GRB220302A

Go back to Transient observation logbook.

Alert Information

• Name/type of the alert: Name
• GCN notice: https://gcn.gsfc.nasa.gov/other/1094950.swift
• Triggered by: Swift-BAT
• Alert coordinates:
  • RA: 20 05 44 (hh mm ss), Dec: +49 23 20 (dd mm ss)
  • RA, Dec in deg (ICRS): 301.432, +49.389
• Alert arrival time: 2022-03-02 07:41:17 UTC
• Other relevant information:
  • Redshift (z):

LST Observations

• Dates of data-taking:
  • Date (time of observation h)
    • Zenith range (deg):
    • Transmission9km:
    • Observation condition: dark, moonlight, twilight, mixed, calima, ...
    • Observation mode: e.g., ON, std or custom wobbles
    • Runs:
    • Joint observations with MAGIC? : Yes/No
    • ELOG link:
    • Important comments: delay, ...

Analysis by Kenta (Kyoto Univ. - terauchi.kenta.74s@st.kyoto-u.ac.jp)

Data-taking information

• Overall selected observation time:
• Selected runs:
• Position analyzed: RA, Dec

Monte Carlo information

• Link to MC files used:
  • Particle types:

DL1 data

Used DL1b files produced by LSTOSA (lstchain v0.9.X)

• original DL1b files

/fefs/aswg/data/real/DL1/20220302/v0.9/tailcut84/dl1_LST-1.Run0{7219,7220,7221}.h5

Random forest

• source-indep (diffuse gamma, src_r<3deg, disp_norm)

/fefs/aswg/data/models/20200629_prod5_trans_80/zenith_20deg/south_pointing/20220215_v0.9.1_prod5_trans_80_local_tailcut_8_4

High-level analysis

• Science Tool: gammapy 0.18.2
• Point-like IRF, 1D analysis

High Level Analysis

Analysis configuration

• Analyzer: Kenta Terauchi (email: terauchi.kenta.74s@st.kyoto-u.ac.jp)

• Software versions:
  • lstchain v0.9.2

• Cuts and parameters used:
  • intensity > 50
  • gammaness > 0.7
  • leakage < 0.2

• DL2 MC data for IRF:

• Overall selected observation time: 48 min

• Position analyzed: 301.432, +49.389 (deg)

• Analysis/data problems:

Theta2 plot

File:GRB220302A th2 Kenta Theta2 plot for GRB220302A.