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[vsnet-history 860] SN 1993J (NAS.VSS)


Date: Thu, 29 Apr 1993 17:57:21 +0200
From: granslo@argo.uio.no
Subject: SN 1993J - NAS.VSS Report No. 4

          Norwegian Astronomical Society - Variable Star Section

VISUAL OBSERVATIONS OF SUPERNOVA 1993J IN M81 - REPORT NO. 004 (1993 April 29)
==============================================================================

YYYY MM DD.DDD  OBSERVATION               MAGN  CL INSTRUM.   OBSERVER
1993 04 21.924  C-4;D-2;Ar+6;3+8          10.8  1  C203,133x  Dahle, H.
1993 04 21.967  D-4;Ar+4;E+6              11.1  2  C203,123x  Granslo, B.H.
1993 04 22.064  D-4;Ar+3;E+5;6+3;F+8      11.1  1  C203,123x  Granslo, B.H.
1993 04 24.979  D-4;Ar+5;3+5              11.0  2  C203,133x  Dahle, H.
1993 04 25.896  D-4;Ar+5;3+6              11.0  2  C203,133x  Dahle, H.
1993 04 25.978  D-8;Ar-1;E+1;6+3;F+4      11.5  1  C203,123x  Granslo, B.H.
1993 04 26.882  D-7;6+4;F+4;E+4;3=V;Ar-3  11.5  1  C203,133x  Dahle, H.
1993 04 26.915  Ar-3;E-1;3=V;F+2;6+2      11.7  1  C203,123x  Granslo, B.H.
1993 04 27.882  Ar-2;F+2;E+1              11.7  2  C203,123x  Andersen, O.I.
1993 04 27.908  Ar-2;3=V;E+2;6+3;F+3      11.6  1  C203,133x  Dahle, H.
1993 04 27.915  Ar-3;E=V;F+2;6+1;G+6      11.7  1  C203,123x  Granslo, B.H.
1993 04 28.910  Ar-3;3-2;6+2;F+2          11.7  1  C203,133x  Dahle, H.
1993 03 28.929  Ar-3;E-1;F+2;G+6          11.8  1  C203,123x  Granslo, B.H.

Time system is Universal Time. Magnitudes are calculated from the Pogson's
step method and the average magnitude is listed.  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.
Comparison stars: C = 10.32; D = 10.7 (var?), Ar = 11.40, 3 = 11.62,
E = 11.78, 6 = 11.85, F = 11.90, G = 12.45. Identifications: The Astronomer
(C, D, E, F, G), Corwin (3, 6), Richmond (Ar). Magnitudes: AAVSO mv (D),
Corwin V (E, F, G, 3, 6), Richmond V (Ar), Sandage (C). Star Ar is located
65"N and 23"E of star F. Contributing observers:

Odd Ivar Andersen, Kristiansandsgt. 5, leil. 404, N-0463 Oslo, Norway.
Haakon Dahle, Vestbrynet 12, N-1176 Oslo, Norway.
Bjorn H. Granslo, Nordahl Griegs vei 22A, N-1472 Fjellhamar, Norway.

                                                Bjorn H. Granslo

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