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GCN Circular 34022

Subject
ZTF23aaoohpy/AT2023lcr: Zwicky Transient Facility discovery of a fast fading red transient
Date
2023-06-19T17:12:17Z (10 months ago)
From
Igor Andreoni at JSI/UMD/NASA <igor.andreoni@gmail.com>
Vishwajeet Swain (IITB), Igor Andreoni (JSI/UMD/NASA-GSFC), Michael Coughlin (UMN), Harsh Kumar (IITB), Anirudh Salgundi (IITB) on behalf of the ZTF Collaboration


We report the discovery of the fast fading transient candidate ZTF23aaoohpy/AT2023lcr with the Zwicky Transient Facility (ZTF, Bellm et al. 2019, Graham et al. 2019) at coordinates:

RA = 16:31:37.40   (247.9058524d)
Dec = +26:21:58.35 (26.3662079d)

ZTF23aaoohpy was first detected on 2023-06-18 06:36:27 UT at g = 19.658 +- 0.141 mag (AB). ZTF23aaoohpy faded by about ~1.0 magnitudes per day in both g- and r-band. The non-detection limiting magnitude of 21.1 was measured in g-band on 2023-06-17 09:39:58 UT, which is about 23 hours before the first detection. There is no pre-detection at the transient location in the last 80 images of the field previously acquired by the ZTF survey. ZTF photometry is reported in the following table:

----------------------------------
     MJD       |     mag AB
----------------------------------
60113.275313 | g = 19.66 +- 0.14
60114.279398 | g = 20.67 +- 0.27
60113.337488 | r = 19.37 +- 0.10
60114.341065 | r = 20.38 +- 0.19
----------------------------------

Extinction along the line of sight is small, with E(B-V)=0.05 mag. The transient is located at high Galactic latitude b=41.25 deg. There is no cataloged source at the transient location in deep Legacy Survey DR10 and Pan-STARRS (Chambers et al., 2016) archival images.


Follow-up observations are encouraged.

ZTF23aaoohpy was discovered by the ''ZTF Realtime Search and Triggering'' project (ZTFReST; Andreoni & Coughlin et al., 2021) within the ZTF Collaboration.


Based on observations obtained with the Samuel Oschin Telescope 48-inch and the 60-inch Telescope at the Palomar Observatory as part of the Zwicky Transient Facility project. ZTF is supported by the National Science Foundation under Grant No. AST-2034437 and a collaboration including Caltech, IPAC, the Weizmann Institute for Science, the Oskar Klein Center at Stockholm University, the University of Maryland, Deutsches Elektronen-Synchrotron and Humboldt University, the TANGO Consortium of Taiwan, the University of Wisconsin at Milwaukee, Trinity College Dublin, Lawrence Livermore National Laboratories, and IN2P3, France. Operations are conducted by COO, IPAC, and UW.
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