GRB220930A

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Alert Information

• Name/type of the alert:
• GCN notice: [1]
• Triggered by: Swift BAT
• Alert coordinates:
  • RA: 4 h 18 m 56.952 s, Dec: +13 deg 21 m 6.120 s
  • RA, Dec in deg (ICRS): 64.73730 deg, 13.35170 deg
• Alert arrival time: 11:12:18 UTC
• Other relevant information:
  • Redshift (z):

LST Observations

• Dates of data-taking: 2022-09-30
  • 2022-09-30
    • Zenith range (deg): 52.6 -> 20.4
    • Transmission9km:
    • Observation condition: dark
    • Observation mode: std wobble
    • Runs: 9443 - 9450
    • Joint observations with MAGIC? : Yes
    • ELOG link: [2]
    • Important comments:

Analysis by Kenta (Kyoto)

• Email address of analyser: terauchi.kenta.74s@st.kyoto-u.ac.jp

Data info

• Overall selected observation time: 134.6 min (2.24 h)
• Selected runs: 9443 - 9450
• Position analyzed: RA 64.71717 deg, Dec +13.34902 deg

DL1 data

Used DL1b files produced by LSTOSA (lstchain v0.9.6)

/fefs/aswg/data/real/DL1/20220930/v0.9/tailcut84/

DL2 data

• Random forest:

/fefs/aswg/data/models/AllSky/20220511_allsky_std/dec_931

• lstchain v0.9.6 with config file taken from the All Sky model

/fefs/aswg/data/models/AllSky/20220511_allsky_std/dec_931/lstchain_84.json

Theta2 plot from DL2

• Cuts and parameters used:
  • intensity > 50
  • gammaness > 0.6
  • leakage < 0.2

Theta2 plot for GRB220930A.

Significance evolution plot for GRB220930A.