Fast offline analysis GRB240811A August 2024 P067
Contents
General information
- Name of the source: GRB240811A
- Brief description of the source:
- Object type : GRB
- Redshift (z) : ?
- Other relevant information
- RA, Dec in deg (ICRS): 226.3622, 28.8957
- Analysis by:
- Ryuji Takeishi (ICRR - take@icrr.u-tokyo.ac.jp)
Data-taking information
- Dates of data-taking: 2024-08-11
- ZD range (deg): --> 30-50 deg
- AZ range (deg): -->
- Transmission9km:
- Observation condition: moon
- Observation mode: std wobbles
- Observations:
'2024-08-11': [18574, 18575, 18576, 18577, 18578] 1.84 h
- Data quality selection: Almost runs did not survive the default dR/dI@442pe limit of 1.5. Likely due to high dust concentration. Since almost runs exceed dark NSB limit, we did both analyses with dark NSB MC and high NSB image cleaning MC.
- Joint observations with MAGIC? : yes
- Information on data-taking (observations summaries): https://www.lst1.iac.es/datacheck/observation_overview/2024/08/run_summary_2024_08_11.pdf
General analysis information
- source-independent analysis
- lstchain version: v0.10.11
- DL1b standard production (v0.10/tailcut84), run-wise merged files in:
/fefs/aswg/data/real/DL1/20240811/v0.10/tailcut84/dl1_LST-1.Run18574.h5 /fefs/aswg/data/real/DL1/20240811/v0.10/tailcut84/dl1_LST-1.Run18575.h5 /fefs/aswg/data/real/DL1/20240811/v0.10/tailcut84/dl1_LST-1.Run18576.h5 /fefs/aswg/data/real/DL1/20240811/v0.10/tailcut84/dl1_LST-1.Run18577.h5 /fefs/aswg/data/real/DL1/20240811/v0.10/tailcut84/dl1_LST-1.Run18578.h5
Monte Carlo information
Write below the MC production id among the existing MC
- All-sky MC production used: 20240131_allsky_v0.10.5_all_dec_base
- Declination line (training): dec_3476
High-NSB analysis:
- All-sky MC production used: 20240229_dec34_nsb14
- Declination line (training): dec_3476
Random forest
Path to the models used:
/fefs/aswg/data/models/AllSky/20240131_allsky_v0.10.5_all_dec_base/dec_3476
High-NSB analysis:
/fefs/aswg/data/models/AllSky/20240229_dec34_nsb14/dec_3476
DL2 data
Config file (standard):
/fefs/aswg/data/models/AllSky/20240131_allsky_v0.10.5_all_dec_base/dec_3476/lstchain_config_2024-01-31.json
Config file (high-nsb):
/fefs/aswg/data/models/AllSky/20240229_dec34_nsb14/dec_3476/llstchain_config_2024-02-29.json
Files in:
/fefs/aswg/workspace/ryuji.takeishi/FOA/GRB240811A/DL2 /fefs/aswg/workspace/ryuji.takeishi/FOA/GRB240811A/NSB14/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
Files in:
/fefs/aswg/workspace/ryuji.takeishi/FOA/GRB240811A/DL3 /fefs/aswg/workspace/ryuji.takeishi/FOA/GRB240811A/NSB14/DL3
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
Dark NSB image cleaning: No detection
High NSB image cleaning: No detection
