[vsnet-grb-info 10419] GRB 110328A / Swift J164449.3+573451: KASINICS NIR Observation

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  11856
SUBJECT: GRB 110328A / Swift J164449.3+573451: KASINICS NIR Observation
DATE:    11/04/01 13:04:13 GMT
FROM:    Myungshin Im at Seoul Nat U  <mim at astro.snu.ac.kr>

   Myungshin Im, Won-Kee Park (CEOU/SNU), Hyun-Il Sung,
   Yeong-Beom Jeon (KASI), Yuji Urata (NCU), and Kuiyun Huang (ASIAA)
   on behalf of EAFON

    We continued NIR observation of GRB 110328A / Swift J164449.3+573451
  using the KASINICS on the 1.8m telescope at Mt. Bohyun Observatory
  in Korea.

    The observation started at 2011 March 31, 14:45:20 UT, and we
  obtained a series of images in H and K.

    The NIR counterpart is clearly detected in both bands,
  with the K-band magnitude at 17.29 +- 0.03.
    Comparison with the K-band magnitude of the same object from
  the previous night data (Im et al. GCN 11850) shows the dimming
  of the object by 0.43  mag over one day.
    The H-band data also show variability, confirming the variability
  of the source reported earlier (Leval et al. GCN 11854)

    More NIR imaging is planned.