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PTF discovers and follows-up nearby, young, Type II supernova

ATEL # 2862; M. M. Kasliwal, R.M. Quimby, E.O. Ofek, S. R. Kulkarni (CIT), A. Gal-Yam, I. Arcavi, Y.Green (WIS), E. Walker, P. Mazzali (INAF/SNS Pisa), P.E. Nugent, D. Poznanski (LBNL), D. A. Howell, B. Dilday (LCOGT) and D. B. Fox (PSU) report on behalf of the "Transients in the Local Universe" and "Core-Collapse Supernovae" working groups of the Palomar Transient Factory
on 23 Sep 2010; 21:28 UT
Distributed as an Instant Email Notice (Transients)
Password Certification: Mansi Manoj Kasliwal (

Subjects: Radio, Optical, Ultra-Violet, X-ray, Nova, Supernova, Transients
Referred to by ATEL #: 2863, 2864

On UT 2010 Sep 15.243, the Palomar Transient Factory discovered an optical transient, PTF10vdl at RA(J2000) = 23:05:49.001 and DEC(J2000)=03:31:20.50 near NGC 7483.

We obtained Target Of Opportunity spectra with Gemini-S/GMOS (PI Kasliwal) on Sep 16.29. The spectrum was extremely blue (f_nu proportional to nu^4.5) and nearly featureless. We further obtained a spectrum with the TNG/DOLORES (PI Walker) on Sep 17.40 and P-Cygni profiles of four Balmer lines were clearly visible, consistent with the redshift of NGC 7483, suggesting this is a Type II supernova.

At discovery, the transient was R=19.6 and it has been rising (e.g. R=19.0 on Sep 19.273). This currently corresponds to an absolute magnitude in R-band of -13.7. Multi-band photometric follow-up with the Palomar 60-inch, WISE observatory and LCOGT is ongoing.

We triggered UV and X-ray follow-up with the Swift Observatory. On Sep 18.3, we detect PTF10vdl at U=17.5, UVW1=17.5, UVM2=17.4 and UVW2=17.6. We are continuing monitoring with Swift/UVOT.

We thank the Gemini and SWIFT observatories for prompt scheduling of these observations.

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R. E. Rutledge , Editor
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