Skip to main content

dwarf nova

Alert Notice 649: Dwarf nova outburst of GK Per (N Per 1901)

August 24, 2018: The old nova GK Per (N Per 1901), which has dwarf nova (minor) outbursts, appears to be going into outburst, according to observations reported to the AAVSO. Recent observations include:

Alert Notice 633: Nova outburst of V392 Per = TCP J04432130+4721280

April 30, 2018:

Event: Nova in Perseus - V392 Per = TCP J04432130+4721280

Discovered by: Yuji Nakamura (Kameyama, Mie, Japan; via CBET 4515)

Discovery magnitude: unfiltered CCD magnitude 6.2 (using a 135mm f4.0 lens; via CBET 4515)

Discovery date: 2018 April 29.474 UT (via CBET 4515)

Alert Notice 623: Observations of V1017 Sgr requested

March 16, 2018: Dr. Jennifer Sokoloski (Columbia University) and colleagues (led by Dr. Koji Mukai, NASA Goddard Space Flight Center) have requested AAVSO assistance in observing the nova/dwarf nova V1017 Sgr in preparation for an XMM-Newton observation scheduled for 2018 March 23 or 24.

Confirmation that the system is not in dwarf-nova outburst as of March 23 is needed so that the XMM observation may take place.

Special Notice #67: Special Notice #66 on V455 AND Corrected

September 12, 2007: Due to a typographical error, the lead sentence of AAVSO Special Notice #66 was garbled. My sincere apologies! Here is the correct version:

According to IAU Circular No. 8868 (Daniel E. W. Green, editor), N. N. Samus, Institute of Astronomy, Moscow, reports that the dwarf nova cataclysmic variable 2328+38 HS 2331+3905 has been assigned the official name V455 And. The AAVSO validation file has been changed to reflect this new name. Please use V455 AND when reporting observations.

Special Notice #66: HS 2331+3905 Named V455 And

September 12, 2007: According to IAU Circular 8868 (Daniel E. W. Green, editor), N. N. Samus, Institute of Astronomy, Moscow, reports that the dwarf nova cataclysmic variable 2328+38 HS 2331+3905 is now V455 And, and HS 2331+3905 has been assigned the official name V455 And. The AAVSO validation file has been changed to reflect this new name. Please use V455 AND when reporting observations.

V455 AND is located at RA 23:34:01.55, Dec +39:21:42.9 (J2000)

Special Notice #114: Rebrightening of the dwarf nova VY Aqr

July 22, 2008

Special Notice #116: Superoutburst of the infrequently outbursting dwarf nova HO Del

August 4, 2008

Special Notice #119: Possible rebrightening in the dwarf nova HO Del

August 19, 2008

Special Notice #122: Possible new WZ Sge-type dwarf nova in Andromeda [V466 And]

September 2, 2008

Special Notice #125: Enhanced monitoring of GK Persei

September 22, 2008

Pages

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