Three Type Ia Supernovae: SN 2005eu, SNF20051003-003, SNF20051004-001

ATel #620; The Nearby Supernova Factory: G. Aldering, S. Bailey, D. Kocevski, B. C. Lee, S. Loken, P. Nugent, S. Perlmutter, R. Scalzo, R. C. Thomas, L. Wang, B. A. Weaver (Lawrence Berkeley National Laboratory, Berkeley, CA), P. Antilogus, S. Gilles, R. Pain, R. Pereira (Laboratoire de Physique Nucleaire et de Haute Energies de Paris), N. Blanc, S. Bongard, Y. Copin, E. Gangler, L. Sauge, G. Smadja (Institut de Physique Nucleaire de Lyon), C. Bonnaud, E. Pecontal (Centre de Recherche Astronomique de Lyon), R. Kessler (Kavli Institute for Cosmological Physics, Chicago, IL), C. Baltay, D. Rabinowitz, A. Bauer (Yale)
on 6 Oct 2005; 19:07 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: R. C. Thomas (rcthomas@lbl.gov)

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The Nearby Supernova Factory reports that a preliminary spectrum (range 320-1000 nm) of SN 2005eu (IAUC # 8611 ), obtained Oct 6.5 UT with the Supernova Integral Field Spectrograph (SNIFS) on the University of Hawaii 2.2-meter telescope exhibits weak Si II 6100 AA absorption, Ca II IR triplet and S II "W." The supernova appears to be a Type Ia supernova approximately one week prior to maximum light. Host H-alpha, [N II] and [S II] emission features indicate a redshift of z = 0.0349.

The Nearby Supernova Factory also reports the discovery of two new supernovae.

SNF20051003-003 (coordinates RA=02:31:04.93, DEC=+27:42:06.5 J2000.0) in UGC 1990 (redshift z = 0.0154, de Vaucouleurs et al. 1991 RC3.9 via NED) was discovered in an image obtained Oct 3.4 with the QUEST II camera on the Palomar Oschin 48-inch telescope as a part of the JPL Near-Earth Asteroid Tracking component of the Palomar-QUEST survey. The supernova had an unfiltered magnitude of 16.0 (calibrated to R) at discovery and was confirmed photometrically on Oct 6.4 UT with the Lick 1-m Nickel Reflector. A spectrum (range 320-1000 nm), obtained Oct 6.6 UT with SNIFS shows it to be a Type Ia supernova one month past maximum light, similar to SN 1999aa (Garavini et al. 2004 AJ 128, 387) and SN 1996X (Salvo et al. 2001 MNRAS 321, 254) at this phase corrected to the restframe of UGC 1990.

SNF20051004-001 (coordinates RA=03:39:23.74, DEC=+35:02:49.0) in an anonymous galaxy was discovered in an image obtained Oct 4.5 with the QUEST II camera. The supernova had an unfiltered magnitude of 15.1 (calibrated to R) at discovery and was confirmed photometrically on Oct 6.4 UT with the Lick 1-m Nickel Reflector. A spectrum (range 320-1000 nm), obtained Oct 6.6 UT with SNIFS shows it to be a Type Ia supernova two weeks past maximum light, similar to SN 1999ee (Hamuy et al. 2002 AJ 124, 417) at this phase. The redshift derived from comparing the spectrum of SN 1999ee to that of the new object, suggests a redshift z = 0.003.