Fast Offline Analysis S4 1926+61 August 2024 P068

General information

• Name of the source: S4 1926+61
• Brief description of the source:
  • Object type : FSRQ
  • Redshift (z) : 0.54
  • Other relevant information
  • RA, Dec in deg (ICRS): (291.87684533, 61.29246636)
• Analysis by:
  • Joshua Baxter (ICRR - joshua28@icrr.u-tokyo.ac.jp)

Data-taking information

• Dates of data-taking: 2024-08-28
  • • ZD range (deg): --> 36-45 deg
    • AZ range (deg): -->
    • Transmission9km:
    • Observation condition: dark
    • Observation mode: std wobbles
    • Observations:

'2024-08-28':  [18710 18711 18714 18715 18716] 1.15 hours

• Data quality selection: All runs passed
• Joint observations with MAGIC? : no
• Information on data-taking (observations summaries): https://www.lst1.iac.es/datacheck/observation_overview/2024/08/run_summary_2024_08_28.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/DL1/20240828/v0.10/tailcut84/dl1_LST-1.Run18710.h5 /fefs/aswg/data/real/DL1/20240828/v0.10/tailcut84/dl1_LST-1.Run18711.h5 /fefs/aswg/data/real/DL1/20240828/v0.10/tailcut84/dl1_LST-1.Run18714.h5 /fefs/aswg/data/real/DL1/20240828/v0.10/tailcut84/dl1_LST-1.Run18715.h5 /fefs/aswg/data/real/DL1/20240828/v0.10/tailcut84/dl1_LST-1.Run18716.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_6166

Random forest

Path to the models used:

/fefs/aswg/data/models/AllSky/20240131_allsky_v0.10.5_all_dec_base/dec_6166

DL2 data

Config file (standard):

/fefs/aswg/data/models/AllSky/20240131_allsky_v0.10.5_all_dec_base/dec_6166/lstchain_config_2024-01-31.json

Files in:

/home/joshua.baxter/Work/LST-1_analysis/FOA/S4_1926+61/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,
   "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:

/home/joshua.baxter/Work/LST-1_analysis/FOA/S4_1926+61/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

2024-08-28: No detection