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Radio Non-Detection of SN 2017ahn

ATel #10147; S. D. Ryder (AAO), E. C. Kool (Macquarie University/AAO), C. J. Stockdale (Marquette), R. Kotak (QUB), C. Romero-Canizales (UDP, MAS), G. Anderson (Curtin, ICRAR), S. Amy (CASS)
on 6 Mar 2017; 22:28 UT
Credential Certification: Stuart Ryder (sdr@aao.gov.au)

Subjects: Radio, Supernovae, Transient

The Type II SN 2017ahn (ATel #10058, #10059, #10066, #10067) in the galaxy NGC 3318 has been observed with the Australia Telescope Compact Array (ATCA) at 5.5 and 9.0 GHz on 2017 Feb 28.6 UT. No radio emission was detected at the reported location, to a 3-sigma upper limit of 75 microJy/beam (5.5 GHz) and 40 microJy/beam (9.0 GHz). Adopting the host galaxy distance and explosion date from Tartaglia et al. (ATel #10058) this implies an upper limit on the 5.5 GHz luminosity at an age of 20 days of 1.28E26 erg/s/Hz. We would like to extend our thanks to the ATCA staff for enabling these observations. The Australia Telescope Compact Array is funded by the Commonwealth of Australia for operation as a National Facility managed by CSIRO.