S. Leonini, M. Conti, P. Rosi, L.M. Tinjaca Ramirez (Montarrenti Observatory, Siena, Italy), G. Bonnoli (INAF-OAB) report:
We observed the field of the fast red optical transient ZTF23aaoohpy/AT2023lcr (Swain et al., GCN 34022; Gompertz et al., GCN 34023; Kumar et al., GCN 34025; Adami et al., GCN 34030; Perley et al., GCN 34031; Jiang et al., GCN 34040; Perley et al., GCN 34041; Fulton et al., 34042; Chen et al., GCN 34043, Belkin et al., GCN 34047; A. A. Breeveld, GCN 34049) with the automatic 0.53m Ritchey-Chretien telescope + U47 detector at Montarrenti Observatory (Siena, Italy, IAU code C88).
The observations were started under mediocre weather conditions at 2023-06-19 21:54:09 UT (approximately 5 hours after notice) stacking a sets of R and I-band CCD images.
The OT was detected at the following position:
RA (J2000.0) 16h 31m 37.42s +/-0.17
Decl. (J2000.0) +26° 21' 58.00" +/-0.16
Preliminary photometry is obtained using nearby PanSTARRS stars as follows:
MJD Filter Mag. Err.
60114.91576 R 20.53 +/-0.20
60114.91631 I 20.02 +/-0.19
Measures are not corrected for galactic dust extinction.
Montarrenti Observatory (IAU code C88) is a public observatory located close to the homonym medieval castle near Siena - Italy managed by the local amateur astronomer association (Unione Astrofili Senesi). The main instrument is an automated and remoted Ritchey-Chretien telescope D=0.53m - f/8.7 equipped with U47 back-illuminated camera. The observatory is devoted to supernovae search, GRB afterglow detection and photometric follow-up of blazars