DRAFT
2021-12-08 12:37:21
Type: Object/s-Data/Analysis
Bibcode: 2021TNSAN.309....1A
Radio non-detections of 3 TDEs
Authors: Kate D. Alexander (Northwestern U.), Adelle J. Goodwin, James Miller-Jones (ICRAR - Curtin), Sjoert van Velzen (Leiden U.), Tarraneh Eftekhari, Aprajita Hajela (Northwestern U.), Tanmoy Laskar (Radboud U.), Yvette Cendes (Harvard U.), on behalf of a larger collaboration
Keywords: TDE, Transient, Radio
Abstract:
We report radio non-detections of three TDEs: AT2021ehb, AT2021mhg, and AT2021nwa.

We report new radio observations taken as part of our VLA Large Program dedicated to tidal disruption events (TDEs). Following their public classification by ZTF (Gezari et al. 2021, AstroNote 2021-103; TNS Classification Report No. 10315; TNS Classification Report No. 9924), we observed the TDEs AT2021ehb, AT2021mhg, and AT2021nwa with NSF's Karl G. Jansky Very Large Array (VLA). The data were reduced in CASA using NRAO's standard VLA calibration pipeline. We report the non-detection of radio emission to the 3-sigma upper limits listed below. Further observations are planned to check for late-rising radio emission.

Our VLA Large Program (20B-377) began in December 2020 and will continue until 2023. We plan to target new publicly-reported TDEs discovered at z < 0.1, to determine the prevalence of radio emission in TDEs. We will report new results from this program to the community via ATels, TNS AstroNotes, and on our program website (https://sites.northwestern.edu/radiotdes/). For collaboration, or to suggest new targets, please contact the program PI (Kate Alexander, kate.alexander@northwestern.edu) or one of the program co-Is.

Show current TNS values
Catalog Name Reported RA Reported DEC Reported Obj-Type Reported Redshift Host Name Host Redshift Date Observed (UT) Mean Obs Freq (GHz) Upper Limit (uJy) Remarks TNS RA TNS DEC TNS Obj-Type TNS Redshift
TNS 2021ehb [ZTF21aanxhjv] 03:07:47.806 +40:18:40.57 TDE 0.017 WISEA J030747.82+401840.9 2021 Mar 28.85 15 20 03:07:47.806 +40:18:40.57 TDE 0.018
TNS 2021mhg [ZTF21abaxaqq] 00:19:42.900 +29:19:00.70 TDE 0.073 SDSS J001942.89+291900.6 2021 Aug 20.31 15 14 00:19:42.900 +29:19:00.70 TDE 0.073
TNS 2021nwa [ZTF21abcgnqn] 15:53:51.279 +55:35:19.67 TDE 0.047 2021 Jul 17.09 15 19 15:53:51.279 +55:35:19.67 TDE 0.047
AstroNote Publication Timestamp Title Authors
2021-103 2021-03-26 13:33:55 ZTF21aanxhjv/AT2021ehb: ZTF discovery of a young, UV-bright tidal disruption event Suvi Gezari (STScI), Erica Hammerstein (UMD), Yuhan Yao (Caltech), Sjoert van Velzen (Leiden), Brad Cenko (NASA/Goddard), Shri Kulkarni, Matthew Graham, Jean Somalwar, and Vikram Ravi (Caltech)
2021-183 2021-07-01 21:14:00 AT2021ehb/ZTF21aanxhjv: Tidal Disruption Event that is Brightening in the X-rays Yuhan Yao (Caltech), Murray Brightman (Caltech), Suvi Gezari (STScI), Sjoert van Velzen (Leiden University), Erica Hammerstein (UMD), Jean Somalwar (Caltech), S. R. Kulkarni (Caltech), on behalf of the ZTF Collaboration
2021-24 2021-01-20 18:28:05 Radio detections of TDEs AT2020ksf and AT2020zso Kate D. Alexander (Northwestern U.), Sjoert van Velzen (Leiden U.), James Miller-Jones, Gemma Anderson (Curtin U.), Edo Berger, Yvette Cendes (Harvard U.), Ryan Chornock, Deanne Coppejans (Northwestern U.), Tarraneh Eftekhari (Harvard U.), Suvi Gezari (STScI), Adelle Goodwin (Curtin U.), Aprajita Hajela (Northwestern U.), Tanmoy Laskar (U. of Bath), Andrew MacFadyen (NYU), Raffaella Margutti (Northwestern U.), Dheeraj Pasham (MIT), Enrico Ramirez-Ruiz (UCSC), Richard Saxton (ESA)

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