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ATCA Observations of AT2018cow

ATel #11795; Dougal Dobie (University of Sydney), Vikram Ravi (Caltech), Anna Ho (Caltech), Mansi Kasliwal (Caltech), Tara Murphy (University of Sydney)
on 29 Jun 2018; 15:52 UT
Credential Certification: Dougal Dobie (ddob1600@uni.sydney.edu.au)

Subjects: Radio, Transient

Referred to by ATel #: 11818

We have observed the position of AT2018cow (ATel #11727) with the Australia Telescope Compact Array (ATCA) on 2018-06-26 from 09:00-14:00 UT at central frequencies of 5.5 GHz, 9 GHz with a bandwidth of 2 GHz in each band, and 34 GHz with a bandwidth of 4 GHz. Due to maintenance, only four of six antennas were available, and only three antennas were used at 34 GHz. We detect a point source coincident with the location of AT2018cow (ATel #11727) and report preliminary flux densities of: <0.18 mJy at 5.5 GHz (3-sigma upper limit); ~0.46 mJy at 9 GHz; ~5.6 mJy at 34 GHz. Analysis is ongoing and subsequent epochs are planned. Thank you to CSIRO staff for supporting these observations.