DRAFT
2023-12-21 20:27:18
Type: Object/s-Discovery/Classification
Bibcode: 2023TNSAN.354....1S
Classification of the optical transient ZTF23abohtqf/AT2023xen as a tidal disruption event at z=0.1335
Authors: Jean Somalwar (Caltech), Ryan Chornock (Berkeley), Vikram Ravi (Caltech), Yuhan Yao (Berkeley), Erica Hammerstein (UMD) on behalf of the ZTF TDE/AGN Science Working Group
Keywords: TDE
Abstract:
We report the classification of the optical transient ZTF23abohtqf/AT2023xen (RA = 07:52:12.679, Dec = +37:21:34.15, z = 0.1335) 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 ZTF23abohtqf/AT2023xen (RA = 07:52:12.679, Dec = +37:21:34.15, z = 0.1335) as a tidal disruption event (TDE) due to its persistent blue optical colors and follow-up optical spectroscopy.

ZTF23abohtqf/AT2023xen was first reported to TNS by the Zwicky Transient Facility (ZTF) on 2023 Oct. 21. It was first detected in the g band by ZTF on 2023 Oct 21. The source rose to a peak ~20 days after the first detection , with a typical magnitude near g = 19.1 and r = 19.3. 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 18. This follow-up spectrum displayed broad H-alpha and possible He II emission, with host galaxy absorption lines implying a redshift of z = 0.1335.

Based on the blue optical colors and follow-up optical spectroscopy we classify ZTF23abohtqf as a TDE.

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