SUMMARY OF PROPOSAL 62001
UNIVERSITY OF MARYLAND
COLLEGE PARK
MARYLAND USA 20742
Tel: 301-405-1563 Fax: 301-314-9067
Medium: 2GB8MM
Subject: COSMIC X-RAY BACKGROUND AND DEEP SURVEYS AND OTHER
X-RAY SPECTRAL AND PHOTOMETRIC EVOLUTION OF COMETS
ABSTRACT
Recent observations of comet Hyakutake and others have provided evidence of high energy emissions from comets. These observations showed positional detail, but did not have adaquate spectral resolution to discern the nature of physical processes responsible for X-ray emission. While some processes could be ruled out by X-ray broad band photometric behavior, thermal bremsstrahlung, ion charge transfer, or solar wind interactions could not. We propose to observe 2 comets during their perihelion approach using SIS to obtain data to determine the process responsible for emission. We will monitor our primary candidate over 9 days for transient emission. By observing 2 comets successively we hope to determine if xray emission dependends on each comet's characteristics or on solar activety.
CO-INVESTIGATORS
| CO-I NAME | INSTITUTE | COUNTRY |
|---|
| JAMES BAUER | IFA, UNIV. OF HAWAII | USA |
| KAREN MEECH | IFA, UNIV. OF HAWAII | USA |
| PATRICK HENRY | IFA, UNIV. OF HAWAII | USA |
| NAOTO KOBAYASHI | IFA AND KYOTO UNIV. | JAPAN |
| YANGA FERNANDEZ | UNIV. OF MARYLAND | USA |
| KATSUJI KOYAMA | KYOTO UNIV. | JAPAN |
| ROBERT PETRE | GSFC | USA |
| BARRY KELLETT | LEICESTER UNIV. | UK |
| ROBERT BINGHAM | LEICESTER UNIV. | UK |
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)P/TEMPEL-TUTTLE | 2 | 36.0329 | 70.7829 | 60 ks | Y | N | P | 0.10000 | 9 |
TARGET 1
OBS MUST TAKE PLACE AS SOON AS TARGET ENTERS ASCA'S FOV. TO KEEP COMETS IN FOV, WE REQUEST 5 SUBSEQUENT RASTER OFFSETS/POINTING. EACH OBS IS 20 KSEC, SPACED BY 1 DAY; 9 POINTINGS FOR TARGET 1.
COORDINATED OBSERVATION: START: Jan 20,1998 at 00STOP: Jan 28,1998 at 60