TNS Astronomical Transient Report No. 170083 [ 2023TNSTR.214....1E ]

Date Received (UTC): 2023-01-27 19:20:45
Date made public:
Sender: Michael Engesser
Reporting Group: None     Discovery Data Source: JWST-ERS

Michael Engesser report/s the discovery of a new astronomical transient.

IAU Designation: AT 2023axi
Discoverer internal name: joust2023y
Coordinates (J2000): RA = 15:34:57.494 (233.7395574) DEC = +23:30:14.30 (23.5039729)
Discovery date: 2023-01-14 13:00:00.288 (JD=2459959.0416666)

Potential host galaxy: Arp 220
Host redshift: 0.0184

Remarks: Red source detected in JWST NIRCam data (PID 2739) on MJD 59764. Preliminary AB magnitudes of the target are measured via simple aperture photometry using current JWST photometric calibration estimates.

Photometry

Discovery (first detection):
Discovery date: 2023-01-14 13:00:00.288
Flux: 21.4 ABMag
Filter: F444W-JWST
Instrument: NIRCam
Telescope: James Webb Space Telescope

Last non-detection:
Last non-detection date: 2019-09-04 00:00:00
Limiting flux: 25 ABMag
Filter: Other-
Instrument: WFC3
Telescope: Hubble Space Telescope

Remarks: F160W

Details of the new object can be viewed here: https://www.wis-tns.org/object/2023axi