[vsnet-alert 98] Eruption of U Gem (NAS.VSS observations)

[b.h.granslo@astro.uio.no]

            Norwegian Astronomical Society - Variable Star Section

                    +++++  OUTBURST OF U GEMINORUM +++++

    The following observations by members of NAS.VSS independently confirm
    that U Geminorum has started its long awaited outburst:
    ----------------------------------------------------------------------
    1995 U.T.   Mag.  Observation  Cl. Instrument           Observer
    ----------------------------------------------------------------------
    Mar 31.894  14.0  L-7;M-2       2  31.6-cm refl.(270x)  Midtskogen, O.
    Apr  1.860  12.8  K-1;M+3       1  31.6-cm refl.(130x)  Midtskogen, O.
    Apr  2.008  12.5  H-2;L+8       2  20.3-cm SCT (123x)   Granslo, B.H.
    Apr  2.030  12.4  G-5;H-1       2  20.3-cm SCT (123x)   Granslo, B.H.
    Apr  2.817   9.3  A-8;B-2;C-1   1  20.3-cm SCT (80x)    Dahle, H.
    ----------------------------------------------------------------------
    The last observation indicates that U Gem has entered a full maximum.

    Comparison stars (identifications from Burnham's Celestial Handbook,
    Vol. II, p. 931; magnitudes by AAVSO): A = 8.5; B = 9.0; C = 9.3;
    G = 11.9; H = 12.3; K = 12.6; L = 13.3; M = 13.8. Class (Cl.) is the
    estimated quality of observation: 1 = good, 2 = fair, 3 = poor.
    Observers were Ornulf Midtskogen (Tranby, Norway), Bjorn H. Granslo
    (observed from Aarnes, Norway), and Haakon Dahle (Oslo, Norway).

    The previous eruption of U Gem occured during the last days of August
    and the first days of September last year.

                                           Yours sincerely,
                                           Bjorn H. Granslo
                                           Director NAS.VSS

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