TITLE:   GCN CIRCULAR
NUMBER:  34052
SUBJECT: ZTF23aaoohpy/AT2023lcr: Montarrenti Observatory optical observations
DATE:    23/06/21 20:42:48 GMT
FROM:    Simone Leonini at Montarrenti Observatory (Siena, Italy) <s.leonini@iol.it>

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