TITLE:   GCN CIRCULAR
NUMBER:  43879
SUBJECT: EP260227a: LCOGT Optical Observations
DATE:    26/02/28 17:33:05 GMT
FROM:    Robert Strausbaugh at Eastern Illinois University <rstrausbaugh@eiu.edu>

R. Strausbaugh (Eastern Illinois University), A. Cucchiara (NASA) report on behalf of a larger collaboration:

We observed the EP260227a field (Wang et al., GCN 43869)  with the LCOGT 1-meter Sinistro instrument at the Cerro Tololo Interamerican Observatory, Chile site, on February 28, from 05:39 to 06:00 UT (corresponding to 9.28 to 9.63 hours after the trigger time) with the SDSS r and i filters.

We performed a series of 3x200s exposures in i-band and r-band.  We marginally detect an uncatalogued sources in both bands, consistent with other optical detections (Eyles-Ferris et al., GCN 43867; Li et al., GCN 43868; Fu et al., GCN 43873; Mandarakas et al., GCN 43874; Eyles-Ferris et al., GCN 43875; Malesani et al., GCN 43876).

The following magnitudes are calculated using the PanSTARRS catalog as reference:

r = 20.78 +/- 0.58
i = 21.47 +/- 0.52

These magnitudes are not corrected for galactic extinction.