Fast offline analysis M87 June 2024

General information

• Name of the source: M87
• Brief description of the source:
  • Object type : Radio galaxy
  • Redshift (z) : 0.0042
  • Other relevant information
  • RA: (hh mm ss), Dec: (dd mm ss)
  • RA, Dec in deg (ICRS): 187.70593077, 12.39112325
• Analysis by:
  • Lea Heckmann (MPP - heckmann@mpp.mpg.de)

Data-taking information

• Dates of data-taking: 2024-06-07
  • • ZD range (deg): --> 25 - 40 deg
    • AZ range (deg): -->
    • Transmission9km:
    • Observation condition: dark
    • Observation mode: std wobbles
    • Runs: 17676 - 17681
    • Observations:

'2024-06-07': [17676, 17677, 17678, 17679, 17680, 17681]  h

• Data quality selection applied on above data sample: all data passes, just 17678 < 1 min, so not taken into account
• Joint observations with MAGIC? : From 17679 on
• Information on data-taking (observations summaries): https://www.lst1.iac.es/datacheck/observation_overview/2024/06/run_summary_2024_06_07.pdf

General analysis information

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

/fefs/aswg/data/real/DL1/20240607/v0.10/tailcut84/dl1_LST-1.17676.h5
/fefs/aswg/data/real/DL1/20240607/v0.10/tailcut84/dl1_LST-1.17677.h5
/fefs/aswg/data/real/DL1/20240607/v0.10/tailcut84/dl1_LST-1.17678.h5
/fefs/aswg/data/real/DL1/20240607/v0.10/tailcut84/dl1_LST-1.17679.h5
/fefs/aswg/data/real/DL1/20240607/v0.10/tailcut84/dl1_LST-1.17680.h5
/fefs/aswg/data/real/DL1/20240607/v0.10/tailcut84/dl1_LST-1.17681.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_931

Random forest

Path to the models used:

/fefs/aswg/data/models/AllSky/20240131_allsky_v0.10.5_all_dec_base/dec_931

DL2 data

Config file:

/fefs/aswg/data/models/AllSky/20240131_allsky_v0.10.5_all_dec_base/dec_931/lstchain_config_2024-01-31.json

Files in:

/fefs/aswg/workspace/lea.heckmann/FOA/M87_20240607/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

• 2024-06-07

Significance and Excess sky maps

Using notebook from LST analysis school (ring background FoV method)

Spectral results

• 2024-06-07

Spectral parameters: PL

No enough signal

Light curve

• 2024-06-07

not enough signal