TNS Astronomical Transient Report No. 259438 [ 2025TNSTR2316....1C ]
Date Received (UTC): 2025-06-20 19:48:21
Date made public:
Sender: TSST_COSMOS_bot
Reporting Group: TSST_COSMOS_3D Discovery Data Source: TSST_COSMOS_3D
D. A. Coulter, on behalf of the TSST and COSMOS-3D teams. report/s the discovery of a new astronomical transient.
IAU Designation: AT 2025oii
Discoverer internal name: COSMOS_3D_NH_22
Coordinates (J2000): RA = 10:00:45.030 (150.187627) DEC = +02:15:09.58 (2.25266129)
Discovery date: 2025-04-26 00:00:00.000 (JD=2460791.5)
Remarks: Hostless
Photometry
Discovery (first detection):
Discovery date: 2025-04-26 00:00:00.000
Flux: 26.2 ABMag
Filter: F200W-JWST
Instrument: NIRCam
Telescope: James Webb Space Telescope
Last non-detection:
Archival info: Other
Remarks: This source was not detected in Public Release IMaging for Extragalactic Research images (PRIMER; Cycle 1, GO 1837; https://primer-jwst.github.io/observations.html).
Details of the new object can be viewed here: https://www.wis-tns.org/object/2025oii
Date Received (UTC): 2025-06-20 19:48:21
Date made public:
Sender: TSST_COSMOS_bot
Reporting Group: TSST_COSMOS_3D Discovery Data Source: TSST_COSMOS_3D
D. A. Coulter, on behalf of the TSST and COSMOS-3D teams. report/s the discovery of a new astronomical transient.
IAU Designation: AT 2025oii
Discoverer internal name: COSMOS_3D_NH_22
Coordinates (J2000): RA = 10:00:45.030 (150.187627) DEC = +02:15:09.58 (2.25266129)
Discovery date: 2025-04-26 00:00:00.000 (JD=2460791.5)
Remarks: Hostless
Photometry
Discovery (first detection):
Discovery date: 2025-04-26 00:00:00.000
Flux: 26.2 ABMag
Filter: F200W-JWST
Instrument: NIRCam
Telescope: James Webb Space Telescope
Last non-detection:
Archival info: Other
Remarks: This source was not detected in Public Release IMaging for Extragalactic Research images (PRIMER; Cycle 1, GO 1837; https://primer-jwst.github.io/observations.html).
Details of the new object can be viewed here: https://www.wis-tns.org/object/2025oii