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Alert Notice 145: Request to monitor dwarf novae for IUE observing runs AND Request to monitor high-galactic latitude cataclysmic variables for IUE observing run

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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    AH Eri      13.5-18.5           1251+27     GO Com      13 -20
0956+34   RU LMi     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

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