AAVSO HOME > publications > news flash > u gem
 
 
 

Publications
Bulletin - LPV Predictions
Journal of the AAVSO
Newsletter of the AAVSO
Visual Observing Manual
CCD Observing Manual
Monographs
MyNewsFlash
Alert Notices
Special Notices
Email lists
Order a pub
 
Main sections of web
The AAVSO
Variable Stars
Observing
Access Data
Publications
Support
Education and Outreach
 
Pick a star

Create a light curve
Recent Observations
Find charts     
VSX
 

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
--------------------------------------------------------------------
ABOUT AAVSO NEWSFLASH SPECIAL NOTICE:

     AAVSO News Flash Special Notices are sent when
circumstances warrant to subscribers of the AAVSO MyNewsFlash
system on an average of one notice per month.

     Archives of Special Notices will be kept at:
      http://www.aavso.org/publications/newsflash/

     To unsubscribe from Special Notices simply reply to this
e-mail. It will not affect your regular MyNewsFlash
subscription.
--------------------------------------------------------------------


 
  search engine |  site map |  links |  contact us