Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
Introducing Einstein Probe, Astro Flavored Markdown, and Notices Schema v4.0.0. See news and announcements

GCN Circular 10621

GRB 100418A: host galaxy detection in the SDSS
2010-04-19T10:32:36Z (14 years ago)
Daniele Malesani at Dark Cosmology Centre, Niels Bohr Inst <>
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.

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.
Looking for U.S. government information and services? Visit