Nova Cas, SN1994I

>From varstars-owner@nic.funet.fi Wed Apr 20 07:09:49 1994
To: varstars@lists.funet.fi
Cc: b.h.granslo@astro.uio.no
Subject: Nova Cassiopeiae 1993 - NAS.VSS Report No. 22
X-Mts: smtp

           Norwegian Astronomical Society - Variable Star Section

   OBSERVATIONS OF NOVA CASSIOPEIAE 1993 - REPORT NO. 021 (1994 April 19)
   ======================================================================

YYYY MM DD.DDD  OBSERVATION           MAG  CL CD INSTRUM.   OBSERVER
1994 04 15.940  Fainter than 18-2    [13.5  2  I  C203,222x *Granslo, B. H.
1994 04 16.938  Fainter than 18-4    [13.7  2  I  C203,222x *Granslo, B. H.
1994 04 17.003  18-10;20=V            14.1: 3  I  C203,200x *Dahle, H.
1994 04 18.015  Fainter than 18      [13.3  2  I  C203,222x *Granslo, B. H.

Time system is Universal Time. Magnitudes are calculated from 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.). CD = code:
I = in-focus observation, O = out-of-focus observation. Instrument (type,
aperture in mm and magnification): C = catadioptric telescope (SCT);
M = Newtonian reflector. This report contains new (*) observations since
Report No. 21 (April 14).

Data for comparison stars (V- and mv-magnitudes):

  Id.     Offsets     Magn.  Ref.   Id.     Offsets     Magn.  Ref.
         m      '                           m       '
  6    +0.13  -15.4    6.25  SK     Rm   -0.07  - 0.5   12.8   NAS
  8    -0.56  + 2.3    8.28  SK     17   +0.35  + 1.0   13.09  SK
  9    +0.74  -14.1    8.56  SK     18   -0.26  + 0.8   13.28  SK
  10   -0.99  -11.7    9.35  SK     Ar   -0.05  - 1.0   13.37  TK
  11   +0.99  - 6.3    9.80  SK     19   -0.37    0.0   13.51  MK
  12   -0.10  + 5.3   10.37  SK     Tm   +0.02  + 1.0   13.8   NAS
  13   -0.82  - 1.8   10.92  SK     20   +0.17  - 1.3   13.95  MK
  14   +0.19  - 1.7   11.17  SK     Al   -0.18  - 1.2   14.4   AC
  Pm   +0.19  +10.8   11.5   NAS    Wm   -0.05  - 0.3   14.53  TK
  15   +0.92  + 4.7   11.83  SK     21   +0.06  - 1.0   14.65  MK
  Qm   +0.38  + 3.9   12.2   NAS    22   -0.14  + 0.5   15.03  MK
  16   -0.05  + 4.7   12.52  SK

Offsets are differential coordinates (delta R.A., Delta Decl.): comparison
star minus nova. Magnitude references: SK = B. Skiff photometry; NAS =
estimates by NAS.VSS observers; MK = M. Kidger photometry; TK = T. Kato
photometry; AC = AAVSO chart for Nova Cas 1993. Identifications are from
The Astronomer (numbered stars) and NAS.VSS (others).

Observers: Haakon Dahle (Oslo); Bjorn H. Granslo (Fjellhamar, Norway).

The complete file of NAS.VSS observations is available by anonymous ftp
at medusa.uio.no in directory pub/bgranslo/n1993cas. File name is
nasvss.f22.

                                               Bjorn H. Granslo
                                               Director, NAS.VSS