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Date: Mon, 5 Apr 1993 15:11:31 +0200
From: granslo@argo.uio.no
Subject: Observations SN 1993J - Report No. 03
PHOTOMETRIC OBSERVATIONS OF SUPERNOVA 1993J IN M81 - REPORT NO. 3
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The latest results indicate that the fade has slowed down. The following
observations are available by 1993 April 5:
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YYYY MM DD.DDD MAGN MS SEQ OBSERVER NOTES SOURCE
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1985 01 21. 21 r Cohen, J. G. 1.5-m + CCD IAUC 5742
1985 01 21 21.9 g Cohen, J. G. 1.5-m + CCD IAUC 5742
1992 10 02. 20.0 R Salzer, J. et al. IAUC 5741
1993 02 24.687 <16.0 mv Kushida, R. Mail
1993 03 16.542 <15.0 mv Kushida, R. Mail
1993 03 16.90 20.0 R Prugniel, P. CCD IAUC 5742
-23.10
1993 03 21.667 <16.0 p Okamoto, Y. Mail
1993 03 25.60 <17 R van Driel, W. Kiso CCD IAUC 5737
1993 03 26.9 <14.0 mv Pujol, P.; IAUC 5731
Ripero, J.
1993 03 27.91 <16.0 p Merlin, J.-C. Ektachrome 400 IAUC 5740
1993 03 28.30 13.8 C Neely, A. CCD IAUC 5740
1993 03 28.86 11.8 mv Garcia, F. 25-cm f/3.9 refl. IAUC 5731
DISCOVERY OBSERVATION
1993 03 28.89 11.6 C Rodriguez, D. 20-cm f/5 refl.+ AAVSO 169
ST-4 CCD
1993 03 29.01 11.3 mv Garcia, F. AAVSO 169
1993 03 29.019 11.2 C Ulfheden, P.; 15-cm refl.+ ST-6 CCD Mail
Hamberg, I.
1993 03 29.1 11.8 C Rodriguez CCD IAUC 5731
1993 03 29.18 11.7 C Neely, A. W. CCD, corrected mag. IAUC 5742
1993 03 29.82 11.2 mv Pujol, P. IAUC 5731
1993 03 29.82 11.0 mv Ripero, J. AAVSO 169
1993 03 29.88 11.0 C Rodriguez, D. IAUC 5731
1993 03 29.95 11.1 mv Garcia, F. IAUC 5733
1993 03 30.006 11.0: C TB Solberg, R. 40.6-cm f/4.5 refl.+ Mail
ST-6 CCD
1993 03 30.1 11 mv Treffers, R. R. 0.8-m + CCD IAUC 5731
1993 03 30.25 10.2 V Hartwick,F.et al. 50-cm refl.+ CCD IAUC 5731
1993 03 30.538 10.4 mv TB Yamada, M. Mail
1993 03 30.845 10.3: mv TA Schmeer, P. 20.3-cm SCT IAUC 5733
1993 03 30.865 10.6 mv Poyner, G. 40-cm refl. Mail
1993 03 30.90 11.0 mv GP Midtskogen, O. 31.6-cm f/4.9 refl. Fax
1993 03 30.906 10.5 mv TB );hmeer, P. 20.3-cm SCT Mail
1993 03 30.916 10.6 mv Poyner, G. 40-cm refl. Mail
1993 03 30.93 10.5 mv TA Bengtsson, H. 15-cm refl. Mail
1993 03 30.94 10.5 mv Shanklin, J. D. IAUC 5736
1993 03 30.989 10.6 mv Poyner, G. 40-cm refl. Mail
1993 03 31.00 11.05 B Prugniel, P. 0.8-m + CCD, B-R=+0.3 IAUC 5736
1993 03 31.087 10.0 mv S Moore, D. 20-cm SCT, class 2 News
1993 03 31.1 10 mv Kohl, R. Independent discovery IAUC 5736
1993 03 31.13 10.6 mv GP Midtskogen, O. 31.6-cm refl. Fax
1993 03 31.13 10.5 mv Caimciolo, F. IAUC 5736
1993 03 31.2 10.7 R Salzer, J. et al. IAUC 5741
1993 03 31.21 10.81 V Neely, A. W. Corrected mag. IAUC 5742
1993 03 31.21 10.4 C Neely,A.W. CCD, corrected mag. IAUC 5742
1993 03 31.424 10.5 mv TB Yamada, M. Mail
1993 03 31.440 10.5 mv TB Yamada, M. Mail
1993 03 31.576 10.5 mv TB Kato, T. Mail
1993 03 31.84 10.5 mv Zanotta, M. V.; IAUC 5737
Pesci, S .
1993 03 31.961 10.97 V Hanzl, D. B-V=+0.33 IAUC 5742
1993 03 31.972 11.06 V Sostero, G. et al. B-V=-0.35 IAUC 5741
1993 04 01.00 11.40 B Prugniel, P. (CCD) B-R=+0.45 IAUC 5741
1993 04 01.055 10.4 mv Beauchamp, D. 20.3-cm SCT. Class 2 Mail
1993 04 01.08 10.7 mv Schmeer, P. IAUC 5740
1993 04 01.18 11.08 V Neely, A. W. Corrected mag. IAUC 5742
1993 04 01.18 11.0 C Neely, A. W. CCD, corrected mag. IAUC 5742
1993 04 01.453 10.5 mv TB Takahashi, S. Mail
1993 04 01.465 10.5 mv TB Iida, M. Mail
1993 04 01.538 10.4 mv TB Kato, T. Mail
1993 04 01.58 10.8 p TB Kushida 40-cm +Fuji SuperG400 Mail
1993 04 01.604 11.0 mv TB Kiyota, S. Mail
1993 04 01.622 10.4 mv TB Watanabe, Y. Mail
1993 04 01.632 11.2 mv Shioi, H. Mail
1993 04 01.633 10.5 p Kushida, Y. Tri-X, no filter Mail
1993 04 01.660 11.21 V Okyudo, M. CCD Mail
1993 04 01.726 11.0 mv TB Watanabe, T. Mail
1993 04 01.750 11.0 mv TB Koyama, H. Mail
1993 04 01.785 10.8 p TB Koyama, H. GX 3200, no filter Mail
1993 04 01.795 10.5 mv TB Hirosawa, K. Mail
1993 04 01.803 10.7 mv AC Schmeer, P. 20.3-cm SCT Mail
1993 04 01.81 10.5 mv Vanmunster, T. IAUC 5740
1993 04 01.86 11.32 V Mikolajewski, M. B-V=0.26, V-R=0.37 IAUC 5742
V-I=0.37
1993 04 01.816 11.19 V Hanzl, D. B-V=0.32 IAUC 5742
1993 04 02. 10.6 mv TB Kratz, D. 20-cm f/3.5 refl. News
1993 04 02.15 11.45 V Neely, A. W. Corrected mag. IAUC 5742
1993 04 02.15 11.5 C Neely, A. W. CCD, corrected mag. IAUC 5742
1993 04 02.439 11.0 mv TB Yamada, M. Mail
1993 04 02.453 10.9 mv TB Takahashi, S. Mail
1993 04 02.494 11.50 V Kato, T. (CCD) CCD Mail
1993 04 02.585 11.1 mv TB Watanabe, M. Mail
1993 04 02.608 11.5 mv TB Sakuma, S. Mail
1993 04 02.716 10.6 mv TB Abe, S. Mail
1993 04 03.831 11.0 mv TB Dahle, H. 20.3-cm SCT, 200x,
AAVSO mags, class 1
1993 04 03.837 11.2 mv TB Dahle, H. 20.3-cm SCT, 200x;
Sandage mags.,class 2
1993 04 02.843 11.3 mv Poyner, G. 40-cm refl. Mail
1993 04 02.867 11.3 mv TB Granslo, B. H. 20.3-cm SCT, 123x,
class 2 (hazy sky)
1993 04 02.95 11.5 mv TA Bengtsson, H. 15-cm refl. Mail
1993 04 03.011 11.2 mv TB Granslo, B. H. 20.3-cm SCT, 123x,
class 2 (hazy sky)
1993 04 03.299 11.75 V GS Robosope 40.6-cm refl.+512x512 Mail
(Univ. Indiana) Tektronix CCD
1993 04 03.342 11.78 V GS Robosope Mail
1993 04 03.369 11.76 V GS Robosope Mail
1993 04 03.385 11.77 V GS Robosope Mail
1993 04 03.448 11.3 mv TB Takahashi, S. Mail
1993 04 03.555 11.76 V Kato, Taichi Mail
1993 04 03.561 12.09 B Kato, Taichi Mail
1993 04 03.574 11.15 Ic Kato, Taichi Mail
1993 04 03.574 11.5 mv TB Takahashi, S. Mail
1993 04 03.66 11.8 mv TB Kushida, R. Mail
1993 04 03.68 11.9 mv TB Kushida, Y.
1993 04 03.862 11.4 mv TA Westlund, M. 20.3-cm SCT Mail
1993 04 04.029 11.6 mv TB Schmeer, P. 20.3-cm SCT Mail
1993 04 05.120 11.9 mv TB Schmeer, P. 20.3-cm SCT Mail
1993 04 05.15 11.6 mv Levy, S. 20.3-cm SCT, 133x News
(Univ. Minnesota)
1993 04 05.431 11.8 mv TB Takahashi, S. Mail
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Time system is Universal Time. Magnitude systems: mv = visual, Bessel UBVRI
system (B, V, R, I), Ic = Cousins I (near infrared), Stroemgren photometry
(g,r), p = photographic, C = unfiltered CCD magnitude. Sequences: AC = AAVSO
chart, GP = Guide Star Photometric Catalog, TA = The Astronomer, TB =
Thompson/Bryan Supernova Search Chart, S = SAO Star Catalog. Sources:
IAUC = IAU circular, AAVSO = AAVSO Alert Notice.
Observations have been communicated by mail from: Taichi Kato (Kyoto Univer-
sity, Japan), Hans Bengtsson (Hisings Backa, Sweden), Dominique Beauchamp
(Quebec, Canada), Margareta Westlund (Uppsala, Sweden), Gary Poyner (Birming-
ham, England), George Turner (Indiana University, USA), Patrick Schmeer
(Bischmisheim, Germany), Haakon Dahle (Oslo, Norway). Thanks for the obser-
vations! I would also like to thank Taichi Kato for valuable information in
preparing this report.
Kind regards,
Bjorn H. Granslo
bgranslo@astro.uio.no
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