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EVLA Observations of an Extremely Young Type Ia Supernova PTF10ygu

ATEL # 2957; Mansi Kasliwal (Caltech), Dale Frail (NRAO), Peter Nugent (LBNL), Andy Howell (LCOGT/UCSB), Mark Sullivan (Oxford), Avishay Gal-Yam (Weizmann Institute), Iair Arcavi (Weizmann Institute), Eran Ofek (Caltech) Robert Quimby (Caltech), Shri Kulkarni (Caltech), Fang Yuan (U. Michigan), Carl Akerlof (U. Michigan), and Tim McKay (Minnesota) report on behalf of the Palomar Transient Factory collaboration
on 20 Oct 2010; 2:16 UT
Password Certification: Mansi Manoj Kasliwal (

Subjects: Radio, Optical, Nova, Supernova, Transients

We triggered our NRAO Target Of Opportunity program "Exploring Transients in the Local Universe" and used the Expanded Very Large Array (EVLA) to observe PTF10ygu (ATEL#2934), an extremely young Type Ia supernova discovered by the Palomar Transient Factory. The EVLA observations were made on 2010 October 16.68 UT, when this Type Ia supernova was two weeks before maximum light (based on contemporaneous spectroscopy), one of the youngest supernovae to be observed in the radio.

We detect no radio emission at a center frequency of 8.396 GHz to a 3-sigma limit of 150 microJy. Further observations are planned.

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R. E. Rutledge , Editor
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