DE LUISE, FioreFioreDE LUISETedesco, P.P.TedescoNapoleone, N.N.NapoleoneROSSI, AndreaAndreaROSSIDolci, M.M.DolciValentini, G.G.ValentiniCANTIELLO, MicheleMicheleCANTIELLODi Cianno, A.A.Di CiannoValentini, A.A.ValentiniPACINELLI, Lucio PrimoLucio PrimoPACINELLIFiaschi, M.M.FiaschiGreco, G.G.GrecoCappellaro, E.E.CappellaroD'Avanzo, P.P.D'AvanzoGRADO, ANIELLOANIELLOGRADOBROCATO, EnzoEnzoBROCATOGrawita2022-06-202022-06-202020http://hdl.handle.net/20.500.12386/32411We carried out observations of the LIGO/Virgo trigger GW S200224ca (GCN Circ. #27184) using the INAF-OAAb 0.9m Schmidt Telescope of the INAF - Astronomical Observatory of Abruzzo located at 2150 meters o.s.l. at Campo Imperatore (Italy) and equipped with a 4096x4096 CCD covering a field of view of 1.15×1.15 square degrees. Due to weather conditions, only three pointings were made covering an area of nearly 4 square degrees; a containment probability of ~ 8 % of the 50% credible region was captured. The pointing sequence was generated using the GWsky script (G. Greco, https://github.com/ggreco77/GWsky), starting from the high probability region of the bayestar skymap and taking into account the airmass and relative density of nearby galaxies at the distance of 1585 +/- 331 Mpc. The total exposure time for each image was 3x180 sec. The observations were taken with the r-Sloan band on 2020-02-24 starting at 23:47:37.0 UT, about one hour after the GW detection (i.e. 2020-02-24 22:22:34.406 UTC). The estimated limiting magnitude in r-Sloan is about 21.5 mag. Hereafter the log of the observations. | RA (J2000) | Dec (J2000) | UT time | filter | exposure time| | 11:43:50.29 | -07:49:10 | 2020-02-24T23:47:37.0 | r-sloan | 3x180 sec | | 11:35:44.35 | -07:49:10 | 2020-02-25T00:04:09.6 | r-sloan | 3x180 sec | | 11:39:47.98 | -07:49:35 | 2020-02-25T00:20:44.8 | r-sloan | 3x180 sec | The analysis of images is ongoing. -------------------------------------------- De Luise Fiore, PhD INAF - Osservatorio Astronomico d'Abruzzo Via Mentore Maggini, s.n.c. 64100 - TERAMO Tel +39-0861-439712 Fax +39-0861-439740 --------------------------------------------ELETTRONICOenMagazine articlehttps://gcn.gsfc.nasa.gov/gcn/gcn3/27211.gcn32020GCN.27211....1DFIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_6 Stars and stellar systems