TITLE: GCN CIRCULAR NUMBER: 21116 SUBJECT: LIGO/Virgo G284239: DLT40 follow-up observation DATE: 17/05/19 21:22:39 GMT FROM: Sheng Yang at UC Davis 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 58 galaxies within the LVC error region for the GW trigger G284239 using the GW LIB localization map.We selected 85 galaxies from the GWGC catalogue within 95.0% of the trigger error region, within a distance of 40.0 Mpc, brighter that -17.5 mag and at a Declination < 20 degree. 58 of those galaxies have been observed using the Prompt 5 telescope and are part of the ongoing DLT40 search. They represent the 3.3% of all galaxies within 40.0 Mpc in the Glade catalogue within the LVC error region for the GW trigger and contains 13.3% of all B band luminosity of those galaxies. We started to observe these sample of galaxies on 2017-5-2 and monitored them for 2 weeks after the GW trigger. No interesting transients have been identified down to a limit magnitude of 19. Below follow the list of galaxies observed: Name RA(J2000) DEC(J2000) Dist(Mpc) BMAG KMAG NGC6384 263.1007 7.0603 25.94 -21.26 -24.5418 IC4837A 288.8173 -54.1325 33.42 -21.15 -24.474 NGC6788 291.7071 -54.9513 34.56 -21.09 -24.1729 NGC6181 248.0877 19.8259 33.57 -20.73 -23.9578 IC4837 288.808 -54.6659 33.42 -20.72 -20.383 NGC6368 261.7978 11.5436 30.48 -20.62 -23.2311 NGC7049 319.7449 -48.5632 29.92 -20.61 -25.1338 NGC6887 304.3219 -52.7968 30.06 -20.49 -23.5189 NGC6868 302.4754 -48.3796 26.79 -20.45 -24.8229 NGC6810 295.8931 -58.6557 23.12 -20.42 -24.1399 IC4889 296.3133 -54.3442 29.24 -20.33 -24.2199 NGC6861 301.8312 -48.3703 28.05 -20.29 -24.5317 NGC7029 317.967 -49.2838 38.37 -20.23 -24.38 IC4797 284.1237 -54.3059 28.05 -20.23 -24.1707 NGC6851 300.8932 -48.2845 36.14 -20.13 -24.0209 IC4946 305.992 -43.9953 34.67 -20.12 -23.9688 ESO183-030 284.2327 -54.5457 33.42 -20.11 -24.292 NGC7041 319.1349 -48.3636 25.7 -20.06 -23.8377 NGC6909 306.9121 -47.027 35.48 -20.04 -23.5259 IC4839 288.8919 -54.6266 35.11 -20.02 -23.4762 NGC6870 302.5452 -48.2871 33.42 -19.9 -23.673 NGC6509 269.8555 6.287 27.67 -19.81 -22.476 NGC7007 316.3662 -52.5519 34.67 -19.75 -23.7408 ESO231-017 286.1934 -47.8487 35.14 -19.62 -23.204 IC4901 298.5957 -58.7139 17.86 -19.61 -22.4144 NGC6890 304.5756 -44.8071 31.19 -19.52 -23.4431 NGC6875A 302.9827 -46.1441 29.11 -19.52 -22.3472 NGC6889 304.7221 -53.957 30.22 -19.49 -22.0095 IC1151 239.6347 17.4415 24.21 -19.38 -21.508 ESO234-049 308.8254 -49.8655 31.19 -19.33 -21.8731 UGC11093 270.4656 6.9683 21.18 -19.23 -22.2496 UGC10862 262.0374 7.4226 25.35 -19.22 -20.3179 ESO286-063 317.4682 -45.5276 31.81 -19.21 -21.9048 ESO186-062 308.5086 -52.9812 31.19 -19.1 -22.2241 IC4986 304.2982 -55.0364 23.75 -19.08 -19.9153 UGC11030 268.6407 2.8794 27.67 -19.06 -19.63 ESO340-032 306.7336 -39.6159 33.54 -18.98 -21.1668 IC4821 287.3833 -55.0173 25.0 -18.98 -21.6087 IC4817 286.5516 -56.1594 33.42 -18.96 -21.27 NGC6861D 302.0812 -48.2114 33.42 -18.9 -23.421 NGC6707 283.8415 -53.8186 33.42 -18.9 -22.969 ESO340-010 304.3582 -41.1334 39.26 -18.82 -22.1218 IC4871 293.9259 -57.5191 22.59 -18.8 -20.8786 ESO285-048 311.1676 -45.9786 28.18 -18.77 -21.3327 ESO185-027 299.0568 -56.9106 23.81 -18.73 -21.9358 NGC6902B 305.7795 -43.8686 34.67 -18.69 -20.7538 ESO236-006 320.2867 -47.5151 28.93 -18.66 -19.5207 NGC6149 246.8508 19.5972 30.57 -18.65 -22.1455 NGC6990 314.9871 -55.562 25.36 -18.57 -21.0847 ESO233-035 302.3566 -48.2848 33.97 -18.57 -22.2335 NGC7090 324.1204 -54.5576 6.28 -18.56 -20.8258 NGC6861E 302.7564 -48.6908 33.9 -18.55 -21.044 ESO235-085 319.5675 -48.5375 24.03 -18.53 -21.6278 NGC7022 317.3967 -49.3037 29.49 -18.51 -22.1184 ESO235-001 312.2578 -47.2987 33.75 -18.51 -20.2164 PGC061359 271.0942 7.2804 28.11 -18.5 -23.0103 IC4885 295.9668 -60.6517 29.92 -18.39 -21.3538 IC4888 296.2176 -54.4567 29.82 -18.29 -21.2615