DRAFT
2023-12-12 22:22:00
Type: Object/s-Discovery/Classification
Bibcode: 2023TNSAN.336....1S
Classification of the optical transient ZTF23abgnxfv/AT2023tmq as a tidal disruption event at z=0.0779
Authors: Jean Somalwar (Caltech), Ryan Chornock (Berkeley), Vikram Ravi (Caltech), Yuhan Yao (Caltech), on behalf of the ZTF TDE/AGN Science Working Group
Keywords: TDE
Abstract:
We report the classification of the optical transient ZTF23abgnxfv/AT2023tmq as a tidal disruption event (TDE) due to its persistent blue optical colors and follow-up optical spectroscopy.

We report the classification of the optical transient ZTF23abgnxfv/AT2023tmq (RA = 09:19:05.90, Dec = +13:26:53.02, z = 0.0779) as a tidal disruption event (TDE) due to its persistent blue optical colors and follow-up optical spectroscopy.

ZTF23abgnxfv/AT2023tmq was first reported to TNS by the Zwicky Transient Facility (ZTF) on 2023 Sep 24. It was first detected in the r band by ZTF on 2019 Sep 24. The rise was not detected, and the source remained at a plateau for the first ~35 days post-detection, with a typical magnitude near g = 18.60 +/- 0.09 and r = 18.83+0.12. The source faded afterwards.

We triggered a follow-up observation with the LRIS optical spectrograph on the Keck I Telescope and a spectrum was taken on 2023 Nov 7. This follow-up spectrum displayed broad H-alpha and He II emission and probable broad He I emission, with host galaxy absorption lines implying a redshift of z = 0.0779.

Our Swift follow-up observations on 2023 Nov 16 show no X-ray source in the XRT image.

Based on the blue optical colors and follow-up optical spectroscopy we classify ZTF23abgnxfv as a TDE.

Show current TNS values
Catalog Name Reported RA Reported DEC Reported Obj-Type Reported Redshift Host Name Host Redshift Remarks TNS RA TNS DEC TNS Obj-Type TNS Redshift
TNS 2023tmq [ZTF23abgnxfv] 09:19:05.890 +13:26:52.80 TDE SDSS J091905.90+132652.4 0.07785505 09:19:05.890 +13:26:52.80 TDE

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