GRB220501A

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Alert Information

• Name/type of the alert: Name
• GCN notice:
• Triggered by: Swift-BAT and Fermi GBM
• Alert coordinates:
  • RA: (hh mm ss), Dec: (dd mm ss)
  • RA, Dec in deg (ICRS): 85.577, +14.033
• Alert arrival time: 2022-05-01T19:51:54 (TYPE_INTEGRAL_WAKEUP)
• Other relevant information: We observed Swift-BAT position because the position error was lower than Fermi GBM error.
  • Redshift (z):

LST Observations

• Dates of data-taking: 2022-05-01
  • 2022-05-01
    • Zenith range (deg): 65 -> 70
    • Transmission9km: n/a
    • Observation condition: twilight
    • Observation mode: std wobbles (W1 and W2)
    • Runs: 8043 - 8044
    • Joint observations with MAGIC? : No
    • ELOG link: Logbook URL
    • Important comments:

Analysis

Analysis configuration

• Analyzer: Arnau Aguasca-Cabot (Barcelona Univ., email: arnau.aguasca@fqa.ub.edu)

• Software versions:
  • lstchain v0.9.6

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

• DL1 files :

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

/fefs/aswg/data/real/DL1/20220311/v0.9/tailcut84/dl1_LST-1.Run0{8043-8044}.h5

• Random Forest :

src-indep (point gamma, disp_norm)

/fefs/aswg/

• DL2 MC data for IRF:

• Overall selected observation time: 25 min

• Position analyzed: 85.577, +14.033 (deg)

• Analysis/data problems:

Theta2 plot

• theta < 0.2