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Alert Notice 137: Last list for monitoring of ROSAT targets

THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
    25 Birch Street, Cambridge, MA 02138 USA
    BITNET: aavso@cfa8 SPAN: nssdca::cfa8::aavso
     Tel. 617-354-0484 FAX 617-354-0665

    AAVSO ALERT NOTICE 137 (January 14,1991) 

LAST LIST FOR MONITORING OF ROSAT TARGETS

The x-ray ROentgen SATellite (ROSAT) is reaching the end of its survey mode of
operations at the end of January. So there are only two more weeks during which
this survey mode of the satellite will continue to observe cataclysmic variables.

Below are the observing target lists for the coming two weeks. Please monitor
these stars as closely as you can and call in your observations to Headquarters
immediately if you observe any of them brightening from their quiescent state.
Early alerts to the onset of outbursts are vital for the scheduling of simultaneous
multiwavelength observations. Also, for those stars which have both narrow and
wide outbursts, please continue to call in your observations for the first three
nights of an outburst so we may determine which type of outburst it is and so
inform the ROSAT team.

The success in studying cataclysmic variables going into and in outburst that the
ROSAT team of astronomers has had to date has been very much dependent on your close monitoring of these observing targets and your phone alerts to us. Your
continued dedication is essential to this program's success.

The answering machine (617-354-0484) at Headquarters is left on nights and
weekends. We monitor the messages regularly throughout these times. Also,
please send in the charges for your telephone calls so that we may reimburse
you.

ROSAT OBSERVING TARGETS: 14 - 31 JANUARY 1991

Week 25: 14-20 January 1991              Week 26: 21-31 January 1991
0058+40 RX And  0139+37 AR And       0102+59 HT Cas  0809-76 Z Cha
0109+37 FO And  0201+14 TT Ari         0124+57 KU Cas  1004-69 OY Car
0120+31 TY Psc   1004-69 OY Car         0130+50 KT Per  1307-60 NN Cen
                                                          0139+37 AR And  1325-54 BV Cen
                                                          0201+14 TT Ari

Our sincere thanks to you for your interest, dedication, and very valuable observations!

Clear Skies! Good Observing!

Janet A. Mattei
Director

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