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Date: Wed, 21 Apr 1993 18:06:11 +0200
From: granslo@argo.uio.no
Subject: SN 1993J - NAS.VSS Report No. 3
Norwegian Astronomical Society - Variable Star Section
VISUAL OBSERVATIONS OF SUPERNOVA 1993J IN M81 - REPORT NO. 003 (1993 April 20)
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YYYY MM DD.DDD OBSERVATION MAGN CL INSTRUM. OBSERVER
1993 04 17.929 104-4;105-3;D=V;3+7 10.8 1 C203,133x Dahle, H.
6+10;E+9;F+10
1993 04 17.999 C-8;D-3;Ar+5;E+7 11.0 1 C203,123x Granslo, B. H.
1993 04 18.872 104-2;105-1;D+2;3+10;Ar+7 10.6 1 C203,133x Dahle, H.
1993 04 19.858 104-3;105-2;D=V;3+7 10.8 1 C203,133x Dahle, H.
1993 04 19.892 D-1;103W(4)V(6)E 10.8 1 C203,117x Skjaeraasen, O.
103W(3.5)V(6.5)6
1993 04 19.924 C-8;D-2;Ar+4;E+7;3+8 11.0 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. Comparison stars:
103W = 10.3, C = 10.32; 104 = 10.4; 105 = 10.5; D = 10.7, Ar = 11.40,
3 = 11.62, E = 11.78, 6 = 11.85, F = 11.90. Identifications: The Astronomer
(C, D, E, F), Thompson-Bryan chart (103W, 104, 105), Corwin (3, 6), Richmond
(Ar). Magnitudes: AAVSO mv (D, 103W, 104, 105), Corwin V (E, F, 3, 6),
Richmond V (Ar), Brandt (C). 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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