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ATCA non-detection of TDE candidate OGLE17aaj

ATel #10025; E. R. Stanway (Warwick), A. J. Levan (Warwick), G. C. Brown (Warwick)
on 30 Jan 2017; 13:52 UT
Credential Certification: Andrew Levan (A.J.Levan@warwick.ac.uk)

Subjects: Radio, AGN, Transient, Tidal Disruption Event

We observed TDE candidate OGLE17aaj (A-Tels #10006, #9977) at 5.5 and 9.0 GHz with the Australia Telescope Compact Array (ATCA). The simultaneous observations commenced at 2017 Jan 28 06:06UT and continued for 90 minutes on-source, ending at 08:02UT. The standard source PKS1934-638 was used for flux calibration, and J0252-712 for phase calibration. The array was in the 750B configuration, giving a beam of 39 x 4.9 arcseconds at a position angle of -6.4 degrees.

We do not detect the target source at either frequency.

We note that assigning an absolute flux limit is complicated by the large beam and the presence of an unrelated 14mJy source at RA,Dec=01:56:21.9,-71:05:43.19. We measure a local rms at the location of the TDE of 46 microJy at 5.5 GHz and 53 microJy at 9.0 GHz.

These observations were associated with NAPA programme C3098 (PI: Stanway).