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U Sco

Special Notice #191: U Sco is possibly in outburst

January 28, 2010: The recurrent nova U Sco has been reported in outburst, and confirming observations and immediate reporting are urgently requested.

U Sco is located at coordinates RA: 16 22 30.80 , Dec: -17 52 43.0 (J2000).

Special Notice #193: Request for photometry of the recurrent nova U Scorpii

February 8, 2010: Dr. Bradley Schaefer has requested increased optical coverage of the recurrent nova U Scorpii through the end of February 2010 at least. Of greatest interest are calibrated multicolor photometry to follow the evolution of the optical spectrum throughout the outburst, and intensive time-series photometry to study flickering in the system and to time the eclipses. Recent photometry of U Scorpii has indicated that the nova ejecta shell has become optically thin, making the central star visible again.

Special Notice #197: Request for time-series photometry of U Sco

March 2, 2010: Dr. Bradley Schaefer (LSU) requests intensive time-series observations of U Scorpii beginning immediately and continuing through 2010 March 4 08:00 UT (JD 2455259.83). These observations are requested in support of coincident X-ray photometry by the XMM-Newton satellite. The XMM-Newton observations, requested by Dr. Jan-Uwe Ness (ESA), will investigate the X-ray behavior of U Sco during its transition from outburst back to quiescence.

Alert Notice 255: Outburst of the recurrent nova 1616-17 U Scorpii

THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
25 Birch Street, Cambridge, MA 02138 USA
INTERNET:  aavso@aavso.org
Tel. 617-354-0484       FAX 617-354-0665

AAVSO ALERT NOTICE 255 (February 25, 1999)

OUTBURST OF THE RECURRENT NOVA 1616-17 U SCORPII

Alert Notice 415: Recurrent Nova U Scorpii in outburst

January 28, 2010
 
Object: U SCO
 
Coordinates: R.A. 16h 22m 30.80s Dec. -17o 52' 43.0" (2000.0)
 

U Scorpii

The recurrent nova U Scorpii

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