TNS Astronomical Transient Report No. 269135 [ 2025TNSTR3518....1H ]
Date Received (UTC): 2025-09-02 19:28:27
Date made public:
Sender: Lei Hu
Reporting Group: JCAST Discovery Data Source: None
Lei Hu (CMU), Yuhan Chen (UCB), Lifan Wang (TAMU), Haojing Yan (University of Missouri), Tianqing Zhang (Pitt), on behalf of the JCAST team report/s the discovery of a new astronomical transient.
IAU Designation: AT 2025wst
Coordinates (J2000): RA = 03:32:29.756 (53.1239825) DEC = -27:52:42.70 (-27.8785277)
Discovery date: 2025-08-24 23:56:14.000 (JD=2460912.4973843)
Host redshift: 2.5
Remarks: We report on the detection of a transient candidate in JWST observations of GOODS-S field. It was discovered in NIRCam observations of GO Program 6434 (SAPPHIRES; PI: Eiichi Egami) using image subtraction. We used archival NIRCam data provided by GO Program 1180 (PI: Daniel Eisenstein) 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: 2025-08-24 23:56:14.000
Flux: 27.21 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/2025wst
Date Received (UTC): 2025-09-02 19:28:27
Date made public:
Sender: Lei Hu
Reporting Group: JCAST Discovery Data Source: None
Lei Hu (CMU), Yuhan Chen (UCB), Lifan Wang (TAMU), Haojing Yan (University of Missouri), Tianqing Zhang (Pitt), on behalf of the JCAST team report/s the discovery of a new astronomical transient.
IAU Designation: AT 2025wst
Coordinates (J2000): RA = 03:32:29.756 (53.1239825) DEC = -27:52:42.70 (-27.8785277)
Discovery date: 2025-08-24 23:56:14.000 (JD=2460912.4973843)
Host redshift: 2.5
Remarks: We report on the detection of a transient candidate in JWST observations of GOODS-S field. It was discovered in NIRCam observations of GO Program 6434 (SAPPHIRES; PI: Eiichi Egami) using image subtraction. We used archival NIRCam data provided by GO Program 1180 (PI: Daniel Eisenstein) 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: 2025-08-24 23:56:14.000
Flux: 27.21 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/2025wst