[vsnet-grb-info 23298] LIGO/Virgo S190814bv: No candidates from image subtraction in DCT galaxy targeted search

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  25397
SUBJECT: LIGO/Virgo S190814bv: No candidates from image subtraction in DCT galaxy targeted search
DATE:    19/08/19 02:01:19 GMT
FROM:    Simone Dichiara at UMCP/NASA/GSFC  <dichiara at umd.edu>

S.Dichiara (UMD, NASA-GSFC), E. Troja (UMD, NASA-GSFC), S.B. Cenko
(NASA-GSFC), P. Gatkine (UMD), A. Kutyrev (UMD, NASA-GSFC), J.M. Durbak
(UMD), S. Veilleux (UMD), Gabriele Minervini (INAF-IAPS), Roberto Ricci
(IRA Bologna) report on behalf of a larger collaboration:

We reobserved the fields listed in GCN  25374 using the Large Monolithic
Imager (LMI) on the 4.3m Discovery Channel Telescope (DCT) at Happy Jack,
AZ. Observations started on August 18, 10:09:02 UTC (about 3.54 days after
the detection) with SDSS i filter.

We do not find any obvious transient source down to i~21 AB mag for objects
within the galaxy, and i~22 AB mag for field objects.

We also observed the DECam-GROWTH candidates DG19qabkc and DG19wgmjc
(Andreoni et al., GCN Circ. 25362; Goldstein et al., GCN Circ. 25391) in i
and z band.

Both objects are detected with i~21 AB mag, although photometric
measurements are contaminated by host galaxy light.

We thank the staff of the Discovery Channel Telescope in particular Ana
Hayslip for assistance with these observations.