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


				AAVSO ALERT NOTICE 145 (June 3, 1991)
				
REQUEST TO MONITOR DWARF NOVAE FOR IUE OBSERVING RUNS

Our assistance has been requested by astronomers in England who have been granted 
observing time with the IUE to monitor dwarf novae in outburst. The scheduled 
observing times are June 7-9, and June 26-28, 1991. We have been asked to alert 
the astronomers to the onset of outbursts of dwarf novae so that they may 
observe them with the IUE as soon as possible.

Please call in your observations of any active dwarf novae by June 6, so we may 
update the astronomers before their run starting on June 7. Continue to call in 
on June 7, 8, and 9. Please follow the same procedure for the second run: call 
in by June 25, then on June 26, 27, and 28.

REQUEST TO MONITOR HIGH-GALACTIC LATITUDE CATACLYSMIC VARIABLES FOR IUE OBSERVING RUN

We have been asked to assist astronomers at the Planetary Science Institute in 
Arizona with their ongoing (i.e., there is no cut-off date) IUE observations of 
high-galactic latitude cataclysmic variables in outburst. They are interested in 
monitoring the outbursts with IUE and in arranging simultaneous ground-based 
photometric and spectroscopic observations.

The stars they are interested in are listed below. You will notice that all of 
the target stars have long outburst interval times, and that their outbursts are 
unusual. Please monitor these stars closely, and call in to Headquarters your 
observations of any you see go into outburst.

Desig.	Name	Max-Min			Desig.		Name	Max - Min
0418-13	AHEri	13.5-18.5		1251+27		GO Com	13 -20
0956+34	RULMi	13.8-19.5		1454+41		IT Boo	12.7-19.6
1132+02	RZ Leo	11.5-19.2		1439+22a	UZ Boo	11.5-20.5
1147+49	BC UMa	10.9-18.3		2106-09		VY Aqr	8-17.5
1227+14	AL Com	13-22			2125-03		VZ Aqr	11 -17.2

Telephone calls to Headquarters in connection with the above requests will be 
reimbursed by the astronomers. Please submit your telephone charges to Headquarters 
for reimbursement.

Your close monitoring of cataclysmic variables as requested above and reporting 
any activity is crucial to the success of these observing runs. I thank you very 
much for your efforts and for your valuable astronomical contributions.

Good observing!

Janet A. Mattei
Director

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