GRB 200829A: Swift/UVOT-XRT photometric redshift
Abstract
We have performed a joint spectral analysis of Swift UVOT and XRT observations of GRB 200829A (Siegel et al., GCN Circ. 28307; Kuin et al. GCN Circ. 28311, Goad et al., GCN Circ. 28313), based on the methodology of Schady et al. (2010, MNRAS, 401, 2773). Using this method, we created an SED at 900s after the BAT trigger consisting of 6 UVOT filters and WT mode XRT data. The model with the best fit, broken power-law with a Milky Way extinction curve for the host extinction, gives a photometric redshift for GRB 200829A of 1.25 +- 0.02 (1 sigma uncertainty; chi^2/dof = 586/538). This circular is an official product of the Swift team.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- September 2020
- Bibcode:
- 2020GCN.28338....1O