Galactic Center

Up to category: Data analysis

Note: Under construction

General Information

• Name: Galactic Center, Central region of the Milky Way
• Brief description:
  • Object type: Extended source
  • Distance: 8.5 kpc

• TeV gamma-ray objects
  • Sagittarius A*
    • RA: 17 45 40.04 (hh mm ss), Dec: -29 00 28.17 (dd mm ss) (ICRS)

Data-taking Information

Run-by-run summary: List of Galactic-center observations

2021

• Date (time of observation h)
  • • ZD range (deg): Zenith Range
    • AZ range (deg): Azimuth Range
    • Transmission9km:
    • Runs:
    • Joint observations with MAGIC? : Yes/No

2022

• To be observed

Data Analysis

• Data Search & Quality Check
  • based on Abelardo's notebook, as of Dec 2022. 212 Runs (50.0 hr) found.
  • 171 runs (41.6 hr) survived the notebook. Additionally, 6 runs were removed, judging from the size distribution.
  • ToDo: systematic check of the size distribution, introduce the Zd dependence.
  • Will be updated (as of Nov 2023)

• Used Data
  • Observation Data
    • paths: /fefs/aswg/data/real/DL1/*/v0.9/tailcut84/dl1_LST-1.Run*.h5
  • MC
    • To use the diffuse MCs both for testing/training, we manually split the Training MCs.
    • split ratio (train/test): 50/50 for Gamma, 80/20 for Proton
    • paths: /fefs/aswg/data/mc/DL1/AllSky/20221027_v0.9.9_base_prod/TrainingDataset/dec_min_2924/GammaDiffuse
    • ToDo: NSB tuning

• Analysis Pipilines
  • lstchain v0.9.9
  • pybkgmodel
  • gammapy v0.20.1
  • ToDo: software update

• Random Forest
  • We train RFs on the node-by-node basis
  • keys: "x", "y" were removed for the FoV stability, "sin_az_tel", "alt_tel" were removed for node-by-node RFs
  • ToDo: comparison with trajectory RFs. Incorpolate the recent development from the Boomerang team presented in LST General Meeting (Nov 2023).

• DL2 to DL3
  • to be written

• Background Modeling
  • to be written

• Modeling
  • to be written

Internal Meeting

• 2022
  • MC/Data Comparison at Large Zd (LST-Fund, 21st Jun 2022)
  • Galactic Center Status Report, Background Tools (LST-Gal 30th Sep 2022)
  • Large-Zd Performance Study (LST General, 17th Oct 2022)
  • 1D Spectral Analysis of Large-Zd Crab and Gal. Center (LST-Reco, 19th Dec 2022)
• 2023
  • SkyMap Prototype (LST-Reco, 13 Feb 2023)
  • Initial 3D Analysis (LST-Fund, 3rd May, 2023)
  • Background Modeling (LST-Reco, 5th June 2023)
  • Skymap and 3D analysis for point-like sources (LST General, 19th June 2023)
  • Discussion on WIMP search and Background Improvement (LST-Fund, 18th Oct 2023)
  • Improvement of High-Energy Background Modeling and Analysis of the Diffuse Ridge Emission (LST General, 9th Nov 2023)
  • Plans for the Cycle-II LST-Mono Proposal (LST-Gal, 15th Dec 2023)

Conferences

• 2022
  • JPS Spring 2022 (Mar 2022)
  • JPS Autumn 2022 (Sep 2022)
• 2023
  • JPS Spring 2023 (Mar 2023)
  • TeVPA 2023 (Sep 2023)
  • ASJ Autumn 2023 (Sep 2023)