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
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
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