Skip to main content

Web Publications


			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 ROSA T 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

Keywords:
AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484