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[vsnet-alert 373] AAVSO NEWS FLASH - No. 7





              THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
                   25 Birch Street, Cambridge, MA 02138 USA
                   Tel. 617-354-0484       Fax 617-354-0665
                          INTERNET: aavso@aavso.org

                        * * *  AAVSO NEWS FLASH  * * *

Subject: ER UMa, SS Aur, YZ Cnc, SS Cyg,            No. 7
         V516 Cyg, AM Her, X Leo, CN Ori, 
         GK Per, TZ Per, UV Per, CY UMa,            March 26, 1996
         Z UMi                                     
________________________________________________________________________________

ER URSAE MAJORIS

The dwarf nova type (possibly U Gem subclass) cataclysmic variable 
ER UMa is having an outburst as indicated by the following observations:

    UT             JD        Mag.      Observer

MAR 17.0840   2450159.584    14.2      (J. Bortle, USA)         
MAR 18.0563   2450160.5563   15.0      (Bortle)         
MAR 21.2403   2450163.7403   14.0      (T. Burrows, USA)         
MAR 24.2174   2450166.7174   13.1      (Burrows)         
MAR 24.868    2450167.368    12.7      (L. T. Jensen, Denmark)         
MAR 25.125    2450167.625    13.0      (R. Stewart, USA)         
MAR 26.3250   2450168.825    12.1      (Burrows)  
------------------------------------------------------------------------------

SS AURIGAE

This star has slowly reached maximum (see AAVSO News Flash No. 6) as 
indicated by the following observations:

    UT             JD        Mag.      Observer

MAR 22.8      2450165.3      11.0      (M. Verdenet, France)         
MAR 22.8      2450165.3      11.2      (J. Gunther, France)         
MAR 23.0889   2450165.5889   10.7      (D. Weier, USA)         
MAR 23.1778   2450165.6778   10.9      (T. Burrows, USA)         
MAR 23.8      2450166.3      10.8      (Verdenet)         
MAR 24.1736   2450166.6736   10.9      (Burrows)         
MAR 24.862    2450167.362    10.8      (L. T. Jensen, Denmark)         
MAR 25.0306   2450167.5306   10.7      (J. McKenna, USA)         
MAR 25.054    2450167.554    10.9      (R. Stewart, USA)         
MAR 26.2785   2450168.7785   11.0      (Burrows)         
------------------------------------------------------------------------------

YZ CANCRI

The superoutburst of this dwarf nova continues (see AAVSO News Flash No. 6) 
as indicated by the following observations:

    UT             JD        Mag.      Observer

MAR 22.8      2450165.3      11.8      (J. Gunther, France)           
MAR 23.2007   2450165.7007   11.7      (T. Burrows, USA)           
MAR 23.8      2450166.3      11.9      (M. Verdenet, France)           
MAR 24.010    2450166.51     11.3      (R. Stewart, USA)           
MAR 24.1965   2450166.6965   11.6      (T. Burrows, USA)           
MAR 24.854    2450167.354    11.5      (L. T. Jensen, Denmark)          
MAR 25.060    2450167.56     11.7      (Stewart)           
MAR 25.1063   2450167.6063   11.7      (M. Dombrowski, USA)           
MAR 25.1345   2450167.6345   11.5      (J. McKenna, USA)           
MAR 26.2958   2450168.7958   11.8      (Burrows)             
------------------------------------------------------------------------------

SS CYGNI

The dwarf nova type (U Gem subclass) cataclysmic variable SS Cyg is fading 
from a short outburst as indicated by the following observations:

    UT             JD        Mag.      Observer

MAR 14.194    2450156.694    12.3      (P. Schmeer, Germany)           
MAR 14.4188   2450156.9188   11.9      (M. A. Komorous, Canada)           
MAR 16.3875   2450158.8875   11.4      (Komorous)           
MAR 18.629    2450161.129    11.7      (W. Albrecht, USA)            
MAR 19.4944   2450161.9944    9.7      (N. Simmons, USA)           
MAR 19.629    2450162.129     8.7      (Albrecht)            
MAR 20.1743   2450162.6743    8.9      (M. Kohl, Switzerland)           
MAR 20.185    2450162.685     8.7      (Schmeer)           
MAR 21.1368   2450163.6368    8.9      (S. Brincat, Malta)           
MAR 22.1576   2450164.6576    9.5      (Brincat)           
MAR 23.40     2450165.9       9.4      (P. Dombrowski, USA)           
MAR 24.40     2450166.9       9.4      (Dombrowski)           
MAR 24.4069   2450166.9069    9.3      (J. Griese, USA)           
MAR 25.132    2450167.632     9.7      (L. T. Jensen, Denmark)           
------------------------------------------------------------------------------

V516 CYGNI

The dwarf nova (U Gem subclass) cataclysmic variable V516 Cyg is in 
outburst as reported by L. T. Jensen.

    UT             JD        Mag.      Observer

MAR 25.133    2450167.633    14.0      (L. T. Jensen, Denmark)             
------------------------------------------------------------------------------

AM HERCULIS

The magnetic cataclysmic variable AM Her is showing some activity as 
indicated by the following observations:

    UT             JD        Mag.      Observer

MAR 6.5625    2450149.0625   13.2      (R. Royer, USA)          
MAR 14.4285   2450156.9285   13.3      (M. A. Komorous, Canada)         
MAR 16.3993   2450158.8993   13.3      (Komorous)         
MAR 20.1701   2450162.6701   13.0      (M. Kohl, Switzerland)         
MAR 22.1396   2450164.6396   13.3:     (S. Brincat, Malta)         
MAR 24.4021   2450166.9021   13.3      (J. Griese, USA)         
MAR 25.3153   2450167.8153   13.4      (Griese)         

If AM Her continues to fade into its down state, astronomers in Germany will 
try to monitor it with the ROSAT x-ray satellite.  Please keep a close eye on 
this star and let us know of its behavior. 
------------------------------------------------------------------------------

X LEONIS

This star (see AAVSO News Flash No. 6) has started to fade as indicated by the 
following observations:

    UT             JD        Mag.      Observer

MAR 22.8      2450165.3      12.1      (M. Verdenet, France)         
MAR 22.8      2450165.3      12.2      (J. Gunther, France)         
MAR 23.2299   2450165.7299   12.4      (T. Burrows, USA)         
MAR 23.8      2450166.3      12.4      (Verdenet)         
MAR 24.027    2450166.527    12.3      (R. Stewart, USA)         
MAR 24.2208   2450166.7208   13.1      (Burrows)         
MAR 24.3056   2450166.8056   13.0      (J. Griese, USA)         
MAR 24.870    2450167.37     13.5      (L. T. Jensen, Denmark)         
MAR 25.069    2450167.569    13.7:     (Stewart)         
MAR 26.3201   2450168.8201  <13.5      (Burrows)              
------------------------------------------------------------------------------

CN ORIONIS

The dwarf nova type (Z Cam subclass) cataclysmic variable CN Ori has gone 
into an outburst as indicated by the following observations:

    UT             JD        Mag.      Observer

MAR 23.0563   2450165.5563   12.5      (D. Weier, USA)         
MAR 23.8      2450166.3      12.1      (M. Verdenet, France)         
------------------------------------------------------------------------------

GK PERSEI

The minor outburst of this old nova continues.  GK Per is slowly brightening 
as indicated by the following observations: 

    UT             JD        Mag.      Observer

MAR 22.0910   2450164.591    10.5      (R. Hays, USA)       
MAR 22.1424   2450164.6424   10.1      (W. Dillon, USA)       
MAR 22.1618   2450164.6618   10.5      (T. Burrows, USA)       
MAR 23.1056   2450165.6056   10.3      (Dillon)       
MAR 23.1708   2450165.6708   10.6      (Burrows)       
MAR 23.8      2450166.3      10.5      (M. Verdenet, France)       
MAR 23.812    2450166.312    10.4      (P. Schmeer, Germany)       
MAR 24.0285   2450166.5285   10.7      (M. A. Komorous)       
MAR 24.1674   2450166.6674   10.4      (Burrows)       
MAR 24.815    2450167.315    10.4      (Schmeer)       
MAR 25.0014   2450167.5014   10.6      (J. McKenna, USA)       
MAR 25.83     2450168.33     10.2      (G. Comello, Netherlands)
            
The XTE satellite has now observed this star four times and will observe 
it once more in the near future.  Please keep a close eye on this star so 
that we can provide good coverage for correlation of data with XTE 
observations.
------------------------------------------------------------------------------

TZ PERSEI

The dwarf nova type (Z Cam subclass) cataclysmic variable TZ Per is in 
outburst as indicated by the following observations:

    UT             JD        Mag.      Observer

MAR 17.0368   2450159.5368   13.7      (J. Bortle, USA)         
MAR 18.0333   2450160.5333   13.5      (G. Chaple, USA)         
MAR 19.0049   2450161.5049   12.6      (Chaple)         
MAR 20.80     2450163.3      13.1      (M. Verdenet, France)         
MAR 21.0819   2450163.5819   12.4      (A. Dill, USA)         
MAR 24.872    2450167.372    12.8      (L. T. Jensen, Denmark)         
MAR 25.0104   2450167.5104   12.9      (J. McKenna, USA)         
------------------------------------------------------------------------------

UV PERSEI 

The superoutburst continues (see AAVSO News Flash No. 6) as indicated by 
the following observations:

    UT             JD        Mag.      Observer

MAR 23.1590   2450165.659    12.5      (T. Burrows, USA)           
MAR 23.8      2450166.3      12.6      (M. Verdenet, France)           
MAR 23.815    2450166.315    12.5      (P. Schmeer, Germany)           
MAR 24.1583   2450166.6583   12.7      (Burrows)           
MAR 24.819    2450167.319    12.6      (Schmeer)           
MAR 24.859    2450167.359    12.3      (L. T. Jensen, Denmark)           
MAR 25.0083   2450167.5083   12.2      (J. McKenna, USA)           
MAR 25.050    2450167.55     12.4      (R. Stewart, USA)           
------------------------------------------------------------------------------

CY URSAE MAJORIS

The outburst of this star (see AAVSO News Flash No. 6) continues as indicated 
by the following observations:

    UT             JD        Mag.      Observer

MAR 23.2375   2450165.7375   13.2      (T. Burrows, USA)      
MAR 23.877    2450166.377    12.2      (P. Schmeer, Germany)      
MAR 24.097    2450166.597    13.0      (R. Stewart, USA)      
MAR 24.2264   2450166.7264   13.1      (Burrows)      
MAR 24.3313   2450166.8313   13.0      (J. Griese, USA)      
MAR 24.856    2450167.356    12.6      (Schmeer)      
MAR 24.869    2450167.369    13.0      (L. T. Jensen, Denmark)      
MAR 25.089    2450167.589    13.3      (Stewart)      

------------------------------------------------------------------------------

Z URSAE MINORIS 

The R CrB type variable, Z UMi, continues to fade.  T. Burrows reported 
this star at <13.7 on March 23.3021 UT (2450165.8021 JD).
------------------------------------------------------------------------------

Please monitor these stars closely and phone-in, fax, or e-mail your 
observations to the AAVSO.

Good observing!
Janet A. Mattei

________________________________________________________________________________

AAVSO NEWS FLASH is a new electronic publication of the AAVSO intended
to provide observers with timely information on unusual variable star
activity.  The basis of the data in this publication will be the
observations reported to AAVSO Headquarters.

The AAVSO NEWS FLASH will not replace the AAVSO Alert Notice.  It will
be more frequent and shorter.

If you would like to contribute to AAVSO NEWS FLASH, please send
observations of unusual variable star activity to:

                     observations@aavso.org

Please include the words NEWS FLASH in the subject line of your message.
If you are affiliated with a variable star organization besides the
AAVSO, and you wish that group to be indicated with the observations
that you provide, please give the specific name of the organization or
group and its abbreviation.

Those who wish to unsubscribe to NEWS FLASH may do so by sending a
message to:
                     observations@aavso.org

If you would like data from the AAVSO International Database for
research purposes, please send your request to:

        Janet Mattei, AAVSO Director, at aavso@aavso.org

We look forward to including your observations in future editions
of AAVSO NEWS FLASH!

_______________________________________________________________________________

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