GRB 230812B: Bassano Bresciano Observatory optical observations
Abstract
We imaged the field of GRB 230812B (Lesage et al., GCN 34387; Scotton et al., GCN 34392; Page, GCN 34394; Zheng & Filippenko, GCN 34395; Lipunov et al., GCN 34396; Salgundi et al., GCN 34397; Ackley et al., GCN 34398; Xiong et al., GCN 34401; Casentini et al., GCN 34002; Frederiks et al., GCN 34403; Mao et al., GCN 34404; Odeh et al., GCN 34405; Moskvitin et al., GCN 34406) detected by FERMI(trigger 713559497.049606 / 230812790) with the robotic telescope of (IAU station 565) Bassano Bresciano Observatory, Italy. Member of: AAVSO - American Association of Variable Star Observers. UAI/SSV - Unione Astrofili Italiani/sezione stelle variabili-GRB. GAC - Gruppo Astrofili Cremonesi. The observations started 24.57 hour after the FERMI trigger, At the end of twilight with our Newton telescope D=250 mm F/D=4.8 Weather conditions were good. We co-added 2 series of 70 exposures of 60 sec each. Start T0+ End T0+ 24.57 hour 27.09 hour We detected a (fading) afterglow in the error box of the XRTcandidate. at the following position (+/- 2 arcsec): RA (J2000.0) = 16h 36m 31.51s DEC(J2000.0) = +47d 51p 32.2s The results of our photometry are: ----------------------------------- JD Mag Err Flt ----------------------------------- 2460170.36459 19.9 +/- 0.2 CR 2460170.38708 20.1 +/- 0.2 CR CR is unfiltered with R zero point. Magnitudes were estimated with the PanSTARRS cat. and are not corrected for galactic dust extinction. Reference: http://www.osservatoriobassano.org/GRB.asp The message may be cited.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- August 2023
- Bibcode:
- 2023GCN.34417....1Q