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[vsnet-history 736] SN 1993J (NAS.VSS)


Date: Thu, 15 Apr 1993 21:59:09 +0200
From: granslo@argo.uio.no
Subject: SN 1993J (NAS.VSS Report No. 001)

          Norwegian Astronomical Society - Variable Star Section

VISUAL OBSERVATIONS OF SUPERNOVA 1993J IN M81 - REPORT NO. 001 (1993 April 15)
==============================================================================
YYYY MM DD.DDD  OBSERVATION               MAGN  CL INSTRUM.   OBSERVER
1993 03 30.870  103W-4;Ar+5               10.8  1  M316,130x  Midtskogen, O.
1993 03 30.899  103W-4;D+3                10.6  1  M316,130x  Midtskogen, O.
1993 03 31.130  C-5;103W+1                10.5  1  M316,130x  Midtskogen, O.
1993 04 02.828  E-1;F+3                   11.7  2  M316,130x  Midtskogen, O.
1993 04 02.867  D-6;Ar-3;F+6              11.4  2  C203,123x  Granslo, B.H.
1993 04 03.011  D-4;Ar-1;F+5              11.3  2  C203,123x  Granslo, B.H.
1993 04 03.11   D(3)V(7)G,D(4)V(6)G       11.3  2  M254,108x  Skartlien, R.
1993 04 03.820  E-2;F+2                   11.8  2  M316,130x  Midtskogen, O.
1993 04 06.009  Ar-5;E-2;F-1;G+6          11.9  1  M203,135x  Granslo, B.H.
1993 04 06.092  Ar-5;E-2;F=V;G+6          11.9  1  M152,135x  Granslo, B.H.
1993 04 06.903  Ar-5;E-2;F-1              12.0  2  M152,135x  Granslo, B.H.
1993 04 10.920  D-7;Ar=V;E+2;F+5          11.4  1  M203,135x  Granslo, B.H.
1993 04 11.883  D-3;Ar+3;E+6;F+6          11.1  1  M152,74x   Granslo, B.H.           
1993 04 12.00   D(3)V(7)G                 11.2  2  M254,108x  Skartlien, R.
1993 04 12.00   105(3)V(7)E               10.9  2  M254,108x  Smedstuen, O.
1993 04 15.006  D-5;Ar+3;E+5;F+7          11.2  1  C203,80x   Granslo, B.H.

Time system is Universal Time. Magnitudes are calculated from the fractional
method or Pogson's step method. CL = class: estimated accuracy of observation;
1 = good (+/- 0.1 mag.), 2 = fair (+/- 0.2 mag.), 3 = poor (+/- 0.3 mag.).
Instrument (aperture in mm): C = Schmidt-Cassegrain, M = reflector. Comparison
stars: 103W = 10.3; 105 = 10.5, D = 10.7, X = 11.40, E = 11.78, F = 11.90,
G = 12.45. Identifications: The Astronomer (D, E, F, G), Thompson-Bryan chart
(103W, 105), Richmond (Ar). Magnitudes: AAVSO mv (103W, 105, D), Corwin V
(E, F, G), Richmond V (Ar). Star Ar is located 70"N and 20"E of star F.

Observers and observing sites: Bjorn H. Granslo, Fjellhamar, Norway (Apr 2/3,
Apr 14/15) and Malm (other dates); Ornulf Midtskogen, Tranby, Norway; Roar
Skartlien, Haagar Observatory, Norway; Ola Smedstuen, Haagar Observatory,
Norway.
                                                Bjorn H. Granslo

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