GCN Circular 34573
Subject
Swift J1727.8-1613 (GRB 230824A): Montarrenti Observatory photometric observations
Date
2023-08-27T14:57:12Z (9 months ago)
From
Simone Leonini at Montarrenti Observatory (Siena, Italy) <s.leonini@iol.it>
Via
Web form
S. Leonini, M. Conti, P. Rosi, L.M. Tinjaca Ramirez (Montarrenti Observatory, Siena, Italy) report:
We observed the field of Swift J1727.8-1613 (GRB 230824A)
(Page et al., GCN 34537; Odeh et al., GCN 34543; Dutton et al., GCN 34556; Odeh et al., GCN 34561; Quadri et al., GCN 34562; Lopresti, GCN 34566; Pavoni & Moretti, GCN 34570) with the remote controlled 0.53m Ritchey-Chretien telescope + U47 detector at Montarrenti Observatory (Siena, Italy, IAU code C88) in 2 epochs, starting on Aug 24.78994 (5 hours after trigger) and Aug. 26.79422 2023 (53 hours after trigger) with multiple exposures in V, Rc and Ic band.
The OT was detected at the following position:
RA (J2000.0) 17h 27m 43.32s +/-0.2
Dec. (J2000.0) -16° 12' 18.60" +/-0.2
Photometry was obtained using nearby PanSTARRS stars as follows:
==============================
Obs. midtime UT Filter Mag. Err.
==============================
2460181.2962325 V 13.45 0.002
2460181.3049015 V 13.48 0.002
2460181.3127082 V 13.50 0.002
2460181.3205208 V 13.50 0.002
2460181.3305952 V 13.47 0.002
2460183.3018576 V 12.54 0.003
2460183.3062470 V 12.52 0.003
2460183.3143382 V 12.48 0.004
2460183.3208796 V 12.50 0.004
-----------------------------------------------
2460181.2973320 R 13.39 0.001
2460181.3053240 R 13.42 0.001
2460181.3131307 R 13.42 0.001
2460181.3213754 R 13.44 0.001
2460181.3315657 R 13.39 0.001
2460183.2976407 R 12.43 0.002
2460183.3047650 R 12.43 0.002
2460183.3089728 R 12.41 0.002
2460183.3200694 R 12.44 0.002
-----------------------------------------------
2460181.2940451 I 13.29 0.002
2460181.3031443 I 13.28 0.002
2460181.3109548 I 13.26 0.002
2460181.3187615 I 13.22 0.002
2460181.3265489 I 13.26 0.001
2460181.3336487 I 13.26 0.001
2460183.2980439 I 12.28 0.003
2460183.3052912 I 12.26 0.003
2460183.3164382 I 12.27 0.003
2460183.3204745 I 12.26 0.003
-----------------------------------------------
Magnitudes were converted using Lupton 2005 equations and are not corrected for galactic dust extinction.
Further observations are planned.