[ Previous | Next | ADS ]

Discovery and Type Identification for New Supernova

ATel #411; The Nearby Supernova Factory: G. Aldering, B. C. Lee, S. Loken, P. Nugent, S. Perlmutter, R. Scalzo, R. C. Thomas, L. Wang (Lawrence Berkeley National Laboratory, Berkeley, CA), C. Bonnaud, E. Pecontal (Centre de Recherche Astronomique de Lyon), N. Blanc, S. Bongard, Y. Copin, E. Gangler, L. Sauge, G. Smadja (Institut de Physique Nucleaire de Lyon), R. Kessler (Kavli Institute for Cosmological Physics, Chicago, IL), P. Antilogus, G. Garavini, S. Gilles, R. Pain (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), C. Baltay, D. Rabinowitz, A. Bauer (Yale)
on 15 Feb 2005; 22:57 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Peter Nugent (penugent@lbl.gov)

Subjects: Optical, Supernovae

The Nearby Supernova Factory reports the discovery of a supernova, SNF20050203-000, with NEAT images taken on the Palomar Oschin Schmidt telescope Feb. 3.45 UT as part of the Palomar-QUEST Survey. At discovery the supernova had an unfiltered magnitude of 18.0. It is located at RA = 10:24:12.9, Dec = -03:44:50.6 (J2000), which is 6.0" W and 0.4" N of the host, LCRS B102141.5-032936. A spectrum (range 330-990 nm) of SNF20050203-000 obtained on Feb. 15.47 UT with the SuperNova Integral Field Spectrograph on the University of Hawaii 2.2m telescope, reveals it to be a Type IIn supernova well after maximum light at the redshift of the host galaxy, z = 0.031. It is similar to SN 1994Y (Clocchiatti et al., IAUC # 6065 ) more than 100 days after discovery. Present in the spectrum are broad emission features (fwhm approximately 5000 km/s) due to H-alpha, H-beta and the Ca II H&K and IR triplet lines.