Radio Detection of SN 2021yja
ATel #14942; R. Z. E. Alsaberi (Western Sydney University), S. D. Ryder (Macquarie University), L. Marnoch (Macquarie University), E. Kundu (Michigan State University), M. D. Filipovic (Western Sydney University), G. Anderson (ICRAR/Curtin University), C. Stockdale (Marquette University), K. Maeda (Kyoto University), M. Renaud (LUPM, CNRS/IN2P3), R. Kotak (University of Turku)
on 29 Sep 2021; 07:33 UT
Credential Certification: Stuart Ryder (Stuart.Ryder@mq.edu.au)
Subjects: Radio, Supernovae
Following up on our earlier non-detection of the Type II SN 2021yja (ATel #14915), we re-observed the source with the Australia Telescope Compact Array (ATCA) at 9.0 and 5.5 GHz GHz on 2021 Sep 24.7 UT, and at 18.0 GHz on 2021 Sep 27.9 UT. It was detected with flux densities of 0.09 +/- 0.02 mJy at 18.0 GHz, and 0.08 +/- 0.03 mJy at 9.0 GHz, while at 5.5 GHz no source above a 3-sigma limit of 0.03 mJy was detected. This is consistent with SN 2021yja still being optically thick at centimeter wavelengths and further monitoring is planned. We would like to extend our thanks to the ATCA staff for enabling these observations. The ATCA is part of the Australia Telescope National Facility (grid.421683.a) which is funded by the Commonwealth of Australia for operation as a National Facility managed by CSIRO. We acknowledge the Gomeroi people as the traditional owners of the Observatory site.
