Gaspare Lo Curto

Publications (1)0 Total impact

• Source

  Available from: Vincenzo Testa

  Article: Discovery and Monitoring of the likely IR Counterpart of SGR 1806-20 during the 2004 gamma-ray burst-active state

  GianLuca Israel, Stefano Covino, Roberto Mignani, Luigi Stella, Gianni Marconi, Vincenzo Testa, Sandro Mereghetti, Sergio Campana, Nanda Rea, Diego Gotz, Rosalba Perna, Gaspare Lo Curto
  [show abstract] [hide abstract]
  ABSTRACT: The sky region including the Chandra position of SGR 1806-20 was monitored in the IR band during 2004, following its increased high energy bursting activity. Observations were performed using NAOS-CONICA, the adaptive optics IR camera mounted on Yepun VLT, which provided images of unprecedented quality (FWHM better than 0.1"). After the 2004 December 27th giant flare, the source position has been nailed by VLA observations of its radio counterpart, reducing the positional uncertainty to 0.04". Using IR data from our monitoring campaign, we discovered the likely IR counterpart to SGR 1806-20 based on positional coincidence with the Chandra and VLA uncertainty regions and flux variability of a factor of about 2 correlated with that at higher energies. We compare our findings with other isolated neutron star classes thought to be related, at some level, with SGRs. Comment: 4 pages, 2 figures. Accepted for publication on A&A Letters
  06/2005;