Skip to main content

front page news

All nodes that have this tag will posted to the home page "Recent Activity" block

AAVSO Alert Notice 616: Nova Sco 2018 No. 2 = PNV J16484962-4457032

February 13, 2018

Event: Nova in Scorpius: Nova Sco 2018 No. 2 = PNV J16484962-4457032

Discovered by: Hideo Nishimura (Kakegawa, Shizuoka-ken, Japan, reported by S. Nakano, Sumoto, Japan, via CBET 4488)

Discovery magnitude: unfiltered CCD magnitude 11.7 (on five frames using a Canon EOS 6D digital camera+200-mm-f.l. f/3.2 lens)

Discovery date: 2018 February 6.863 UT
 
Coordinates (2000.0): R.A. 16 48 49.62  Decl. -44 57 03.2

Alert Notice 615: ASASSN-18ca = PNV J00423439+4044255 - Probable Nova in M31

February 12, 2018

Event: Probable Nova in M31: ASASSN-18ca = PNV J00423439+4044255

Discovered independently by:
- Koichi Itagaki (Yamagata, Japan; reported via CBAT TOCP)
- All Sky Automated Survey for SuperNovae (ASAS-SN) (reported by J. Brimacombe et al. in ATel #11275)

Alert Notice 614 : Monitoring of GW Lib to support XMM-Newton observation

February 12, 2018: Dr. Koji Mukai (NASA Goddard Space Flight Center) and colleagues have requested AAVSO observations of the WZ Sge type dwarf nova GW Lib in support of observations with the ESA XMM-Newton spaceobservatory scheduled for

2018 February 17  05:46:41 - 21:36:41 UT

Solar Bulletin - Volume 74, Number 1

The January Solar Bulletin is now available. Please visit the Solar Bulletin web page to download your copy: https://www.aavso.org/solar-bulletin

The January SID Data report is available here: https://www.aavso.org/sid-database

Alert Notice 613: Nova Cir 2018 - PNV J13532700-6725110

January 31, 2018

Event: Nova in Circinus  -  Nova Cir 2018 = PNV J13532700-6725110

Discovered by: John Seach (Chatsworth Island, NSW, Australia)

Discovery magnitude: 9.1 unfiltered CCD (on three images, using DSLR with 50 mm f/1.2 lens)

Alert Notice 612: Nova Sco 2018 - PNV J17180658-3204279

January 31, 2018

Event: Nova in Scorpius  -  Nova Sco 2018 = PNV J17180658-3204279

Discovered by: Hideo Nishimura (Kakegawa, Shizuoka-ken, Japan), reported by S. Nakano (Sumoto, Japan)

Discovery magnitude: unfiltered CCD magnitude 11.0 (three 10-second images using DSLR with 200-mm f/3.2 lens)

Discovery date: 2018 January 17.869 UT
 
Coordinates (2000.0): R.A. 17 18 06.37  Decl. -32 04 27.7 (from VSX)

LPV of the Month February, 2018

Z Tauri

Z Tau is an interesting Mira that has been observed by AAVSO observers and members since 1904.  Nearly 6,000 observations are in the AID from over 400 different observers as can be seen in the light curve shown below which displays all observations in the AID.  It is not one of the Legacy LPV Program stars, however there is a good reason why it deserves some special attention! 

Alert Notice 611: Flaring of Blazar 3C 279

January 26, 2018: AAVSO member/observer Adolfo Darriba (Madrid, Spain) informs us that Dr. Dave Thompson, Multiwavelength Coordinator for the Large Area Telescope (LAT) of NASA's Fermi Gamma-Ray Telescope, on behalf of the Fermi LAT Collaboration has called for observations of the blazar 3C 279, which is undergoing a major gamma-ray flare.

Alert Notice 610: Anticipated primary eclipse of b Persei by the third star

January 26, 2018: An AAVSO campaign on the bright star b Per has been launched at the request of Dr. Donald F. Collins, who writes:

Solar Bulletin - Volume 73, Number 12

The December Solar Bulletin is now available. Please visit the Solar Bulletin web page to download your copy: https://www.aavso.org/solar-bulletin

The December SID Data report is available here: https://www.aavso.org/sid-database

Pages

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