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AAVSO Inernational Database

Alert Notice 408: Deep fading event in the cataclysmic variable TT Arietis

October 13, 2009
 

Tags: 
TT Ari
cataclysmic variable
AAVSO Inernational Database
AAVSO Alert Notice
Submitted by weo on Tue, 10/29/2013 - 15:14
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Alert Notice 409: V5584 Sgr = Nova Sagittarii 2009 Number 4

October 29, 2009

 

Event: Nova in Sagittarius (V5584 Sgr = N Sgr 2009 No. 4)

Discovered By: Koichi Nishiyama, Kurume, Fukuoka-ken, Japan, and F. Kabashima, Miyaki-cho, Saga-ken, Japan

Discovery Date: Oct. 26.439 UT (two frames from Oct. 26.439 and 26.440)

Discovery Magnitude: unfiltered CCD magnitude 9.3, using a 105-mm f/4 camera lens

Tags: 
V5584 Sgr
Nova Sgr 2009 No. 4
nova
AAVSO Inernational Database
AAVSO Alert Notice
Submitted by weo on Tue, 10/29/2013 - 15:01
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AAVSO Alert Notice 489: Nova Delphini 2013 = PNV J20233073+2046041 [V339 Del]

August 16, 2013

Event: Nova Del 2013 = PNV J20233073+2046041  [V339 Del]

Discovered by: Koichi Itagaki (Teppo-cho, Yamagata, Japan), reported by S. Nakano (Sumoto, Japan)

Discovery Magnitude: unfiltered CCD magnitude mag 6.8 using a 0.18-m reflector

Discovery date: 2013 Aug. 14.584 UT

Coordinates: R.A. 20 23 30.73  Decl. +20 46 04.1  (2000.0)

Tags: 
spectroscopy
PNV J20233073+2046041
V339 Del
P Cyg profile
Nova Del 2013
front page news
classical nova
AAVSO Inernational Database
AAVSO Alert Notice
Submitted by weo on Fri, 08/16/2013 - 16:59
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Special Notice #363: HS 2214+2845 (= V513 Peg) obs critical now

July 16, 2013: Based on your observations, the HST/COS team will be making the final decision tomorrow afternoon (2013 July 17) or the next morning whether to observe the dwarf nova HS 2214+2845 = V513 Peg on:

V513 Peg (HS 2214+2845) 2013 July 18 21:08:59 through July 19 01:04:23 UT

V513 Peg is 16.8V at minimum and 12.5V at maximum. Please monitor V513 Peg closely through July 19.

Tags: 
AAVSO Special Notice
HST
AAVSO Inernational Database
COS
1RXS J213807.1+261958
OT J213806.6+261957
front page news
HS 2214+2845
V513 Peg
dwarf nova
WZ Sge star
Submitted by weo on Tue, 07/16/2013 - 17:35
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Alert Notice 458: Multiwavelength observing campaign on AE Aqr

NOTE: Table of MAGIC observations revised 14 and 15 May 2012 per Dr. Christopher Mauche.

Tags: 
x-ray binary
white dwarf
pulsar
polar
observing campaign
multiwavelength
front page news
AE Aqr
AAVSO Inernational Database
AAVSO Alert Notice
Submitted by weo on Fri, 05/11/2012 - 05:58
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Special Notice #275: Possible Nova in Scutum = PNV J18562170-0852300

April 12, 2012:  Tom Krajci (KTC, Cloudcroft, NM) reports that a possible nova in Scutum has been announced on the IAU CBAT TOCP page (http://www.cbat.eps.harvard.edu/unconf/tocp.html) as PNV J18562170-0852300. It was discovered at unfiltered magnitude 9.7 on 2012 April 12.7954 UT by Y. Sakurai, Japan, on two 10-second exposures using a digital camera + 180-mm f/2.8 lens. Nothing was visible on an image taken 2012 Apr. 9.79 UT.

Tags: 
TOCP
Scutum
possible nova
PNV J18562170-0852300
front page news
AAVSO Special Notice
AAVSO Inernational Database
Submitted by weo on Thu, 04/12/2012 - 22:40
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Alert Notice 449: Outburst of the UGWZ Candidate BW Scl

October 25, 2011

Event: Outburst of the UGWZ Candidate BW Scl

Tags: 
WZ Sge star
time-series
superhumps
front page news
BW Scl
AAVSO Inernational Database
AAVSO Alert Notice
Submitted by weo on Tue, 10/25/2011 - 12:12
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Alert Notice 435: V5588 Sgr = Nova Sagittarii 2011 No. 2 = PNV J18102135-2305306 [V5588 Sgr]

Apri1 3, 2011

Event: V5588 SGR = NOVA SAGITTARII 2011 No. 2 = PNV J18102135-2305306  [V5588 Sgr]

Discovered by: Koichi Nishiyama, Kurume, Japan, and Fujio Kabashima, Miyaki, Japan

Discovery Date: ~ 2011 March 27.832 UT

Discovery Magnitude: unfiltered CCD magnitude mag 11.7 on two 40-s unfiltered CCD frames using a 105-mm f/4 camera lens (+ SBIG STL6303E camera)

Position: R.A. = 18:10:21.35, Decl. = -23:05:30.6 (equinox 2000.0)

Tags: 
V5588 Sgr
nova
front page news
AAVSO Inernational Database
AAVSO Alert Notice
Submitted by weo on Sun, 04/03/2011 - 19:36
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Special Notice #227: Unusual Behavior of FS Aur - Outburst Imminent?

January 3, 2011: The campaign to monitor activity of the peculiar cataclysmic variable FS Aurigae, as announced in AAVSO Alert Notice 428 (see also AAVSO Special Notice #226), continues. Principal Investigator Dr. Vitaly Neustroev reports that the campaign is going well, and that he is very appreciative of your observing efforts and contributions.

Tags: 
time series
outburst
FS Aur
front page news
cataclysmic variable
AAVSO Special Notice
AAVSO Inernational Database
Submitted by weo on Mon, 01/03/2011 - 13:56
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Special Notice #226: Request for observations of FS Aurigae

December 4, 2010: Further to AAVSO Alert Notice 428, the star FS Aurigae appears to be entering outburst.  The star was in quiescence on 2010 December 3.22 (JD 2455533.72; V = 16.3, G. Lubcke) but had risen to V=14.9 on 2010 December 4.23 (JD 2455534.73; R. Campbell).  Subsequent observations by H. McGee and A. Novichonok have confirmed that FS Aur is rising.  Time series observations of FS Aurigae are encouraged at this time; any and all filters may be used including clear, but V filter is preferred.

Tags: 
outburst
observing campaign
monitoring
FS Aur
front page news
AAVSO Special Notice
AAVSO Inernational Database
Submitted by weo on Sat, 12/04/2010 - 13:38
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Source URL: http://www.aavso.org/category/tags/aavso-inernational-database