GRB220311A

Go back to Transient observation logbook.

Alert Information

• Name/type of the alert: Name
• GCN notice:
• Triggered by: INTEGRAL
• Alert coordinates:
  • RA: (hh mm ss), Dec: (dd mm ss)
  • RA, Dec in deg (ICRS): 158.01560, +66.06780
• Alert arrival time: 2022-03-11 16:33:28 UTC (TYPE_INTEGRAL_WAKEUP)
• Other relevant information:
  • Redshift (z):

LST Observations

• Dates of data-taking: 2022-03-09
  • 2022-03-09
    • Zenith range (deg): 41 -> 55
    • Transmission9km:
    • Observation condition: moon -> dark
    • Observation mode: std wobbles
    • Runs: 7414 - 7423 (moon: 7415-7418)
    • Joint observations with MAGIC? : No
    • ELOG link: Logbook URL
    • Important comments: NSB level of Run7371,7372 should be below 2x dark NSB according to PMT anode current

Analysis by Kenta

Analysis configuration

• Analyzer: Kenta Terauchi (Kyoto Univ., 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

• DL1 files :

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

/fefs/aswg/data/real/DL1/20220311/v0.9/tailcut84/dl1_LST-1.Run0{7414-7423}.h5

• Random Forest :

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

/fefs/aswg/data/models/20200629_prod5_trans_80/zenith_40deg/south_pointing/20220304_v0.9.3_prod5_trans_80_zen40az180_local_tailcut_8_4

• DL2 MC data for IRF:

• Overall selected observation time: 132 min (2.2 h)

• Position analyzed: 158.01560, +66.06780 (deg)

• Analysis/data problems:

Theta2 plot

• theta < 0.2
• norm_range_theta2: 0.3 - 0.5

Theta2 plot for GRB220311A using all runs