TITLE:   GCN CIRCULAR
NUMBER:  29952
SUBJECT: Lowell Discovery Telescope Observations of ZTF21aayokph (AT2021lfa)
DATE:    21/05/06 17:50:06 GMT
FROM:    Brendan O'Connor at UMD  <oconnorb@umd.edu>

B. O'Connor  (UMD, GWU), S.Dichiara (UMD, NASA-GSFC), E. Troja
(UMD, NASA-GSFC), P. Gatkine (Caltech), J.M. Durbak (UMD), S.B. Cenko
(NASA-GSFC), A. Kutyrev (UMD, NASA-GSFC), S. Veilleux (UMD) report:

We observed the field of ZTF21aayokph (AT2021lfa) reported by (Yao,
Perley, & Ho, GCN Circ. 29938) using the Large Monolithic Imager (LMI)
on the 4.3m Lowell Discovery Telescope (LDT) at Happy Jack, AZ.
Observations started on May 6, 2021 at 05:39:57 UT (about 48 hours after
the initial detection by ZTF) in the SDSS r-band.

We detect the source with magnitude r ~ 21.63 +/- 0.02 AB mag.
Compared to the magnitude determined by Butler et al. (GCN Circ.
29941) the transient faded with temporal index alpha ~ 1.5
in the r-band.

Magnitudes are calibrated against the SDSS catalog and are not
corrected for Galactic extinction.

We thank the staff of the Lowell Discovery Telescope for assistance
with these observations.