(fwd) SN 1994I - NAS.VSS

>From varstars-owner@nic.funet.fi Thu Apr 21 03:28:18 1994
To: varstars@lists.funet.fi
Cc: aavso@cfa0.harvard.edu, lasse.teist@thranethrane.dk400.dk
Subject: Supernova 1994I - NAS.VSS Report No. 3
X-Mts: smtp

          Norwegian Astronomical Society - Variable Star Section

OBSERVATIONS OF SUPERNOVA 1994I IN NGC 5194 - REPORT NO. 003 (1994 April 20)
============================================================================

YYYY MM DD.DDD  OBSERVATIONS          MAG  CL CD INSTRUM.   OBSERVER
1994 04 03.823  D=V;E+4              13.4  2  I  C203,200x  Dahle, H.
1994 04 03.893  N2=V;D+2             13.1  2  I  M203,135x  Andersen, O. I.
  (Observed from Malm, Norway)
1994 04 03.901  N2-4;D+1;E+4         13.3  2  I  M203,135x  Granslo, B. H.
  (Observed from Malm, Norway)
1994 04 03.902  D+4                  13.0  2  I  M152,196x  Lauvstad, A.
1994 04 03.915  N2-3;D+1             13.3  1  I  M316,260x  Midtskogen, O.
1994 04 03.999  D+5                  12.9  2  I  M152,196x  Lauvstad, A.
1994 04 04.035  D+1;E+5              13.3  2  I  C203,200x  Dahle, H.
1994 04 04.071  N2-3;D+2             13.2  2  I  M152,135x  Granslo, B. H.
  (Observed from Malm, Norway)
1994 04 05.882  C-5;D+3              13.1  1  I  C203,200x  Dahle, H.
1994 04 06.866  C-5;D+3;E+7          13.1  1  I  M152,196x  Granslo, B. H.
  (Observed from Levanger, Norway)
1994 04 06.873  D+4                  13.0  1  I  M152,196x  Lauvstad, A.
1994 04 07.830  C-3;D+5              12.9  1  I  C203,200x  Dahle, H.
1994 04 07.851  N2-2;D+3             13.1  1  I  M316,260x  Midtskogen, O.
1994 04 07.872  N2-3;D+4             13.1  1  I  M152,196x  Lauvstad, A.
1994 04 08.014  C-5;D+3;E+6          13.1  1  I  C203,222x  Granslo, B. H.
1994 04 08.854  C=V;D+7              12.7  1  I  M254,108x  Dahle, H.
1994 04 09.896  C-2;D+6              12.8  1  I  C203,200x  Dahle, H.
1994 04 09.898  C(4)V(4)D            13.0  1  I  M152,98x   Lauvstad, A.
1994 04 09.977  C-3;D+5              12.9  2  I  C203,222x  Granslo, B. H.
1994 04 10.918  N2-4;D+1             13.3  1  I  M316,260x  Midtskogen, O.
1994 04 10.927  C=V;D+6              12.7  2  I  C203,133x  Dahle, H.
1994 04 10.935  C-3;D+5              12.9  2  I  C203,222x  Granslo, B. H.
1994 04 11.849  C-3;D+4              13.0  2  I  C203,200x *Dahle, H.
1994 04 11.886  N2-3;D+1             13.3  2  I  M316,260x *Midtskogen, O.
1994 04 11.972  C-2;D+5              12.9  2  I  C203,222x *Granslo, B. H.
1994 04 12.907  C-6;D+1              13.3  1  I  C203,200x *Dahle, H.
1994 04 12.921  N2-5;D=V             13.4  1  I  M316,260x *Midtskogen, O.
1994 04 13.049  N2-1;D+3             13.1  1  I  C203,222x *Granslo, B. H.
1994 04 13.955  D=V;E+4              13.4  2  I  C203,200x *Dahle, H.
1994 04 13.957  C-5;D+2              13.2  2  I  C203,222x *Granslo, B. H.
1994 04 15.920  D-2;E+3              13.5  1  I  M316,260x *Midtskogen, O.
1994 04 15.943  D-2;E+1              13.6  2  I  C203,222x *Granslo, B. H.
1994 04 16.003  D=V;E+3              13.4  2  I  C203,200x *Dahle, H.
1994 04 16.903  D-2;E+3              13.5  1  I  C203,200x *Dahle, H.
1994 04 16.920  D-4;E-2              13.9  2  I  C203,222x *Granslo, B. H.
1994 04 17.990  D-3;E=V              13.7  2  I  C203,200x *Dahle, H.

Time system is Universal Time. Magnitudes are calculated from Pogson's
step method or the fractional method. CL = class: estimated accuracy of
observation; 1 = good (+/- 0.1 mag.), 2 = fair (+/- 0.2 mag.), 3 = poor
(+/- 0.3 mag.). CD = code: I = in-focus observation, 2 = out-of-focus
observation. Instrument (type, aperture in mm and magnification): C =
catadioptric telescope (SCT); M = Newtonian reflector. New and revised
data since Report No. 2 (1994 April 11) are marked with an asterisk (*)
and a cross (#), respectively.

List of comparison stars:
Ident.  Magnitude   Source    TB      Offset from nucleus
                              id.      of M51 (NGC 5194)
  A     11.24 V     Corwin    113       760" E    55" S
  B     11.8  mv    Hurst     ---       795" E    25" S
  N1    12.53 V     Skiff     ---       465" W   465" S
  C     12.6  mv    Hurst     ---       170" E   590" S
  N2    12.89 V     Skiff     ---       400" W   140" N
  D     13.44 V     Corwin    135        70" W    65" S
  E     13.72 V     Corwin    137     # 230" E    85" S
  F     14.5  mv    Hurst     ---       610" E   220" S
  G     15.09 V     Corwin    151        30" E   110" S

Identifications are from The Astronomer Electronic Circular No. 827
(stars A to G), Norwegian Astronomical Society - Variable Star Section
(N1 and N2) and the Thompson-Bryan atlas [TB]. Magnitudes by
H. G. Corwin Jr. [HC] and Guy M. Hurst [GH] are published in TA E827,
while the photometry by Brian A. Skiff [SK] are reported through the
Nova network.

Observers: Odd Ivar Andersen (Oslo, Norway); Haakon Dahle (Oslo, Norway);
Bjorn Haakon Granslo (Fjellhamar, Norway); Andreas Lauvstad (Levanger,
Norway); Oernulf Midtskogen (Tranby, Norway).

Supernova 1994I is located at R.A. = 13h 29m.90, Decl. = +47d 11'.5
(2000.0) or 14" east and 12" south of the nucleus of galaxy.

                                                Bjorn H. Granslo
                                                Director, NAS.VSS