GRB 231117A: AKO Follow-Up Observation
Abstract
As a follow-up to our first observation of GRB 231117A, performed on Nov. 17, 2023 (GCN 35084 <https://gcn.nasa.gov/circulars/35084>), we again observed the field with our 0.36m f/7.7 robotic telescope, on Nov. 18, starting at 15:50 UT using an (Ic) filter. We again detected a faint object at the same location of the source SDSS J220933.34+133119.5 (PS1 ID = 124223323889577032), which is listed in the Pan-STARRS catalogue with imag = 21.5, and in the SDSS catalogue with imag = 20.9. The coordinates of the detected object are: R.A. (2000) = 22:09:33.36, Dec. (2000) = +13:31:20.1, which is consistent with the coordinates of the candidate optical source reported by Yang et al. (GCN 35083 <https://gcn.nasa.gov/circulars/35083>). The following table summarizes the results of both nights using the Atlas catalogue as a reference: --------------------------------------------------------------------------- ObsTime (mid), T(Mid)-T(0), Exposure, Filter, Mag, RMS, Limiting Magnitude --------------------------------------------------------------------------- 2023-11-17 15:37:30Z, 12.6 h, 33x180s (stacked), Ic, 19.85, 0.20, 20.2 2023-11-18 15:50:06Z, 1.53 d, 40x180s (stacked), Ic, 19.78, 0.21, 20.4 --------------------------------------------------------------------------- The magnitudes are not corrected for galactic extinction.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- November 2023
- Bibcode:
- 2023GCN.35118....1O