Difference between revisions of "Fast Offline Analysis GRB240825A August 2024 P068"

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(Analysis Results)
(Theta2 plot)
 
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[[File: | 600 px]]
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[[File: GRB240825A_data_quality1.PNG| 500 px]] <br>
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[[File: GRB240825A_data_quality2.PNG| 500 px]]
  
 
*Data quality selection: Almost runs did not survive the default dR/dI@442pe limit of 1.5.  
 
*Data quality selection: Almost runs did not survive the default dR/dI@442pe limit of 1.5.  
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* Energy range: 10 GeV - 10 TeV
 
* Energy range: 10 GeV - 10 TeV
  
 +
'''No detection'''
  
=== Daily results ===
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[[File:GRB240825A_theta2plotPNG.PNG|700px]]
  
Dark NSB image cleaning: No detection
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=== Stacked observations ===
  
[[File:GRB240825A_theta2plotPNG.PNG|700px]]
+
[[File:GRB240825A_theta2plot_stacked.PNG|400px]]
  
 
=== Significance and Excess sky maps ===
 
=== Significance and Excess sky maps ===
[[File:GRB240825A skymap.PNG|700px]]
+
 
 +
LZA observations - the energy threshold is increased from 200 GeV to 500 GeV.
 +
 
 +
[[File:GRB240825A_skymap_LZA.PNG|700px]]
  
 
=== Spectral results ===
 
=== Spectral results ===
  
 
=== Light curve ===
 
=== Light curve ===

Latest revision as of 15:15, 28 August 2024

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] 


GRB240825A data quality1.PNG
GRB240825A data quality2.PNG

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

GRB240825A theta2plotPNG.PNG

Stacked observations[edit]

GRB240825A theta2plot stacked.PNG

Significance and Excess sky maps[edit]

LZA observations - the energy threshold is increased from 200 GeV to 500 GeV.

GRB240825A skymap LZA.PNG

Spectral results[edit]

Light curve[edit]