Non-detection of AT2020xnd at 34 GHz
ATel #14139; Dougal Dobie (Swinburne), Andrew O'Brien (UWM), Anna Ho (UC Berkeley), Daniel A. Perley (LJMU), David Kaplan (UWM), Yuhan Yao (Caltech), Vikram Ravi (Caltech)
on 1 Nov 2020; 01:34 UT
Credential Certification: Dougal Dobie (ddob1600@uni.sydney.edu.au)
Subjects: Radio, Millimeter, Supernovae, Transient
We observed the field of the transient AT2020xnd (ATel #14105) from 05:30-07:30 UTC on 2020-10-29 with the Australia Telescope Compact Array. Observations were carried out with two 2 GHz bands centered on 33 and 35 GHz.
After combining both bands we place a preliminary 3 sigma upper limit of 108 uJy at 34 GHz on emission from the transient. Combined with the detection of emission at 10 GHz (Astronote 2020-204), this non-detection demonstrates that the peak frequency is higher than initially expected, likely close to 100 GHz.
Further observations are planned.
Thank you to CSIRO staff for supporting these observations.
