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Date: Sat, 3 Apr 1993 19:22:34 +0200
From: granslo@argo.uio.no
Subject: Observations SN 1993J - Report No. 02
PHOTOMETRIC OBSERVATIONS OF SUPERNOVA 1993J IN M81 - REPORT NO. 2
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The following observations are available by 1993 April 3:
YYYY MM DD.DDD MAGN MS SEQ OBSERVER (INSTRUMENT)
1993 03 26. <14.0 mv Pujol, P.; Ripero, J.
1993 03 28.86 11.8 mv Garcia, F. (25-cm f/3.9 refl.)
1993 03 28.89 11.6 C Rodriguez, (20-cm f/5 refl. + ST-4 CCD)
1993 03 29.01 11.3 mv Garcia, F.
1993 03 29.019 11.2 C Ulfheden,P.; Hamberg,I. (15-cm refl+ST-6 CCD)
1993 03 29.82 11.2 mv Pujol, P.
1993 03 29.82 11.0 mv Ripero, J.
1993 03 29.82 11.0 C Rodriguez, D.
1993 03 29.95 11.1 mv Garcia, F.
1993 03 30.006 11.0: C TB Solberg, R. (40.6-cm refl. + ST-6 CCD)
1993 03 30.25 10.2 V Hartwick, F. et al. (50-cm refl. + CCD)
1993 03 30.537 10.4 mv Yamada, M.
1993 03 30.845 10.3: mv TA Schmeer, P. (20.3-cm SCT)
1993 03 30.865 10.6 mv Poyner, G. (40-cm refl.)
1993 03 30.90 11.0 mv GP Midtskogen, O. (31.6-cm refl.)
1993 03 30.906 10.5 mv TB Schmeer, P. (20.3-cm SCT)
1993 03 30.916 10.6 mv Poyner, G. (40-cm refl.)
1993 03 30.93 10.5 mv TA Bengtsson, H. (15-cm refl.)
1993 03 30.989 10.6 mv Poyner, G. (40-cm refl.)
1993 03 31.13 10.6 mv GP Midtskogen, O. (31.6-cm refl.)
1993 03 31.424 10.5 mv Yamada, M.
1993 03 31.440 10.5 mv Yamada, M.
1993 03 31.576 10.5 mv TB Kato, T.
1993 04 01.055 10.4 mv Beauchamp, D. (20.3-cm SCT, 100x)
1993 04 01.465 10.4 mv Iida, M.
1993 04 01.538 10.4 TB Kato, T.
1993 04 01.604 11.0 V Kiyota, S.
1993 04 01.622 10.4 mv TB Watanabe, Y.
1993 04 01.660 11.21 V Okyudo, M. (CCD)
1993 04 01.750 11.0 mv Koyama, H.
1993 04 01.785 10.8 p Koyama, H. (GX 3200, no filter)
1993 04 01.803 10.7 mv AC Schmeer, P. (20.3-cm SCT)
1993 04 02. 10.6 mv TB Kratz, D. (20-cm f/3.5 refl.)
1993 04 02.535 11.50 V Kato, T. (CCD)
1993 04 02.585 11.1 mv Watanabe, M.
1993 04 02.608 11.5 mv Sakuma, S.
1993 04 02.716 10.6 mv Abe, S.
1993 04 02.843 11.3 mv Poyner, G. (40-cm refl.)
1993 04 02.867 11.3 mv TB Granslo, B. H. (20.3-cm SCT, 123x)
1993 04 02.95 11.5 mv TA Bengtsson, H. (15-cm refl.)
1993 04 03.011 11.2 mv TB Granslo, B. H. (20.3-cm SCT, 123x)
1993 04 03.448 11.3 mv Takahashi, S.
1993 04 03.574 11.5 mv Takahashi, S.
Observers:
S. Abe (Chiba, Japan); Hans Bengtsson (Hisings Backa, Sweden);
Dominique Beauchamp (Quebec City, Quebec, Canada); Francisco Garcia Diaz
(Lugo, Spain); Bjoern H. Granslo (Fjellhamar, Norway);
F. D. A. Hartwick et al. (Climenhaga Observatory at Univ. of Victoria);
M. Iida (Nagano, Japan); Taichi Kato (Kyoto, Japan);
S. Kiyota (Ibaragi, Japan); H. Koyama (Tokyo, Japan);
David Kratz (Hampton, VA, USA); M. Okyudo, (Nishiharima observatory,
Hyogo, Japan); Gary Poyner (Birmingham, England); F. Pujol (Madrid,
Spain); D. Rodriguez (Madrid, Spain); J. Ripero (Madrid, Spain);
S. Sakuma (Kawasaki, Kanagawa, Japan); Patrick Schmeer (Bischmisheim,
Germany); Rune Solberg (Nova observatory, Norway); S. Takahashi (Shiga,
Japan); Peter Ulfheden, Ivar Hamberg (Stockholm, Sweden); M. Watanabe
(Toyama, Japan); Yasunori Watanabe (Kanagawa, Japan); M. Yamada
(Ishikawa, Japan).
Time system is Universal Time. Magnitude systems: mv = visual, V =
Johnson V, C = unfiltered CCD magnitude, p = photographic. Sequences:
AC = AAVSO chart, GP = Guide Star Photometric Catalog, TA = The
Astronomer, TB = Thompson/Bryan Supernova Search Chart.
It should be noted that the exposures by Ulfheden and Hamberg on March
29 and Solberg on March 30 were made before discovery announcement.
The supernova reached magnitude mv = 10.5 on March 31, but it has faded
rapidly during the last two nights. The latest estimates place it near
magnitude 11.5. This is quite consistent with the fade in the UBVRI
system as reported by Michael Richmond (Princeton University).
Kind regards,
Bjorn H. Granslo
bgranslo@astro.uio.no
PS. Thanks for the observations!
Return to the Daisaku Nogami
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