TNS Astronomical Transient Report No. 194738 [ 2023TNSTR3105....1R ]
Date Received (UTC): 2023-11-30 04:52:46
Date made public:
Sender: Filipp Romanov
Reporting Group: None Discovery Data Source: None
Filipp Romanov report/s the discovery of a new astronomical transient.
IAU Designation: AT 2023yph
Coordinates (J2000): RA = 00:49:17.780 (12.324083) DEC = -81:29:45.83 (-81.496064)
Discovery date: 2023-11-30 02:27:00.000 (JD=2460278.6020833)
Remarks: [I have determined that AT 2023yph is a star #4631003097698452224 from the Gaia DR3.] I observed the field of GRB 231129C (Fermi GBM Team, GCN Circ. 35217) near the MAXI (GCN Circ. 35223) sky region using remote telescope T72 (0.51-m f/6.8 Corrected Dall-Kirkham + CCD) of iTelescope.Net in Deep Sky Chile at Rio Hurtado Valley, Chile. 9 images (with exposures 300 seconds, BINx1) were obtained with Ic filter with midtime 02:27 UT. I detected an uncataloged source with position 00 49 17.780 -81 29 45.83 and measured its brightness near +18 mag. Magnitude was not corrected for Galactic extinction. I am guessing this is an optical afterglow of GRB 231129C.
Photometry
Discovery (first detection):
Discovery date: 2023-11-30 02:27:00.000
Flux: 18 VegaMag
Filter: I-Cousins
Instrument: Other
Telescope: Other
Last non-detection:
Archival info: DSS
Details of the new object can be viewed here: https://www.wis-tns.org/object/2023yph
Date Received (UTC): 2023-11-30 04:52:46
Date made public:
Sender: Filipp Romanov
Reporting Group: None Discovery Data Source: None
Filipp Romanov report/s the discovery of a new astronomical transient.
IAU Designation: AT 2023yph
Coordinates (J2000): RA = 00:49:17.780 (12.324083) DEC = -81:29:45.83 (-81.496064)
Discovery date: 2023-11-30 02:27:00.000 (JD=2460278.6020833)
Remarks: [I have determined that AT 2023yph is a star #4631003097698452224 from the Gaia DR3.] I observed the field of GRB 231129C (Fermi GBM Team, GCN Circ. 35217) near the MAXI (GCN Circ. 35223) sky region using remote telescope T72 (0.51-m f/6.8 Corrected Dall-Kirkham + CCD) of iTelescope.Net in Deep Sky Chile at Rio Hurtado Valley, Chile. 9 images (with exposures 300 seconds, BINx1) were obtained with Ic filter with midtime 02:27 UT. I detected an uncataloged source with position 00 49 17.780 -81 29 45.83 and measured its brightness near +18 mag. Magnitude was not corrected for Galactic extinction. I am guessing this is an optical afterglow of GRB 231129C.
Photometry
Discovery (first detection):
Discovery date: 2023-11-30 02:27:00.000
Flux: 18 VegaMag
Filter: I-Cousins
Instrument: Other
Telescope: Other
Last non-detection:
Archival info: DSS
Details of the new object can be viewed here: https://www.wis-tns.org/object/2023yph