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[vsnet-obs 425] AL Com,U Gem (NAS.VSS)

>From varstars-owner@nic.funet.fi Mon Apr 10 20:42:34 1995
To: varstars@lists.funet.fi, aavso@cfa0.harvard.edu, b.h.granslo@astro.uio.no
cc: stigfo@powertech.no
X-Mts: smtp

            Norwegian Astronomical Society - Variable Star Section

     ===== AL COMAE BERENICES - NAS.VSS REPORT NO. 003 (1995 Apr 10) =====

    This SU UMa/WZ Sge type dwarf nova is currently undergoing a very rare
    outburst and the following observations are available by members of
    NAS.VSS:
    ----------------------------------------------------------------------
    YYYY MM DD.DDD  LIGHT ESTIMATES     MAG  CL INSTRUM.   OBSERVER
    ----------------------------------------------------------------------
    1995 04 07.860  A-5;B-5            12.4  2  C203,123x  Granslo, B.H.
    1995 04 07.892  B-6;C+7            12.7  2  C203,133x  Dahle, H.
    1995 04 08.912  A-7;B-6;E+6;C+8    12.6  1  C203,222x  Granslo, B.H.
    1995 04 08.983  B-7;C+6            12.8  2  C203,133x  Dahle, H.
    1995 04 09.967  A-9;B-7;E+3        12.8  2  C203,222x *Granslo, B.H.
    ----------------------------------------------------------------------
    Comparison stars (identifications from TA Electronic Circular No. 943;
    magnitudes by Stanton and Bertola): A = 11.85; B = 11.96; E = 13.2;
    C = 13.51.

        ===== U GEMINORUM - NAS.VSS REPORT NO. 003 (1995 Apr 10) =====

    The following NAS.VSS observations since March 31 are available and
    cover the current outburst:
    ----------------------------------------------------------------------
    YYYY MM DD.DDD  LIGHT ESTIMATES     MAG  CL INSTRUM.   OBSERVER
    ----------------------------------------------------------------------
    1995 03 31.894  L-7;M-2            14.0  2  M316,270x  Midtskogen, O.
    1995 04 01.860  K-1;M+3            12.8  1  M316,130x  Midtskogen, O.
    1995 04 02.008  H-2;L+8            12.5  2  C203,123x  Granslo, B.H.
    1995 04 02.030  G-5;H-1            12.4  2  C203,123x  Granslo, B.H.
    1995 04 02.817  A-8;B-2;C-1         9.3  1  C203,80x   Dahle, H.
    1995 04 02.888  A-6;B+2             8.9  1  M316,62x   Midtskogen, O.
    1995 04 02.920  A-5;B=V;D+3         9.0  1  C203,123x  Granslo, B.H.
    1995 04 02.923  B=V;C+3             9.0  1  C203,123x  Bjerved, T.V.
    1995 04 03.847  B-1;C+3             9.1  1  M316,62x   Midtskogen, O.
    1995 04 03.919  A-5;B=V;C+2         9.0  1  C203,123x  Granslo, B.H.
    1995 04 03.920  A-6;B=V;C+2         9.1  1  C203,80x   Dahle, H.
    1995 04 04.826  A-6;B+1;D+3         9.0  1  C203,123x  Granslo, B.H.
    1995 04 04.856  B-2;D+2             9.2  1  C203,62x   Midtskogen, O.
    1995 04 07.815  A-6;B-1;C+1;X+2     9.2  1  C203,123x  Granslo, B.H.
    1995 04 07.894  B-2;C=V             9.3  1  C203,133x  Dahle, H.
    1995 04 08.904  A-7;B-2;C+1;X+2     9.2  1  C203,123x *Granslo, B.H. 
    1995 04 08.987  B-3;C=V             9.3  1  C203,133x *Dahle, H.
    1995 04 09.969  B-4;C-1;X+1;Y+4     9.5  1  C203,123x *Granslo, B.H.  
    ---------------------------------------------------------------------
    Comparison stars (identifications from NAS.VSS (stars X and Y) and
    Burnham's Celestial Handbook (other stars); magnitudes by AAVSO):
    A = 8.5; B = 9.0; C = 9.3; X = 9.5; Y = 10.1; G = 11.9; H = 12.3;
    K = 12.6; L = 13.3; M = 13.8.

    General comments:
    All observations are visual. Time system is year (YYYY), number of
    month (MM) and date with desimals in Universal Time (DD.DDD). Magni-
    tudes are calculated from Pogson's step method. CL = class: esti-
    mated accuracy of observation: 1 = good (+/- 0.1 mag.); 2 = fair
    (+/- 0.2 mag.); 3 = poor (+/- 0.3 mag. or worse). Instrument (type,
    aperture in millimeters, and magnification): C = catadioptic tele-
    scope (SCT); M = Newtonian reflector. An asterisk (*) indicates new
    observations since the previous reports on AL Com (No. 2 - 1995 Apr 9)
    and U Gem (No. 2 - 1995 Apr 8).

    Observers: T. V. Bjerved (Fjellhamar, Norway); H. Dahle (Oslo, Norway);
    B. H. Granslo (Fjellhamar, Norway); O. Midtskogen (Tranby, Norway).

                                            Yours sincerely,
                                            Bjorn H. Granslo
                                            Director, NAS.VSS