GRB 220101A: NOT redshift confirmation
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning
Standard
GRB 220101A : NOT redshift confirmation. / Fynbo, J. P. U.; de Ugarte Postigo, A.; Xu, D.; Malesani, D. B.; Milvang-Jensen, B.; Viuho, J.
I: GRB Coordinates Network, Circular Service, Nr. 31359, 01.01.2022.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning
Harvard
APA
Vancouver
Author
Bibtex
}
RIS
TY - JOUR
T1 - GRB 220101A
T2 - NOT redshift confirmation
AU - Fynbo, J. P. U.
AU - de Ugarte Postigo, A.
AU - Xu, D.
AU - Malesani, D. B.
AU - Milvang-Jensen, B.
AU - Viuho, J.
PY - 2022/1/1
Y1 - 2022/1/1
N2 - We observed the optical counterpart of GRB 220101A (Tohuvavohu et al., GCN 31347; Arimoto et al., GCN 31350) using the Nordic Optical Telescope (NOT) equipped with the ALFOSC spectrograph. A spectrum with exposure time 4x1200 s (grism #20) was secured starting on 2022 Jan 1.81 UT (14.3 hr after the GRB), under good conditions, and covering the wavelength range 5600-10200 AA. A very clear trace is detected from the afterglow continuum. A deep, broad trough is detected around 6800 AA, which we interpret as due to damped Lyman alpha. A number of narrow absorption features are also clearly visible and allow to determine accurately the GRB redshift. We identify, among others, N V, S II, Si II, Si II*, O I, Ni II, C II, Si IV, C IV, Fe II, Fe II*, and Al II, all at a common redshift z = 4.618. Our results thus fully confirm the finding of Fu et al. (GCN 31353). Nice year start for GRBs: happy 2022 to all GCN readers!
AB - We observed the optical counterpart of GRB 220101A (Tohuvavohu et al., GCN 31347; Arimoto et al., GCN 31350) using the Nordic Optical Telescope (NOT) equipped with the ALFOSC spectrograph. A spectrum with exposure time 4x1200 s (grism #20) was secured starting on 2022 Jan 1.81 UT (14.3 hr after the GRB), under good conditions, and covering the wavelength range 5600-10200 AA. A very clear trace is detected from the afterglow continuum. A deep, broad trough is detected around 6800 AA, which we interpret as due to damped Lyman alpha. A number of narrow absorption features are also clearly visible and allow to determine accurately the GRB redshift. We identify, among others, N V, S II, Si II, Si II*, O I, Ni II, C II, Si IV, C IV, Fe II, Fe II*, and Al II, all at a common redshift z = 4.618. Our results thus fully confirm the finding of Fu et al. (GCN 31353). Nice year start for GRBs: happy 2022 to all GCN readers!
M3 - Journal article
JO - GRB Coordinates Network, Circular Service
JF - GRB Coordinates Network, Circular Service
IS - 31359
ER -
ID: 298379988