LIGO/Virgo/KAGRA S240413p: No Counterparts in DDOTI/OAN Optical Observations

We observed LIGO/Virgo/KAGRA S240413p (GCN #36075) with the DDOTI/OAN wide-field imager at the Observatorio Astronomico Nacional on Sierra San Pedro Martir (http://ddoti.astroscu.unam.mx) on the night of 2024-04-13 UTC. We tiled the LVKC localization with one pointing centred on 165.541667 +11.866667 (J2000). The combined field covers about 48 square degrees and includes about 41% of the probability in the current BAYESTAR map. We observed from 2024-04-13 05:58 UTC to 2024-04-13 09:29 UTC (from T+3.6 to T+7.1 hours after the event) obtaining exposures of 2.4 hours across the field in the w filter, with 10-sigma limiting magnitudes of w = 20.2 to w = 20.9. Comparing our observations to the USNO-B1 and PanSTARRS PS1 DR2 catalogs we detect no uncatalogued sources within the observed field to our 10-sigma limit. We observe the galaxy WISEA J105644.96+105455.6 (GCN #36080) without any evidence of flare activity. Further observations are planned. We thank the staff of the Observatorio Astronomico Nacional in San Pedro Martir.