May 23, 2012: IAU Central Bureau Electronic Telegram 3111 (Daniel W. E. Green, ed.) announces the LOSS discovery (reported by M. Kandrashoff, S. B. Cenko, W. Li, and A. V. Filippenko) of a supernova in NGC 4424 on 2012 May 17.22 at unfiltered magnitude 16.9.
Spectra indicating the object to be a Type Ia supernova discovered about two weeks before maximum were obtained by:
September 16, 2011: Dr. Bradley Schaefer (LSU) requests fast time series of SN 2011fe over the next several weeks to attempt the detection of fast optical variations in supernova light.
The following request was prepared by Dr. Schaefer which we forward at his request:
On 13 September, 2011, we had the good fortune to have Dr. Michael Richmond, Physics Professor and Observatory Director for the Rochester Institute of Technology in New York chat with us about SN 2011fe and supernova photometry in general. Here is the transcript from that chat session.
Discovered by: The Type Ia supernova science working group of the Palomar Transient Factory: Peter Nugent, Lawrence Berkeley National Laboratory (LBL), University of California at Berkeley; Mark Sullivan, Oxford University; David Bersier, Liverpool John Moores University (LJMU); D. A. Howell, Las Cumbres Observatory Global Telescope Network Inc., University of California at Santa Barbara; Rollin Thomas, LBL; Phil James, LJMU
August 24, 2011: P. Nugent et al. report in ATel #3581 that a possible Type-Ia supernova has been discovered by the Palomar Transient Factory shortly after eruption in the galaxy M101 and has been designated "PTF11kly". The object is currently at a magnitude of g=17.2, but may well rise by several magnitudes. The object is well placed within M101 for good photometry, and observations of this potential bright SNIa are strongly encouraged.
The (J2000) coordinates reported for the object are
April 28, 2011: In AAVSO Alert Notice 438 on Supernova 2011by in NGC 3972 (issued 2011 April 28), the position was attributed to the wrong object. Here is the corrected text:
Position: R.A. = 11:55:45.56 Decl. = +55:19:33.8 (equinox 2000.0)
SN 2011by is about 5.3" east and 19.1" north of the center of NGC 3972.
Sincere apologies for the error.
This Alert Notice was issued by Elizabeth O. Waagen.
