Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to https://gcn.nasa.gov.
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 24916

Subject
GRB 190627A: VLT/FORS2 spectroscopic redshift
Date
2019-06-30T10:01:00Z (5 years ago)
From
Jure Japelj at API,U of Amsterdam <japelj.jure@gmail.com>
J. Japelj (Uni. Amsterdam), D. A. Kann (HETH/IAA-CSIC), A. de Ugarte Postigo
(HETH/IAA-CSIC, DARK/NBI), L. Izzo (HETH/IAA-CSIC), J. P. U. Fynbo (DAWN/NBI
and DAWN/DTU), D. B. Malesani (DTU Space), V. D'Elia (SSDC), N. R. Tanvir
(Univ. Leicester), S. D. Vergani (CNRS -GEPI/Observatorie de Paris), G.
Pugliese,
L. Kaper (Uni. Amsterdam) report on behalf of the Stargate collaboration:

We observed the optical counterpart (Siegel et al., GCN 24889; Pozanenko
et al., GCN 24892) of GRB 190627A (Sonbas et al., GCN 24888) with the ESO
VLT UT1 equipped with the FORS2 spectrograph. We obtained a 30 min spectrum
with the 600RI (512 - 845 nm) and a 30 min spectrum with the 600z (737-1070
nm)
grism. Observations started at 01:12:41 UT on June 30 (i.e., 2.57 days
after the
GRB detection).

In the spectrum, the continuum is clearly detected. We detect three MgII
absorption systems at redshifts z = 1.942, 1.774 and 1.681. The redshift
z = 1.942 and 1.681 absorption systems also exhibit FeII lines. We conclude
that z = 1.942 is the likely redshift of GRB 190627A.

We acknowledge the ESO observing staff at Paranal, especially Karleyne Silva
and Juan Carlos Munoz.
Looking for U.S. government information and services? Visit USA.gov