A. Rossi, E. Palazzi (INAF-OAS) reports on behalf of the GRAWITA
We observed the field of ZTF21aaeyldq (Ho et al., GCN 29305)
simultaneously the J and H bands with the LUCI near-infrared imager and
spectrograph mounted on the Large Binocular Telescope (LBT, Mt Graham,
AZ, USA). Observations were obtained on 2021-01-17 at the UT 06:35:00
(midtime), i.e. ~1 day after the first ZTF detection, for a total of 15
min of on-source exposure time in each band under not very good sky
We detect the transient (de Ugarte-Postigo GCN#29307, Kumar et al., GCNs
#29308; Ahumada et al., GCN #29309; Zhu et al., GCN #29310; Hu et al.,
GCN #29312, Kann et al., GCN #29321) in both J and H-band images, and we
measure the following AB magnitudes:
calibrated against 2MASS field stars.
We acknowledge the excellent support from the LBTO and LBT-INAF staff,
particularly A. Cardwell and D. Paris, in obtaining these observations.