April 8, 2016: The symbiotic recurrent nova T CrB has entered a super-active state, and it is brighter and bluer than it has been since before its last outburst in 1946. Multicolor and visual ongoing observations are requested.
April 8, 2016:Further to AAVSO Alert Notice 532, the AAVSO is requesting ongoing time-series observations of the enigmatic variable object KIC 08462852 (= KIC 8462852) beginning immediately and continuing through at least the end of 2016.
Details on KIC 08462852 (V=11.88) were given in Alert Notice 532.
Observations are requested in order to study not only the aperiodic fading events but also the behavior of the star outside of these events.
April 5, 2016: Further to AAVSO Alert Notice 536, close monitoring of the cataclysmic variable SS Cyg is urgently requested. Immediate notification of the beginning of the anticipated outburst is crucial and is requested.
The success of the multiwavelength (radio and optical) observing campaign on SS Cyg underway depends on immediate reporting of outburst behavior to trigger multi-site radio observations.
The charts and sequences team has been busy over the last several months preparing new sequences for newly discovered objects and revised sequences intended to improve existing sequences. If you observe any of these objects please update your charts and/or sequences.
The theme of this year’s spring meeting is Pulsating Stars. The meeting will begin on Thursday evening at 6pm CDT with a keynote address by Dr. Horace Smith, Professor Emeritus of Michigan State University and a noted expert on RR Lyrae stars. Dr.
June 3, 2011: As an update to AAVSO Special Notice #241 (http://www.aavso.org/aavso-special-notice-241), the supernova in M51 has been designated SN 2011dh. Discovery, classification, and observation information have been published in IAU CBET 2736 (Daniel W. E. Green, ed.).
Coordinates: 13:30:05.08 +47:10:11.2 (J2000.0)
Coordinates source is Silverman et al., ATEL 3398
Observations should be submitted to the AAVSO International Database using the name SN 2011dh.
Independent discovery by:
- Minoru Yamamoto (Okazaki, Aichi-ken, Japan, reported via H. Yamaoka, Kyushu University)
- Yuji Nakamura (Kameyama, Mie, Japan, reported via Yamaoka)
Discovery magnitude:
- Yamamoto: ~10.6 on four 15-second frames and using a Canon 5DMRK2 camera + 135-mm lens
- Nakamura: ~10.6 on a 30-second CCD image and using a 135-mm lens
