[vsnet-grb-info 9134] GRB 100418A: host galaxy detection in the SDSS
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Mon Apr 19 19:32:42 JST 2010
TITLE: GCN CIRCULAR
NUMBER: 10621
SUBJECT: GRB 100418A: host galaxy detection in the SDSS
DATE: 10/04/19 10:32:36 GMT
FROM: Daniele Malesani at Dark Cosmology Centre, Niels Bohr Inst <malesani at dark-cosmology.dk>
Daniele Malesani (DARK/NBI) reports:
At the position of the optical afterglow of GRB 100418A (Marshall et
al., GCN 10612; Filgas et al., GCN 10617), a faint, compact object is
well visible in the SDSS frames and catalogs ( Abazajian et al. 2009,
ApJS, 182, 543), in the g, r, and i bands.
The (AB) model magnitudes as reported in the SDSS catalog are:
u: not detected
g = 22.89 +- 0.17
r = 22.41 +- 0.16
i = 21.94 +- 0.17
z: not detected
See e.g.
http://cas.sdss.org/astrodr7/en/tools/explore/obj.asp?id=758879770841908118
The host detection is consistent with the relatively low redshift and
the report of nebular emission lines superimposed on the bright
afterglow continuum (Antonelli et al., GCN 10620). A SN as bright as
SN1998bw would peak at r ~ 24 at the position of GRB 100418A.
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