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Expanded VLA observations of Type IIn supernova SN 2010al

ATel #2532; Poonam Chandra (RMC, Canada), Alicia Soderberg (CfA, Harvard), Roger Chevalier (UVA, Charlottesville), Claes Fransson (Stockholm observatory) and Nikolai Chugai (INASAN, Russia)
on 2 Apr 2010; 22:28 UT
Credential Certification: Poonam Chandra (poonam.chandra@rmc.ca)

Subjects: Radio, Nova, Supernovae

We observed the Type IIN supernova SN 2010al (Rich et al, CBET #2207), which has shown its early spectrum similar to SN 1998S (Cooke et al. ATel #2491) with the Expanded VLA (EVLA; Perley et al. 2009, IEEEP, 97, 1448) in D configuration beginning at Mar 26.25 UT for a duration of 1.0 hr. The observations were carried out at a central frequency of 8.396 GHz with a total bandwidth of 256 MHz. The map rms was 17 uJy. The supernova lies in the radio bright star forming (SF) region of host galaxy UGC 4286 and hence difficult to separate out the flux. However, mapping only with long baselines (>10 klambda), we attempt to get rid of extended SF region and have a tentative detection of 2-sigma flux of 100 uJy at the SN position. We are grateful to the EVLA commissioning staff for making this target-of-opportunity observation possible.