GRB 190829A: TNG imaging of the NIR afterglow
Abstract
We observed the afterglow of GRB 190829A (Dichiara et al., GCN 25552; Lesage et al., GCN 25575; Xu et al., GCN 25555) with the 3.6m Italian TNG telescope (Canary Islands, Spain), equipped with the NICS infrared camera in imaging mode. We obtained a series of images with the J, H and Ks filters on 2019 Aug 31 from 03:45 to 05:52 UT (i.e. from about 31.8 hours to about 34 hours after the GRB). From preliminary aperture photometry, the NIR afterglow is clearly detected with the following magnitudes: J = 18.8 +/- 0.2 H = 18.1 +/- 0.1 Ks = 17.8 +/- 0.1 (AB, calibrated against the 2MASS catalogue). We cannot exclude contamination from the host galaxy light. Compared to the magnitudes reported by Paek & Im (GCN 25584), our results are consistent with a power-law decay with index alpha ~ 1 of the NIR afterglow flux.
- Publication:
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GRB Coordinates Network
- Pub Date:
- August 2019
- Bibcode:
- 2019GCN.25591....1D