Fast Offline Analysis GRB240825A August 2024 P068
Contents
General information[edit]
- Name of the source:
- Brief description of the source: GRB 240825A
- Object type : GRB
- Redshift : z = 0.659
- Other relevant information
- RA, Dec in deg (ICRS): 344.56, 1.04
- RA: 22h 58m 14.4s, Dec: 1° 02' 24"
- Analysis by:
- Helena Luciani (University of Trieste - helena.luciani@phd.units.it)
Data-taking information[edit]
- Dates of data-taking: 2024-08-26
- ZD range (deg): --> 20-80 deg
- AZ range (deg): --> 100-200 deg
- Observation condition: dark
- Observation mode: std wobbles
- Effective time: 4.042 h
- Observations:
'2024-08-26': [18676, 18677, 18678, 18679, 18680, 18681, 18682, 18683, 18684, 18685, 18686, 18687, 18688, 18689]
- Data quality selection: Almost runs did not survive the default dR/dI@442pe limit of 1.5.
- 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_26.pdf
General analysis information[edit]
- source-independent analysis
- lstchain version: v0.10.11
- DL1b standard production (v0.10/tailcut84), run-wise merged files in:
/fefs/aswg/data/real/DL1/20240826/v0.10/tailcut84/dl1_LST-1.Run18676.h5 /fefs/aswg/data/real/DL1/20240826/v0.10/tailcut84/dl1_LST-1.Run18677.h5 /fefs/aswg/data/real/DL1/20240826/v0.10/tailcut84/dl1_LST-1.Run18678.h5 /fefs/aswg/data/real/DL1/20240826/v0.10/tailcut84/dl1_LST-1.Run18679.h5 /fefs/aswg/data/real/DL1/20240826/v0.10/tailcut84/dl1_LST-1.Run18680.h5 /fefs/aswg/data/real/DL1/20240826/v0.10/tailcut84/dl1_LST-1.Run18681.h5 /fefs/aswg/data/real/DL1/20240826/v0.10/tailcut84/dl1_LST-1.Run18682.h5 /fefs/aswg/data/real/DL1/20240826/v0.10/tailcut84/dl1_LST-1.Run18683.h5 /fefs/aswg/data/real/DL1/20240826/v0.10/tailcut84/dl1_LST-1.Run18684.h5 /fefs/aswg/data/real/DL1/20240826/v0.10/tailcut84/dl1_LST-1.Run18685.h5 /fefs/aswg/data/real/DL1/20240826/v0.10/tailcut84/dl1_LST-1.Run18686.h5 /fefs/aswg/data/real/DL1/20240826/v0.10/tailcut84/dl1_LST-1.Run18687.h5 /fefs/aswg/data/real/DL1/20240826/v0.10/tailcut84/dl1_LST-1.Run18688.h5 /fefs/aswg/data/real/DL1/20240826/v0.10/tailcut84/dl1_LST-1.Run18689.h5
Monte Carlo information[edit]
- All-sky MC production used: 20240131_allsky_v0.10.5_all_dec_base
- Declination line (training): dec_min_413
Random forest[edit]
Path to the models used:
/fefs/aswg/data/models/AllSky/20240131_allsky_v0.10.5_all_dec_base/dec_min_413
DL2 data[edit]
Config file:
/fefs/aswg/data/models/AllSky/20240131_allsky_v0.10.5_all_dec_base/dec_min_413/lstchain_config_2024-01-31.json
Files in:
/fefs/aswg/workspace/helena.luciani/fast_offline_analysis/GRB240825A/DL2/
DL3 data & IRF[edit]
"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,
"global_gh_cut": 0.7,
"gh_efficiency": 0.7,
"min_gh_cut": 0.1,
"max_gh_cut": 0.98,
"global_alpha_cut": 10,
"global_theta_cut": 0.2,
"theta_containment": 0.7,
"alpha_containment": 0.7,
"min_theta_cut": 0.1,
"max_theta_cut": 0.32,
"fill_theta_cut": 0.32,
"min_alpha_cut": 1,
"max_alpha_cut": 20,
"fill_alpha_cut": 20,
"allowed_tels": [1]
}
- 70 % efficiency for both gammaness and theta gamma-ray selection cuts
- Point-like IRF
Files in:
/fefs/aswg/workspace/helena.luciani/fast_offline_analysis/GRB240825A/DL3/
High-level analysis[edit]
- Gammapy 1.1
- 1D analysis (point-like IRF)
Analysis Results[edit]
Theta2 plot[edit]
Settings:
- Theta2 cut for signal extraction: 0.04 deg2
- Normalization range: 0.1 - 0.4 deg2
- Number of off positions: [1,3]
- Energy range: 10 GeV - 10 TeV
No detection
Stacked observations[edit]
Significance and Excess sky maps[edit]
LZA observations - the energy threshold is increased from 200 GeV to 500 GeV.
