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3 New Supernova Discoveries/Classifications

ATEL # 2174; Peter Nugent (Lawrence Berkeley National Laboratory), Mark Sullivan (University of Oxford) & D. Andrew Howell (LCOGT)
on 25 Aug 2009; 12:48 UT
Distributed as an Instant Email Notice (Supernova)
Password Certification: Peter Nugent (

Subjects: Optical, Request for Observations

The Type Ia supernova science working group of the Palomar Transient Factory (ATEL#1964) reports the discovery of three nearby supernova. Confirmation spectra were taken on the Double Beam Spectrograph on the Palomar Hale telescope on August 19 UT by R. Ellis and J. Cooke. Classification of the spectra were carried out using Superfit (Howell et al. 2005). As all three are quite young, STIS/UV spectroscopic observations on the Hubble Space Telescope were triggered by the ToO program "Verifying the Utility of Type Ia Supernovae as Cosmological Probes: Evolution and Dispersion in the Ultraviolet Spectra " (PI: R. Ellis). We strongly encourage additional follow-up of these sources at all wavelengths.

        Name          RA           Dec          z     phase     disc     mag (R-band)   ----------------------------------------------------------------------------   PTF09dnl 17:23:41.804  +30:29:49.5    0.03     -15    Aug 17.3      18.5   PTF09dlc 21:46:30.103  +06:25:09.2    0.07     -11    Aug 17.3      19.2   PTF09dnp 15:19:24.432  +49:29:56.4    0.04     -10    Aug 18.2      17.6      

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