GCN Circular 9526
Subject
GRB 090618: SDSS host detection
Date
2009-06-18T16:52:52Z (15 years ago)
From
Daniele Malesani at Dark Cosmology Centre, Niels Bohr Inst <malesani@astro.ku.dk>
Daniele Malesani (DARK/NBI) reports:
I inspected the SDSS images of the field of GRB 090618 (Schady et al.,
GCN 9512). A faint object is visible in the r and i frames at the
position of the optical afterglow (e.g. Schady et al., GCN 9512; Cenko,
GCN 9513), likely the host galaxy of the GRB. Nothing convincing is
visible in the u, g, and z images. Compared to nearby SDSS stars, the
magnitudes are r = 22.7 +- 0.3 and i = 22.2 +- 0.4. The bright host
magnitude is consistent with the low redshift reported by Cenko et al.
(GCN 9518)
A supernova as bright as SN 1998bw (Galama et al. 1998, Nature, 395,
670) would peak at r(AB) ~ 23.6 at z=0.54.