Fast offline analysis GRB May 2024

General information

• Name of the source: GRB 240529
• Brief description of the source:
  • Object type : GRB
  • Redshift (z) :
  • Other relevant information
  • RA: (hh mm ss), Dec: (dd mm ss)
  • RA, Dec in deg (ICRS):

• Analysis by:
  • Lea Heckmann (MPP - heckmann@mpp.mpg.de)

Data-taking information

• Dates of data-taking:
  • Date (time of observation h)
    • ZD range (deg): deg
    • AZ range (deg): deg
    • Transmission9km:
    • Observations:

'2024-05-29': [17220, 17221, 17222, 17223] 0.48 h (after cuts)

• Data quality selection applied on above data sample:
• Joint observations with MAGIC? : No
• Information on data-taking (observations summaries): https://www.lst1.iac.es/datacheck/observation_overview/2024/05/run_summary_2024_05_28.pdf

General analysis information

• source-independent analysis
• lstchain version: v0.10.9
• DL1b standard production (v0.10/tailcut84), run-wise merged files in:

Monte Carlo information

Write below the MC production id among the existing MC

• All-sky MC production used: 20240426_v0.10.9_src3_dec3476_4822_tunedNSB
  • Declination line (training): dec_4822

/fefs/aswg/data/real/DL1/20240528/v0.10/tailcut84/dl1_LST-1.Run17479.h5 /fefs/aswg/data/real/DL1/20240528/v0.10/tailcut84/dl1_LST-1.Run17480.h5 /fefs/aswg/data/real/DL1/20240528/v0.10/tailcut84/dl1_LST-1.Run17481.h5 /fefs/aswg/data/real/DL1/20240528/v0.10/tailcut84/dl1_LST-1.Run17482.h5 /fefs/aswg/data/real/DL1/20240528/v0.10/tailcut84/dl1_LST-1.Run17483.h5

Random forest

Path to the models used:

/fefs/aswg/data/models/AllSky/20240426_v0.10.9_src3_dec3476_4822_tunedNSB/dec_4822

DL2 data

Config file:

/fefs/aswg/data/models/AllSky/20240426_v0.10.9_src3_dec3476_4822_tunedNSB/dec_4822/lstchain_config_2024-04-26.json

Files in:

/fefs/aswg/workspace/lea.heckmann/FOA/GRB_20240528/DL2

DL3 data & IRF

 "EventSelector": {
   "filters": {
     "intensity": [50, Infinity],
     "width": [0, Infinity],
     "length": [0, Infinity],
     "r": [0, 1],
     "wl": [0.01, 1],
     "leakage_intensity_width_2": [0, 1],
     "event_type": [32, 32]
   }
 },
 "DL3Cuts": {
   "min_event_p_en_bin": 100,
   "min_gh_cut": 0.1,
   "max_gh_cut": 0.98,
   "min_theta_cut": 0.1,
   "max_theta_cut": 0.32,
   "fill_theta_cut": 0.32,
   "allowed_tels": [1]
 },

• 70 % efficiency for both gammaness and theta gamma-ray selection cuts
• Point-like IRF

High-level analysis

• Gammapy 1.1
• 1D analysis (point-like IRF)

Analysis Results

Theta2 plot

Settings:

• Theta2 cut for signal extraction: 0.04 deg2
• Normalization range: 0.1 - 0.4 deg2
• Number of off positions: 3
• Energy range: 100 GeV - 10 TeV

Daily results

• 2024-05-28

Spectral results

• 2024-05-28

Spectral parameters: PL

Integral flux E > 100 GeV:

600 px

Light curve

• 2024-05-28

600 px