TITLE:   GCN CIRCULAR
NUMBER:  24729
SUBJECT: GRB 190530A: R-band observation from HCT
DATE:    19/06/03 13:53:56 GMT
FROM:    Brajesh Kumar at Indian Inst. of Astrophysics  <brajesh.kumar@iiap.res.in>

Brajesh Kumar (IIA), Avinash Singh (IIA), G. C. Anupama (IIA), D. K. 
Sahu (IIA) and S. B. Pandey (ARIES)

We observed the field of GRB 190530A (Fermi GBM team, GCN 24676, 
Biltzinger et al., GCN 24677; Lucarelli et al.,GCN 24678, Longo et al., 
GCN 24679; Verecchia et al., GCN 24683) with the 2-m Himalayan Chandra 
Telescope (HCT) located at the Indian Astronomical Observatory, Hanle, 
India. The observations started on 2019-06-02 14:50:43 UT i.e. around 
3.19 days from Fermi GBM trigger (GCN 24676).

The optical afterglow (Lipunov et al., GCN 24680; Kann et al., GCN 
24684; Heintz et al., GCN 24686; Izzo et al., GCN 24687; Xin et al., GCN 
24688; Watson et al., GCN 24690; Lipunov et al., GCN 24693; Xin et al., 
GCN 24697; Belkin et al., GCN 24698; Kann et al., GCN 24700; Siegel, GCN 
24703; Moskvitin and Uklein, GCN 24708; Vinko et al., GCN 24709; Belkin 
et al., GCN 24712) is detectable in our stacked image taken in Bessell 
R-band with a total integration time of 15 min. The preliminary 
magnitude of the OT is estimated as 21.3 +/- 0.3 mag.

These magnitudes were calibrated using the field stars from the 
USNO-B1.0 catalogue.

We thank the observing staff at IAO and CREST for helping with the 
observations.