{
  "bibcode": "2019GCN.25669....1G",
  "body": "AUTHORS: A. Grado (INAF-Napoli), E. Cappellaro (INAF-Padova), E. Brocato\n(INAF-Abruzzo),\nS. Covino (INAF-Brera), F. Getman (INAF-Napoli), G. Greco (University\nUrbino) , P. D'avanzo\n(INAF-Brera), A. Rossi (INAF-OAS), E. Palazzi (INAF-OAS), S. Yang\n(INAF-Padova) on behalf of GRAWITA.\n\nWe observed the field of S190814bv (GCN 25324 and updated GCN 25333) in r'\nband with the VLT Survey\nTelescope (VST) equipped with Omegacam (1 sqdeg FOV) (Proposal ID ESO\n0103.D-0070 ).\nThe field was observed for a total of 5 epochs distributed as reported in\nthe following table.\n\nepoch 1 2019-08-15 from 08:50:26.860 to 10:13:47.602\nepoch 2 2019-08-16 from 05:29:37.904 to  07:20:36.231\nepoch 3 2019-08-19 from 04:55:59.697 to 06:08:28.809\nepoch 3 2019-09-20 from 03:45:54.370 to 04:39:27.598\nepoch 4 2019-8-22 from 03:01:00.585 to 05:41:44.089\nepoch 5 2019-08-29 from 09:07:41.251 to 09:36:29.055\nepoch 5 2019-08-30 from 07:49:42.449 to 09:34:10.334\nall time are in UTC.\n\nIn the first night we imaged 18 sqdeg covering 65% of the localization\nprobability region.\nStarting from the second epoch we modified the pointings to improve the\nupdated skymap coverage.\nThe area imaged is 23 sqdeg covering 87% of the localization region.\nEach 1 sqdeg pointing was observed three times for a total exposure time of\n135 seconds.\n\nImages were analized using the our photometric pipelines (Brocato et al.\n2018 MNRAS, 474,1).\nThe final vetting was done via visual inspection. The candidates were\nmatched against the Minor\nPlanet Center to further filter against slow moving asteroids. The three\nmost outstanding candidates,\nalready reported in TNS, and visible in at least three epochs are:\n\nName       | TNS Name |    RA | Dec   | Night | Mag   | MAGERR\n\nVST J004656.70-252236.7 | AT2019npd   | 00:46:56.711 |  -25:22:36.43    |\n2019-08-21 | 19.874 +/- 0.062\nVST J004847.88-251823.5 | AT2019noq   | 00:48:47.882 |  -25:18:23.46    |\n2019-08-15 | 19.962 +/- 0.033\nVST J005605.55-243826.4 | AT2019nve   | 00:56:05.510  | -24:38:26.40    |\n2019-08-14 | 20.531 +/- 0.083\nVST J004659.45-230559.5 | AT2019nyv   | 00:46:59.451  | -23:05:59.50    |\n2019-8-15   | 21.200 +/- 0.087\n\nwhere the magnitude and night refers to the peak value.\n\nAutomatic VST data processing was done with the VSTTube pipeline (Grado et\nal. 2012 Mem.SAIt 19, 362).\nThe pointing sequence was generated using the GWsky script (\nhttps://github.com/ggreco77/GWsky).\nWe acknowledge excellent support from the ESO User Support Department and\nfrom ESO observing staff\nin Paranal.",
  "circularId": 25669,
  "createdOn": 1567711891000,
  "email": "aniello.grado@gmail.com",
  "subject": "LIGO/Virgo S190814bv: GRAWITA VST-ESO PARANAL observations and independent transient candidates discovery.",
  "submitter": "Aniello Grado at INAF-OAC  <aniello.grado@gmail.com>",
  "eventId": "LIGO/Virgo S190814bv"
}