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Date: Tue, 3 Aug 93 11:16:47 IST
From: iiap!tpp@iiap.ernet.in (Dr.T.P.Prabhu)
Subject: SN93J
Dear Dr. Kato,
I had mailed the following data on SN93J in BVRI(Cousins) bands some time
back but it bounced. I am trying again. I would like to receive your
updated photometry for beyond May 15. Since we are using uucp protocol
by remote login from the nearest node, we can at present access files
of size NOT MORE THAN 40kbytes at a time. May I request you to send the
data in smaller files?
Best regards,
Tushar Prabhu
tpp@iiap.ernet.in
3 Aug 1993
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Supernova 1993J: CCD photometric results.
Y. D. Mayya, T. P. Prabhu, Ram Sagar, A. Subramaniam, A. K. Pati,
Indian Institute of Astrophysics, Bangalore 560034, India
K. P. Singh, Tata Institute of Fundamental Research, Bombay 400005, India
Gopal-Krishna, National Centre for Radio Astrophysics, Pune 411007, India
Telescope : 2.3m reflector, Vainu Bappu Observatory, Kavalur, India
Instrument: Prime Focus CCD camera with GEC 8603 chip
Method : Differential photometry with star B as standard. Correction
for colour coefficient in transformation equations is made.
Date V B-V V-R V-I
1993
APR 14.68 10.957 0.521 0.390
APR 15.67 10.898 0.497 0.397
APR 16.68 10.865 0.530 0.425
APR 17.65 10.869 0.630 0.406
APR 18.62 10.847 0.576 0.396
APR 19.62 10.885 0.675 0.426
APR 21.61 10.976 0.780 0.473 0.520
APR 22.59 11.049 0.876 0.475
APR 24.60 11.267 0.935 0.557 0.637
MAY 21.61 12.473 1.269 0.686
MAY 23.64 12.538 1.392 0.707
Star B 11.900 0.500 0.300 0.600 Comparison; assumed mag
+/-0.018 +/-0.023 +/-0.008 +/-0.008 rms of correction
Star A 11.407 0.539 0.306 0.604 Check star; derived mag
+/-0.016 +/-0.021 +/-0.022 0.010 rms of derived mag
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