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[vsnet-history 746] SN 1993J (NAS.VSS)


Date: Fri, 16 Apr 1993 17:53:00 +0200
From: granslo@argo.uio.no
Subject: SN 1993J (NAS.VSS Report No. 002)

          Norwegian Astronomical Society - Variable Star Section

VISUAL OBSERVATIONS OF SUPERNOVA 1993J IN M81 - REPORT NO. 002 (1993 April 16)
==============================================================================

YYYY MM DD.DDD  OBSERVATION               MAGN  CL INSTRUM.   OBSERVER
1993 04 03.831  103W-8;104-6;105-5;D-3    11.0  1  C203,133x  Dahle, H.
1993 04 03.837  C-10;6+6                  11.2  2  C203,133x  Dahle, H.
1993 04 08.042  E+2;F+3;6+5;G+10          11.5  1  C203,133x  Dahle, H.
1993 04 08.868  E+4;F+5;6+3;G+10          11.4  1  C203,133x  Dahle, H.
1993 04 08.948  D(8)V(2)F;E+2;F+3;        11.6  1  C203,77x   Skjaeraasen, O.
                D(6)V(4)G
1993 04 08.985  D(7)V(2)F;E+2;F+3;        11.6  1  C203,77x   Skjaeraasen, O.
                D(5)V(5)G
1993 04 09.028  D(8)V(2)F;E+2;F+2         11.6  2  C203,77x   Skjaeraasen, O.
1993 04 09.962  3+2;E+4;F+5;6+6;G+10      11.4  1  C203,133x  Dahle, H.
1993 04 10.837  104-5;105-5;3+4;E+6;F+7   11.1  1  C203,133x  Dahle, H.
1993 04 11.980  3+4;E+4;F+6;6+7           11.3  1  C203,133x  Dahle, H.
1993 04 12.859  104-4;105-3;3+5;E+6;      11.0  1  C203,133x  Dahle, H.
                F+8;6+8
1993 04 13.842  D-2;E+5;F+8;3+6;6+8       11.1  1  C203,133x  Dahle, H.
1993 04 13.892  B(6)V(4)E;103W-4;D=V;     10.8  1  C203,77x   Skjaeraasen, O.
                B(6)V(4)F
1993 04 14.847  D-3;3+5;E+8;F+9;6+9       11.0  1  C203,133x  Dahle, H.
1993 04 15.864  104-4;105-3;D-1;3+8;E+9;  10.8  1  C203,133x  Dahle, H.
                F+10;6+10
1993 04 15.924  D-4;Ar+3;E+5;3+7;F+7      11.1  1  C203,123x  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: B = 9.4, 103W = 10.3, 104 = 10.4; 105 = 10.5; D = 10.7, Ar = 11.40,
3 = 11.62, E = 11.78, 6 = 11.85, F = 11.90, G = 12.45. Identifications:
The Astronomer (B, D, E, F, G), Thompson-Bryan chart (103W, 104, 105), Corwin
(3, 6), Richmond (Ar). Magnitudes: AAVSO mv (B, D, 103W, 104, 105), Corwin V
(E, F, G, 3, 6), Richmond V (Ar). Star Ar is located  65"N and 23"E of star F.

Observers and observing sites: Haakon Dahle, Oslo, Norway; Bjorn H. Granslo,
Fjellhamar, Norway; Olaf Skjaeraasen, Oslo, Norway.

                                                Bjorn H. Granslo

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