Fast Offline Analysis 4C+27.50 November 2024 P071

Go back to Logbook_of_ToO

Fast offline analysis 4C+27.50 November 2024 P071

General information

• Name of the source: 4C+27.50
• Brief description of the source:
  • Object type : FSQR
  • Redshift (z) : 1.25
  • Other relevant information
  • RA: 23 21 59.862 (hh mm ss), Dec: +27 32 46.44 (dd mm ss)
  • RA, Dec in deg (ICRS): 350.49942593, 27.54623436

• Analysis by:
  • Javier Méndez-Gallego (IAA-CSIC - jmendez@iaa.es)

Data-taking information

• Dates of data-taking:
  • 2024-11-22 (2.21 h)
    • ZD range (deg): 10-50
    • Observations:

2024-11-22: [19750, 19751, 19752, 19753, 19754, 19755, 19756]

• • 2024-11-23 (1.53 h)
    • ZD range (deg): 10-50
    • Observations:

2024-11-23: [19773, 19774, 19775, 19776, 19777, 19778, 19779]

• Data quality selection:

• Joint observations with MAGIC?: No
• Information on data-taking (observations summaries): Run number 19757 was interrupted. Some rate spikes reported. [1]

General analysis information

• source-independent analysis
• lstchain version: v0.10.12
• DL1b standard production (v0.10/tailcut84), run-wise merged files in:

/fefs/aswg/data/real/DL1/20241122/v0.10/tailcut84/dl1_LST-1.Run?????.h5
/fefs/aswg/data/real/DL1/20241123/v0.10/tailcut84/dl1_LST-1.Run?????.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_2276

Random forest

Path to the models used: (example below)

/fefs/aswg/data/models/AllSky/20240131_allsky_v0.10.5_all_dec_base/dec_2276

DL2 data

The config file to produce the DL2 files must be the one used to produce the RF models. Should be located together with model's files.

Files in:

/fefs/aswg/workspace/javier.mendez/foa_P071/nov22/4C+27.50/dl2-like_step
/fefs/aswg/workspace/javier.mendez/foa_P071/nov23/4C+27.50/dl2-like_step

DL3 data & IRF

Files in:

/fefs/aswg/workspace/javier.mendez/foa_P071/nov22/4C+27.50/dl3-like_step
/fefs/aswg/workspace/javier.mendez/foa_P071/nov23/4C+27.50/dl3-like_step

Configuration used for producing IRF/DL3 files (you can leave standard settings):

 "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": 0.95,
   "min_theta_cut": 0.0,
   "max_theta_cut": 0.2,
   "fill_theta_cut": 0.2,
   "allowed_tels": [1]
 },

• Standard cuts: Intensity > 50 p.e., 70 % efficiency for both gammaness and theta gamma-ray selection energy-dependent cuts.
• Max theta cut: 0.2 deg.
• Point-like IRF.

High-level analysis and results

Analysis settings

• Gammapy version: 1.1
• 1D analysis (point-like IRF)

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: 0.01-10.0 TeV

Daily results

• 2024-11-22: Non detected

• 2024-11-23: Non detected

Stacked observations

Significance and Excess sky maps

Spectral results

• Nov 22. Fitted to a power-law spectrum.

  type      name      value         unit        error      min    max frozen is_norm link
-------- ---------- ---------- -------------- --------- --------- --- ------ ------- ----
spectral     index  2.8090e+00                4.803e-01 nan nan  False   False     
spectral amplitude  2.6708e-12 TeV-1 s-1 cm-2 2.147e-12 nan nan  False    True     
spectral reference  5.4830e-01            TeV 0.000e+00 nan nan   True   False