PKS1424+240 (LST) analysis - neutrino candidate

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Revision as of 16:21, 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 information

Data quality

File:Data quality.jpg

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.