{
  "bibcode": "2019GCN.24208....1I",
  "body": "L. Izzo (IAA/CSIC), R. Carini (INAF-OAR),  S. Benetti (INAF-OAPd), S. Piranomonte (INAF-OAR), P. D'Avanzo, A. Melandri  (INAF-OAB), M.T. Botticella (INAF-OAC), \nV. D'Elia (ASI-SSDC), V. Testa (INAF-OAR), G. Greco (Urbino Univ.), S. Yang (INAF-OAPd), E. Brocato (INAF-OAAb, INAF-OAR), A. Harutyunyan, C. Padilla Torres (INAF-TNG) \non behalf of GRAWITA report:\n\n \nWe observed ZTF19aarzaod, one of the two most promising counterpart candidates reported by the Zwicky Transient Facility (Kasliwal et al., GCN 24191) for the GW event S190425z (GCN 24168),  \nwith the 3.6m Italian TNG telescope (Canary Islands, Spain), equipped with the DOLORES camera in spectroscopic mode starting on 2019-04-26 at 01:47:38 UT. An optical spectrum, lasting 2700 s, \nwas obtained using the grism LR-B (wavelength range ~ 400-800 nm). \nThe spectrum shows a red continuum with a broad emission consistent with being Halpha at the redshift of the host galaxy (z=0.028; Kasliwal et al., GCN 24191). Our results are consistent with the \nfindings reported by Buckley et al. (GCN 24205) and suggest that ZTF19aarzaod is not related to the GW event S190425z. \n\n\nWe thank the TNG visitor E. Knudstrup.",
  "circularId": 24208,
  "createdOn": 1556251117000,
  "email": "paolo.davanzo@brera.inaf.it",
  "subject": "LIGO/Virgo S190425z: GRAWITA TNG observations of ZTF19aarzaod",
  "submitter": "Paolo D'Avanzo at INAF-OAB  <paolo.davanzo@brera.inaf.it>",
  "eventId": "LIGO/Virgo S190425z"
}