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U Gem Outburst & RXTE Satellite Observations
AAVSO Newsflash Special Notice (February 26, 2004)
0749+22 U Gem appears to be in outburst according to these
observations received by the AAVSO:
FEB 26.1432 13.5 JM CCDV
FEB 26.2528 13.7 KMA
FEB 26.6560 12.8 MDY00
FEB 26.7576 12.6 BVE Y
FEB 26.7639 12.8 RWG YUM
MDY00 YUTAKA MAEDA NAGASAKI, JAPAN
BVE VAN BALLEGOIJ, ERWIN HEESCH, NETHERLANDS
JM JAMES, ROBERT A. LAS CRUCES, NEW MEXICO, USA
KMA KOMOROUS, MIROSLAV A. LONDON, ONTARIO, CANADA
RWG RENZ, WOLFGANG KARLSRUHE, GERMANY
Our colleague Dr. John Cannizzo, NASA Goddard Space
Flight Center, will be observing U Gem's outburst
with NASA's Rossi X-Ray Timing Explorer (RXTE) satellite.
Good coverage throughout the outburst and after the star
returns to minimum will be crucial in correlating his
RXTE observations.
Both visual and CCD observations are encouraged. Visual
observers should note the that the 124 comparison star
on the AAVSO charts dated 1997 may be variable according to
research done by B. Sumner using ASAS-3 data. Avoid using
the comparison if possible.
CCD observers should observe in V first and B second and
choose from these comparison stars:
AAVSO
Chart
ID V Verr B-V B-Verr
85 8.62 0.01 0.33 0.01 +
114 11.41 0.006 0.490 0.007 ++
138 13.89 0.005 0.513 0.003 ++
+ V data from ASAS-3 and B-V from Tycho 2
(Tycho-2 error is estimated)
++ from A. Henden (USNO)
Clear skies!
Aaron Price, Technical Assistant
on behalf of Elizabeth Waagen, Interim Director
and Janet A. Mattei, Director
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