TNS Astronomical Transient Report No. 263230 [ 2025TNSTR2805....1H ]
Date Received (UTC): 2025-07-21 02:42:15
Date made public:
Sender: Lei Hu
Reporting Group: JCAST Discovery Data Source: None
Lei Hu (CMU), Bangzheng Sun (University of Missouri), Haojing Yan (University of Missouri), Lifan Wang (TAMU), Tianqing Zhang (Pitt), Yuhan Chen (UCB), Brendan O'Connor (CMU), Antonella Palmese (CMU), Xander Hall (CMU) report/s the discovery of a new astronomical transient.
IAU Designation: AT 2025rth
Discoverer internal name: 20250622F200W141942339p525500352
Coordinates (J2000): RA = 14:19:42.339 (214.92641456) DEC = +52:55:00.35 (52.91676444)
Discovery date: 2025-06-22 10:05:31.000 (JD=2460848.9204977)
Host redshift: 3.62
Remarks: We report on the detection of a transient candidate in JWST observations of EGS field. It was discovered in NIRCam observations of GO Program 5398 (PI: Jeyhan Kartaltepe) using SFFT image subtraction code. We used archival NIRCam data provided by ERS Program 1345 (CEERS; PI: Steven L. Finkelstein) as reference. The transient search is part of JWST Archival Research Program 5965 (JCAST; PIs: Lei Hu & Lifan Wang).
Photometry
Discovery (first detection):
Discovery date: 2025-06-22 10:05:31.000
Flux: 29.08 ABMag
Filter: F200W-JWST
Instrument: NIRCam
Telescope: James Webb Space Telescope
Last non-detection:
Archival info: DSS
Details of the new object can be viewed here: https://www.wis-tns.org/object/2025rth
Date Received (UTC): 2025-07-21 02:42:15
Date made public:
Sender: Lei Hu
Reporting Group: JCAST Discovery Data Source: None
Lei Hu (CMU), Bangzheng Sun (University of Missouri), Haojing Yan (University of Missouri), Lifan Wang (TAMU), Tianqing Zhang (Pitt), Yuhan Chen (UCB), Brendan O'Connor (CMU), Antonella Palmese (CMU), Xander Hall (CMU) report/s the discovery of a new astronomical transient.
IAU Designation: AT 2025rth
Discoverer internal name: 20250622F200W141942339p525500352
Coordinates (J2000): RA = 14:19:42.339 (214.92641456) DEC = +52:55:00.35 (52.91676444)
Discovery date: 2025-06-22 10:05:31.000 (JD=2460848.9204977)
Host redshift: 3.62
Remarks: We report on the detection of a transient candidate in JWST observations of EGS field. It was discovered in NIRCam observations of GO Program 5398 (PI: Jeyhan Kartaltepe) using SFFT image subtraction code. We used archival NIRCam data provided by ERS Program 1345 (CEERS; PI: Steven L. Finkelstein) as reference. The transient search is part of JWST Archival Research Program 5965 (JCAST; PIs: Lei Hu & Lifan Wang).
Photometry
Discovery (first detection):
Discovery date: 2025-06-22 10:05:31.000
Flux: 29.08 ABMag
Filter: F200W-JWST
Instrument: NIRCam
Telescope: James Webb Space Telescope
Last non-detection:
Archival info: DSS
Details of the new object can be viewed here: https://www.wis-tns.org/object/2025rth