{
  "subject": "ZTF21aaeyldq: LBT near-infrared observations",
  "eventId": "ZTF21aaeyldq",
  "bibcode": "2021GCN.29327....1R",
  "createdOn": 1611063996000,
  "circularId": 29327,
  "submitter": "Andrea Rossi at INAF  <andrea.rossi@inaf.it>",
  "email": "andrea.rossi@inaf.it",
  "body": "A. Rossi, E. Palazzi (INAF-OAS) reports on behalf of the GRAWITA \ncollaboration:\n\nWe observed the field of ZTF21aaeyldq (Ho et al., GCN 29305) \nsimultaneously the J and H bands with the LUCI near-infrared imager and \nspectrograph mounted on the Large Binocular Telescope (LBT, Mt Graham, \nAZ, USA). Observations were obtained on 2021-01-17 at the UT 06:35:00 \n(midtime), i.e. ~1 day after the first ZTF detection, for a total of 15 \nmin of on-source exposure time in each band under not very good sky \nconditions (seeing=1.4\").\n\nWe detect the transient (de Ugarte-Postigo GCN#29307, Kumar et al., GCNs \n#29308; Ahumada et al., GCN #29309; Zhu et al., GCN #29310; Hu et al., \nGCN #29312, Kann et al., GCN #29321) in both J and H-band images, and we \nmeasure the following AB magnitudes:\nJ=21.62+-0.20\nH=21.36+-0.24\ncalibrated against 2MASS field stars.\n\nWe acknowledge the excellent support from the LBTO and LBT-INAF staff, \nparticularly A. Cardwell and D. Paris, in obtaining these observations."
}