AAVSO NEWS FLASH No. 23

              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: TT BOO, FG SGE                             No. 23
                                                    MAY 20, 1996
________________________________________________________________________________

TT BOOTIS

The dwarf nova type (SU UMa subclass) cataclysmic variable TT Boo is in 
outburst as indicated by the following observations:

                     AAVSO Observer       
    UT         Mag.    Initials           
                   
MAY 18.2535   <13.5      HSG  
MAY 18.997    <13.9      VMT  
MAY 19.2340   <13.9      BTH  
MAY 19.9875    14.1      BMM  
MAY 20.2382    13.4      BTH  
MAY 20.2708    13.3      GRI  
-----------------------------------------------------------------------------
FG SAGITTAE

Monsignor Ronald Royer reports that a set of CCD images taken by him and 
Steve Padilla with a Starlight CCD using dichroic interference filters and an 
IR blocking filter show the following magnitudes for FG Sge on MAY 18.4167:

        16.5 mag. visual -  with an IR blocking filter,
        17.0 mag. blue   -  with an IR blocking filter, and
        15.5 mag. red    -  with no IR blocking filter.  

Monsignor Royer reports that FG Sge appears as a very reddened object in 
these images.
-----------------------------------------------------------------------------
We apologize for the omission of D. Overbeek (South Africa) from the list 
of contributors in News Flash No. 22.  D. Overbeek is one of the most 
active observers of the AAVSO and his observations are greatly appreciated.

We thank the following contributors for the data that they have provided 
for this News Flash:
                       BMM - M. Biesmans, Belgium   
                       BTH - T. Burrows, USA        
                       GRI - J. Griese, USA         
                       HSG - G. Hanson, USA         
                       PAS - S. Padilla, USA
                       RR  - R. Royer, USA          
                       VMT - T. Vanmunster, Belgium 

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

Good observing!
Janet A. Mattei
________________________________________________________________________________
Symbols may include:  < = fainter than magnitude given (variable not seen)
                      : = uncertain
                   CCDV = Charge-coupled device with (V) filter

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

                     observations@aavso.org

Those who wish to subscribe (free of charge) or 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!
________________________________________________________________________________

Return to HomePage