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The most complete catalog of optical Gamma-ray Bursts with measured redshift

Presentation #115.02 in the session Gamma Ray Bursts and Relativistic Astrophysics.

Published onJul 01, 2023
The most complete catalog of optical Gamma-ray Bursts with measured redshift

We present a compilation of 529 light curves (LCs) of all Gamma Ray Bursts (GRBs), all with measured redshifts, detected by the optical satellites and all the ground-based telescopes such as Swift UVOT, RATIR, Mitsume, the Subaru and Kiso Telescopes, TAROT, GROND, and many more, from 1997 to 2023. This is the largest repository of GRB optical LCs gathered to date. We created a user-friendly interface through a web-based tool to house the repository where the GCN information can be retrieved, along with the position, LCs, filter information, and the possibility to visualize the fitting with eight fitting models: (1) Simple power law (PL), (2) Broken power law (BPL), (3) PL+ BPL, (4) PL+ BPL+PL, (5) Willingale function (W07, Willingale et al. 2007), (6) W07 + PL, (7) W07 + BPL, and (8) W07 + BPL + PL. The fitting can be performed with a simple χ2 or with Monte Carlo Markov Chain simulations to retrieve the best-fit parameters. The GCN crawler can be used to accumulate any future data as it is able to directly collect the tables from the data in the magnitude units. Given the different formats and repositories for the optical catalog, this web-based archive is the first step/attempt towards several unifying efforts by the community to gather the largest number of optical LCs together. This effort will ease the community to perform analysis on population studies and allow us to have better coverage of the data since they are gathered from different ground-based locations. As a result, this would allow us to possibly fill in the orbital gap from Swift in crucial points of the LCs, such as at the end of the plateau emission or where a jet break can be identified.

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