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cataclysmic variable

Alert Notice 551: GDS_J1701281-430612 monitoring for HST observations

Note added September 27, 2016: Dr. Reynolds adds the following: "Visual observations would be useful in setting a baseline and understanding how variable the source is in a relative sense at the time of our HST observation."

September 20, 2016: Dr. Mark Reynolds (University of Michigan) and colleagues have requested AAVSO assistance in monitoring the cataclysmic variable GDS_J1701281-430612 in support of HST/COS observations scheduled for early October.

Alert Notice 545: FO Aqr time-series observations requested

July 13, 2016: Dr. Colin Littlefield (University of Notre Dame) and colleagues Drs. Peter Garnavich (Notre Dame), Erin Aadland (Minnesota State), and Mark Kennedy (University College Cork) have requested AAVSO assistance in monitoring the intermediate polar cataclysmic variable FO Aqr beginning immediately.

Dr. Littlefield, who with his colleagues recently published ATel #9216 and #9225, writes:

Special Notice #42: Outburst of GW Lib

April 12, 2007

Rod Stubbings reports via Daisaku Nogami/VSNET that the cataclysmic variable GW Lib is currently in outburst, at a visual magnitude of 13.8. Follow-up observations are urgently requested. The object is located at

RA: 15h 19m 55.4s, Dec: -25d 00m 25s (J2000)

An AAVSO chart is available at the following URL:

http://www.aavso.org/cgi-bin/searchcharts3.pl?name=GW%20Lib]

2016 link: https://www.aavso.org/vsp

 

Special Notice #26: Possible Minor Outburst of 0324+43 GK Persei

December 15, 2006

Coordinates: 03:31:11.82 +43:54:16.8 (2000.0)

Recent observations of the old nova intermediate polar magnetic catclysmic variable GK Per (Nova Per 1901) show the star brighter than minimum. However, it is too early to tell if an outburst is underway.

Alert Notice (un-numbered July 31, 1974): AAVSO Alert Notices

July 31, 1974

THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
187 Concord Avenue, Cambridge, MA 02138 USA
Tel. 617-354-0484

AAVSO ALERT NOTICES

URGENT SPECIAL REQUEST

Pages

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