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dwarf nova

Special Notice #381: HST/COS observations of SDSS J100658.40+233724.4

March 5, 2014: HST/COS are being scheduled for the U Gem-type dwarf nova SDSS J100658.40+233724.4, the 40th and final target of the major CV observing campaign organized in 2012 by Drs. Boris Gaensicke, Joseph Patterson, Arne Henden, and 13 other astronomers (see AAVSO Alert Notice 471 and note below). A precise time will be announced later, but the scheduled HST observing window is:

Special Notice #377: Reported outburst of the WZ Sge star AL Comae

December 6, 2013: Observer Carlo Gualdoni reports via the cvnet-outburst mailing list that the WZ Sge-type dwarf nova AL Comae is in outburst, with a magnitude of V=12.74 on 2013 December 6.185 (JD 2456633.1185).  Gary Poyner notes on the BAAVSS mailing list that this is the first observed outburst of AL Com since October 2007.  Both visual observations and CCD time series are encouraged.

Special Notice #376: HST observations of U Gem scheduled for December 6

December 2, 2013: Further to AAVSO Special Notice #318 (M. Templeton) and AAVSO Alert Notice 475 (E. Waagen), Dr. Michael Shara (American Museum of Natural History) informs us that HST/COS observations of the dwarf nova U Gem have been scheduled for 2013 December 6 UT (one day earlier than originally indicated in the December 2 posting to the AAVSO forums). The observations will take place:

Alert Notice 278: 1017-49 V383 Velorum (NSV 4834) = new dwarf nova

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 278 (November 20, 2000)

1017-49  V383 VELORUM (NSV 4834) = NEW DWARF NOVA

Alert Notice 290: Supernova 2001el in NGC 1448 (Horologium) AND Request to monitor cataclysmic variables for XMM-Newton observations

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 290 (September 20, 2001)

0341-44B  SUPERNOVA 2001el IN NGC 1448 (HOROLOGIUM)

Alert Notice 295: 1753-30B Nova Sagittarii 2002 AND 0006-12 WW Cet request to monitor for RXTE observations

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 295 (April 16, 2002)

1753-30B  NOVA SAGITTARII 2002

Alert Notice 139: Nova Herculis 1991 AND Outburst of 2325+43 DX Andromedae

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

                        AAVSO ALERT NOTICE 139 (March 29, 1991)

NOVA HERCULIS 1991

This bright nova is fading rather fast as indicated by the following observations:

Alert Notice 333: Possible New Dwarf Nova in Cet (ASAS023322)

January 21, 2006

SUBJECT: Possible New Dwarf Nova in Cet (ASAS023322)

Bogumil Pilecki, Warsaw University Astronomical Observatory, reports on a possible new nova or dwarf nova discovered by the ASAS3V instrument. Coordinates by David Boyd (BDG) using UCAC2 as reference are:

RA: 02:33:21.398 +/- 0.07 Decl.: -10:47:04.55 +/- 0.07 (J2000)

The previously unobserved object was first detected by ASAS3V on Jan 20.121 UT at magnitude 12.08 in V.

Alert Notice 334: Possible New Nova/Dwarf Nova in Hya

January 28, 2006

SUBJECT: Possible New Nova/Dwarf Nova in Hya

Grzegorz Pojmanski, Warsaw University Astronomical Observatory, reports on a possible new nova or dwarf nova discovered by the ASAS3V instrument. The previously unobserved object was first detected by ASAS3V at RA = 10h 25m 22s DEC = -15d 42'.4 (assumed J2000) on Jan 26.245 UT at magnitude 12.219 in V.

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