BVRI photometry of the GRB 220019A afterglow
ATel #15668; William Keel (Univ. of Alabama), Marcos Santander (Univ. of Alabama), Priya Gokul Dass (Florida Inst. of Technology)
on 12 Oct 2022; 13:24 UT
Credential Certification: William Keel (wkeel@ua.edu)
Subjects: Optical, Gamma-Ray Burst
We used the 1m Jacobus Kapteyn Telescope (JKT) at La Palma, remotely operated by the SARA consortium, to obtain BVRI photometry of the afterglow of GRB 221009A (Swift J1913.1+1946; ATel #15650) on October 10 UT. In image series from Oct. 10.83-10.88, 30 hours after the initial burst detection, we find B=22.3, V=19.6, R=18.5, I=17.6. Zero points used the Landolt standard stars in the field of PG 1633+099. The object is detected in B at roughly the 3-sigma level. A coordinate solution using the astrometry.net web service gives (J2000) coordinates 19:13:03.503 +19:46:24.1, consistent with the Swift UVOT position.
