GCN Circular 20875

Sheng Yang (INAF-OAPd, UC Davis), Stefano Valenti(UC Davis), David Sand (TTU), Leonardo Tartaglia (TTU, UC Davis), Enrico Cappellaro(INAF-OAPd), Dan Reichart, Josh Haislip (UNC) report on behalf of the Gravitational Wave Follow-Up by DLT40.

We report the observation of 25 galaxies within the LVC error region for the GW trigger G274296 using the cWB localization map.We selected 46 galaxies from the GWGC catalogue within 80.0% of the trigger error region, within a distance of 40.0 Mpc, brighter that -17.5 mag and at a Declination < 20 degree. 25 of those galaxies have been observed using the Prompt 5 telescope and are part of the ongoing DLT40 search. They represent the 1.3% of all galaxies within 40.0 Mpc in the Glade catalogue within the LVC error region for the GW trigger and contains 6.1% of all B band luminosity of those galaxies. We started to observe these sample of galaxies on 2017-2-17 and monitored them for 3 weeks after the GW trigger. No interesting transients have been identified down to a limit magnitude of 18.5.

Below follow the list of galaxies observed:
Name RA(J2000) DEC(J2000) Dist(Mpc) BMAG KMAG
IC2367 126.042 -18.7755 29.18 -20.71 -23.8874
NGC2775 137.5837 7.0379 17.3 -20.17 -24.1532
NGC3041 148.2798 16.6777 23.77 -19.86 -23.1421
PGC023658 126.4918 -11.7792 38.93 -19.84 -21.7084
NGC2695 133.6128 -3.067 32.36 -19.76 -23.695
PGC024778 132.2517 -7.8298 38.02 -19.75 -22.3331
NGC2894 142.3758 7.7179 30.49 -19.75 -23.3068
NGC2722 134.6925 -3.71 38.02 -19.68 -22.4881
NGC3226 155.8624 19.8984 23.55 -19.59 -23.29
NGC2919 143.6982 10.2837 34.67 -19.54 -22.6498
NGC2906 143.026 8.4419 29.92 -19.28 -23.2668
NGC3020 147.5274 12.8136 21.88 -19.2 -21.0172
NGC2708 134.0337 -3.36 26.55 -19.15 -23.2403
PGC023723 126.892 -12.7566 34.61 -19.08 -21.689
UGC05467 152.0539 18.7071 39.71 -18.96 -22.1495
NGC3024 147.6141 12.7655 25.35 -18.92 -20.8419
NGC2698 133.9023 -3.1838 24.94 -18.89 -23.1405
IC0540 142.5429 7.9027 28.64 -18.75 -21.7699
NGC2690 133.1584 -2.6032 21.04 -18.61 -21.9722
NGC2697 133.7475 -2.9876 24.17 -18.59 -22.0234
NGC2612 128.4585 -13.1747 21.67 -18.59 -22.9033
UGC04684 134.1696 0.375 35.67 -18.54 -20.5195
NGC2706 134.0512 -2.5634 21.88 -18.48 -22.1752
UGC05403 150.6481 19.1769 33.42 -18.48 -22.284
UGC04845 138.1077 9.9555 30.18 -18.33 -20.6846