Supernova Discoveries: Type Ia SNF20060520-007 and Type II SNF20060520-011
ATel #822; The Nearby Supernova Factory: P. Antilogus, S. Gilles, R. Pain, R. Pereira (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), G. Aldering, S. Bailey, S. Bongard, D. Kocevski, S. Loken, P. Nugent, S. Perlmutter, R. Scalzo, R. C. Thomas, L. Wang, B. A. Weaver (Lawrence Berkeley National Laboratory, Berkeley, CA), N. Blanc, Y. Copin, E. Gangler, G. Smadja (Institut de Physique Nucleaire de Lyon), E. Pecontal, G. Rigaudier (Centre de Recherche Astronomique de Lyon), R. Kessler (Kavli Institute for Cosmological Physics, Chicago, IL), C. Baltay, D. Rabinowitz, A. Bauer (Yale)
on 25 May 2006; 04:07 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: R. C. Thomas (rcthomas@lbl.gov)
Subjects: Infra-Red, Optical, Ultra-Violet, Supernovae
The Nearby Supernova Factory reports the discovery of two supernovae in images obtained using the QUEST II camera on the Palomar Oschin 48-inch telescope as a part of the JPL Near-Earth Asteroid Tracking (NEAT) component of the Palomar Consortium. Spectra (range 320-1000 nm) of these targets obtained with the Supernova Integral Field Spectrograph (SNIFS) on the University of Hawaii 2.2-meter telescope were used for classification.
SNF20060520-007 (coordinates RA 14:33:56.76 DEC +03:47:55.6 J2000.0) was discovered in a NEAT image from May 20.3 UT at an approximate magnitude of 18.0 (calibrated to R). A SNIFS spectrum obtained May 24.5 UT reveals that it is a Type Ia supernova about 3 weeks after maximum light. Comparison to a library of supernova spectra suggests an approximate redshift of z = 0.03.
SNF20060520-011 (coordinates RA 16:19:48.80 DEC -10:03:25.2 J2000.0) was discovered in a NEAT image from May 20.4 UT at an approximate magnitude of 19.2 (calibrated to R). A SNIFS spectrum obtained May 24.5 UT reveals that it is a Type II supernova. H-alpha in net emission, with a maximum expansion velocity of 4000 km/s, is detected, along with H-beta and the Ca II IR triplet. A redshift derived from the peak of the H-alpha feature indicates z = 0.025.
