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AAVSO International Database

Alert Notice 384: Outburst of GK Persei

September 24, 2008: As reported in AAVSO Special Notice #125, the cataclysmic variable GK Persei appears to be entering another outburst.  The object began a slow rise on or about 2008 September 10 UT (JD 2454719.5), rising nearly one magnitude above its typical quiescent level of m(vis) = 13, to near m(vis) = 12.2 at present (2008 September 24 UT, JD 2454733.5).  This rate of brightening is typical of past outbursts, and suggests a rise to full outburst may occur soon.  However, this activity comes much sooner than expected based on past intervals between outbursts, and
Tags
AAVSO Alert Notice
GK Per
nova
cataclysmic variable
AAVSO International Database

Alert Notice 385: SN 2008fw in NGC 3261

September 29, 2008 : As announced in CBET 1521 (Monard and Morrell; Daniel W.E. Green, editor), SN 2008fw, a supernova of type Ia, has been discovered in the spiral galaxy NGC 3261 by L.A.G. "Berto" Monard of South Africa.  The most recent observation placed the supernova at an unfiltered magnitude of 14.2 on 2008 September 26.123 (JD 2454735.623).  It has been within 0.1 magnitude of that measure since its discovery, and it is believed to be no more than one week past maximum.  N.
Tags
AAVSO Alert Notice
SN 2008fw
NGC 3261
Type Ia supernova
AAVSO International Database

Alert Notice 386: Low state of VY Scl

October 2, 2008 : The cataclysmic variable VY Scl appears to have recently entered a low state according to observations recently submitted to the AAVSO. Javier Temprano reports positive detections of VY Scl at CV=17.46 on JD 2454730.46181 (2008 Sept 20.9618) and at CV=18.23 on JD 2454730.572 (2008 Sept 21.072).  All other recent AAVSO and ASAS-3 (Pojmanski, G.
Tags
AAVSO Alert Notice
VY Scl
novalike variable
AAVSO International Database

Alert Notice 387: V1721 Aql (Nova Aql 2008)

October 3, 2008
 

Event: Nova in Aquila

Discovered By: K. Itagaki (Yamagata, Japan)

Discovery Date: 2008 September 22.5 UTC (JD 2454732.0)

Discovery Magnitude: m = 14.0 (unfiltered)

Position: RA = 19h 06m 28.58s , Dec = +07d 06m 44.3s (from Itagaki)

Charts: Finter charts for this object may be plotted using VSP:
http://www.aavso.org/vsp

Tags
V1721 Aql
Nova Aql 2008
interstellar reddening
AAVSO International Database
AAVSO Alert Notice

Alert Notice 388: Nova Mus 2008 = QY Mus

October 6, 2008
 

Event: Nova in Musca

Discovered By: W. Liller (Vina del Mar, Chile)

Discovery Date: 2008 September 28.998 UT (JD 2454738.498)

Discovery Magnitude: m=8.6 (Tech Pan phot + orange filter)

Position: RA = 13h 16m 36.44s , Dec = -67d 36m 47.8s (from P. Nelson)

Charts: Finder charts for this object may be plotted by entering the coordinates above into VSP: http://www.aavso.org/vsp

Tags
AAVSO Alert Notice
Nova Mus 2008
QY Mus
AAVSO International Database

Alert Notice 389: Support for VLT spectroscopy of the novalike variable VY Scl

November 11, 2008 : Dr. Steve Howell (NOAO, Tucson) informs us that he has been awarded time to obtain spectroscopic observations of the cataclysmic variable VY Scl with the Very Large Telescope in Chile. These observations are being  sought during VY Scl's current deep minimum, which began some time before 2008 September 20 (JD 2454730). VLT observations are scheduled via prioritized queue, and the exact observation time is not yet known; however, observations are expected within 1-2 weeks.
Tags
VY Scl
VLT
novalike variable
AAVSO International Database
AAVSO Alert Notice

Alert Notice 392: Supernova 2008hy in IC 334

December 8, 2008: Further to CBETs No. 1608 (Puckett and Langoussis; Daniel W. E. Green, editor) and No. 1610 (Dennefeld et al., and Yamanaka et al.) the supernova SN 2008hy has been identified as a Type Ia supernova, and is believed to be near maximum light (V=14.3 on 2008 Dec 07.13, JD 2454807.63; T. Orff, reported by Puckett and Langoussis).  The object is located approximately 100 arcseconds NNE of the center of IC 334.
 

Independently obtained spectroscopy of the supernova by Dennefeld et al.

Tags
AAVSO Alert Notice
SN 2008hy
Type Ia
AAVSO International Database

Alert Notice 393: Monitoring for a planetary transit of HD 80606

February 3, 2009: Dr. Greg Laughlin (Lick Observatory) requests intensive time-series photometry of the possible transiting extrasolar planetary system HD 80606. This system, recently in the news due to the extreme temperatures to be found on the planet, is predicted to reach conjunction on or around HJD 2454876.5 (2009 Feb 14.0 UT), and there is a low but significant probability (<15%) that the system is eclipsing. If it eclipses, the duration of the eclipse may be as long as 17 hours.
Tags
planetary transit
HD 80606
exoplanets
AAVSO International Database
AAVSO Alert Notice

Alert Notice 394: Nova in the Large Magellanic Cloud

February 9, 2009
 

Event: Nova in The Large Magellanic Cloud         [N LMC 2009]

Discovered By: W. Liller (Vina del Mar, Chile)

Discovery Date: 2009 February 05.067 UT (JD 2454867.567)

Discovery Magnitude: m=10.6 (Tech Pan photograph, unfiltered)

Position: RA = 05h 40m 44.20s , Dec = -66d 40m 11.6s (J2000; H. Bond et al.)

Charts: Finder charts for this object may be plotted by entering the coordinates above into VSP: http://www.aavso.org/vsp

Tags
AAVSO Alert Notice
Nova LMC 2009
Nova LMC 1971
AAVSO International Database
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