TITLE: GCN CIRCULAR NUMBER: 25460 SUBJECT: LIGO/Virgo S190814bv: Photometric Evolution of DECAM candidates DATE: 19/08/23 22:37:38 GMT FROM: Mansi M. Kasliwal at Caltech/Carnegie C. Fremling, D. Goldstein, I. Andreoni, M. M. Kasliwal (Caltech) report on behalf of the GROWTH (Global Relay of Observatories Watching Transients Happen) collaboration We ran independent, offline, forced photometry (Fremling et al. 2016) of some candidates (Goldstein et al., GCN 25393, Herner et al., GCN 25373, Soares-Santos et al., GCN 25438, Andreoni et al., GCN 25362) from the Dark Energy Camera that have a photometric redshift consistent with the GW constraint for S190814bv (GCN LVC et al., 25324, 25333). The following candidates are consistent with flat evolution within error bars of typically 0.15 mag: DG19wgmjc/AT2019npw , DG19wxnjc/AT2019npv, DG19rzhoc/AT2019num, desgw-190814q/AT2019obc. This photometry is consistent within the uncertainties with Annis et al., GCN 25458 and Smartt et al. GCN 25455. We caution that previous photometry reported by our discovery pipeline to TNS esp. on the first two nights was preliminary and affected by weather.