPSED TIME CENTERED ON SECONDARY ECLIPSE ARE TO BE PERFORMED. THE PRECISE ECLIPSES CHOSEN DO NOT MATTER, A LIST OF POSSIBLE ECLIPSES IS IN PROPOSAL.