SUMMARY OF PROPOSAL 52082

PROFESSOR WALTER H.G. LEWIN
LEWIN@SPACE.MIT.EDU

M.I.T.
77 MASSACHUSETTS AVE. #37-627
CAMBRIDGE
MA USA 02139
Tel: (617)253-4282 Fax: (617)253-0861
Medium: 2GBDAT
Subject: SUPERNOVA REMNANTS AND GALACTIC DIFFUSE EMISSION

OBSERVATIONS OF SN1995N


ABSTRACT

Three days ago (Aug 2), SN1995N was detected for the first time in X-rays with the ROSAT satellite's HRI (Lewin, Zimmermann & Aschenbach, IAUC submitted Aug 5), making it only the seventh supernova to be detected in the X-ray band. As a logical consequence, we propose observations of SN1995N with ASCA's superior energy resolution and sensitivity at higher energies. Such observations may allow us to determine the neutral hydrogen absorption column density of the front and reverse shocks and thus the thickness of the radiatively cooled layer between them, providing important information on the progenitor's circumstellar environment. Coordinated observations at radio wavelengths with the VLA are underway.

CO-INVESTIGATORS
CO-I NAME INSTITUTE COUNTRY
D. FOXMITUSA
R. RUTLEDGEMITUSA
H.U. ZIMMERMANNMPEGERMANY
B. ASCHENBACHMPEGERMANY
S. VAN DYKBERKELEYUSA
K. WEILERNRLUSA
H. INOUEISASJAPAN
S. UNOISASJAPAN

TARGETS

TARGET NAMEPRIRADECTIMETCOFFGISSIS CNTOBS
1)SN1995N
3
222.3679-10.1706 100 ksN
Y
P
0.00250
2

TARGET 1

50 KSEC DURING JAN 22 - FEB 21, 1997 \\ 50 KSEC DURING JULY 15 - AUG 15, 1997