PKS1424+240 (LST) analysis - neutrino candidate

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Revision as of 16:50, 13 September 2024 by Gloria Maria Cicciari (talk | contribs) (Analysis of LST-1 PKS 1424+240 - neutrino candidate)
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Analysis of LST-1 PKS 1424+240 - neutrino candidate

General information

Name of the source: PKS 1424+240

Pks1424+240 aladin.png

Brief description of the source:

  • It is the farthest BL Lac detected at TeV
  • It is an IBL/HBL
  • z ~ 0.6
  • RA, Dec (deg) : 216.75163247, 23.80001042

Analysis by Name (Institute - email)

  • Davide Cerasole
  • Gloria Maria Cicciari (gloriamaria.cicciari@unipa.it)
  • Sara Fogliaceo
  • Serena Loporchio
  • Manuela Mallamaci
  • Salvatore Mangano
  • Giovanni Marsella
  • Elisa Prandini
  • Ilaria Viale
  • Elisa Visentin

Data-taking information

Cycle I observations 2023-01-23 to 2023-07-17

  • Dates of data-taking: 2023/01/23, 2023/01/27, 2023/03/10, 2023/04/18, 2023/05/12, 2023/05/15, 2023/05/22, 2023/07/17
  • Observation runs selected are: [11805 11806 11807 11808 11933 11934 11935 11936 11937 12747 12748 12749 12750 12957 12958 12959 12960]
  • Total livetime of all observations (hrs): 19.7
  • Total livetime of selected observations (hrs): 3.29
  • ZD range (deg): 0 - 60

Analysis steps

  • R0 : uncalibrated RAW waveforms from the camera
  • R1 : calibrated waveforms from the camera
  • DL1a : integrated charge and peak position of the waveform
  • DL1b : image parameters (width, length, intensity…)
  • DL2 : event parameters (energy, direction, time…)
  • DL3 : lists of reconstructed events after event selection with corresponding IRFs

Analysis steps.png

Analysis information

Data quality

Data quality.png

The list with the runs passing data quality

Data quality list.png

Monte Carlo simulations

/fefs/aswg/data/mc/DL2/AllSky 20240131_allsky_v0.10.5_all_dec_base/TestingDataset/dec_2276/

DL1 data

/fefs/aswg/data/real/DL1/YYYYMMDD/v0.10/tailcut84/dl1_LST-1.RunXXXXX.h5

Random forest

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

DL2 data

 /fefs/aswg/workspace/gloriamaria.cicciari/DL3/PKS1424/

DL3 data and IRF

 /fefs/aswg/workspace/gloriamaria.cicciari/DL3/PKS1424/


Analysis results

Preliminary Theta2 plots

Theta2 plots obtained from DL2 data using the explore_DL2.ipynb code

Theta2 low energy PKS1424 nu candidate.png

Energy range: 0.0 - 0.2 TeV
Excess: 690.000; Off: 155056
Gamma rate: 0.675 events / minute
Off rate: 151.779 events / minute
alpha (backg normalization): 1.000
Li & Ma Significance: 1.24 standard deviations

Theta2 high energy PKS1424 nu candidate.png

Energy range: 0.2 - 1000000.0 TeV
Excess: -6.333; Off: 415
Gamma rate: -0.006 events / minute
Off rate: 0.406 events / minute
alpha (backg normalization): 0.333
Li & Ma Significance: 0.00 standard deviations

Theta2 plots

Theta2 plots obtained from DL3 data using the post_DL3_analysis.ipynb code

Theta2 PKS1424 nu candidate.png

Excess plots

Excess plots obtained from DL3 data using the post_DL3_analysis.ipynb code

Excess plot PKS1424 nu candidate.png

SED and LC

SED and LC obtained from DL3 data using the post_DL3_analysis.ipynb code

SED and LC preliminaries that only give us the upper limits. (We reserve the use of a more polished code for analysis).

Sed and light curve pks1424 nu candidate.png


The analysis will need to be fine-tuned because of the lack of detection.