{
  "bibcode": "2017GCN.21736....1L",
  "body": "V.M.Lipunov, E. Gorbovskoy, V.G.Kornilov, N.Tyurina, V.Shumkov, D.Kuvshinov, \nP.Balanutsa,  O.Gress, A.Kuznetsov, M.I.Panchenko, A.V.Krylov, I.Gorbunov\nLomonosov Moscow State University, Sternberg Astronomical Institute\n\nR. Rebolo, M. Serra-Ricart, G. Israelian, N.Lodiu\nThe Instituto de Astrofisica de Canarias\n\nV.Yurkov, Yu.Sergienko, A.Gabovich\nBlagoveschensk Educational State University, Blagoveschensk\n\nN.M. Budnev, O. Gress, K. Ivanov, S.Yazev\nIrkutsk State University\n\nA. Tlatov, V.Sennik\nKislovodsk Solar Station of the Pulkovo Observatory\n\nR.Podesta, C.Lopez, F.Podesta\nObservatorio Astronomico Felix Aguilar (OAFA) , National University of San\nJuan, Argentina\n\nH.Levato, C.Saffe\nInstituto de Ciencias Astronomicas,de la Tierra y del Espacio (ICATE),\nSan Juan, Argentina\n\nD.Buckley, S.Potter, M.Kotze,\nSouth African Astronomical Observatory\n\n\nMASTER OT J033744.97+723159.0 (lipunov, Gorbovskoy, Kornilov et al., GCN LVC \nGCN 21719, 21780) is cheked recently by MASTER-IAC (Tenerife, Spain). Our \nphotometrical results are:\n\nDate        Time             JD         Filter    Mag      A*      Mag_cor\n\n2017-08-27 22:46:16   2457993.4487963     B      18.12    1.41      16.71\n2017-08-27 22:50:10   2457993.4515046     V      16.81    1.07      15.74\n2017-08-27 22:50:10   2457993.4515046     R      16.04    0.80      15.24\n2017-08-27 22:46:16   2457993.4487963     I      15.94    0.51      15.43\n\n* for E(B-V) = 0.3436 and Av = 3.1 * E(B-V)  = 1.065\n\n\n\n===========================\nUncorrected magnitude:\n\nB =  18.1226\nV = 16.8078\nR =  16.0422\nI  =  15.9435\n\n\nE(B-V) = 0.3436   (http://irsa.ipac.caltech.edu/applications/DUST/ )\n\nAv = 3.1 * E(B-V)  => Av = 1.06516 \n(http://www.astro.ncu.edu.tw/~wchen/Courses/ISM/11.Extinction.pdf page 17)\n\n=> http://www.astro.ncu.edu.tw/~wchen/Courses/ISM/11.Extinction.pdf (page 22 )\n\nSo, MASTER OT J033744.97+723159.0 is reddening (cf,  Im et al, LVC GCN 21723).\n\nThe spectroscopic observations are requared.\n\nThis message can be citted.",
  "circularId": 21736,
  "createdOn": 1503948157000,
  "email": "lipunov2007@gmail.com",
  "subject": "LIGO/Virgo G299232/PGWB170825.55: MASTER OT J033744.97+723159.0 inside 25m isophota of the NGC1343 galaxy is reddening",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov2007@gmail.com>",
  "eventId": "LIGO/Virgo G299232"
}