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NuSTAR observations of 1ES 0229+200  -  Hannah Earnshaw   (pdf)

  • Three exposures obtained in August, 2021 (200 ks total)
    • Compared to three short (~20 ks each) exposures obtained in 2013
    • Spectrum can be modeled as an absorbed power law or a log-parabola continuum
  • The source appears softer (gamma 2.03 -> 2.25) and fainter (about 25%) in the 2021 observations compared to 2013
  • Even at historically low flux state the source is still sufficient for cross-calibration purposes

Image RemovedImage Added

Swift-XRT monitoring of 1ES 0229+200


1ES 0229 with XMM-Newton and its impact on calibration - Felix Fuerst    (pdf)

  • 1ES 0229+200 observed on Oct 8-10, 2021
    • 18.8 ks full frame exposure lost due to very bad background flaring
    • Analysis of 60 ks small window EPIC-pn exposure presented
    • can be modeled as an absorbed power law or cutoff power law
  • Combined analysis with simultaneous 95 ks NuSTAR observation
    • Fit improved with cutoff power law above 20 keV
    • New NUSTAR calibration (CALDB20211020) improves agreement between NuSTAR FPM modules
  • Analysis of joint XMM / NuSTAR observing campaign on the Crab was presented
    • Observations performed every ~6 months
  • Observations are used to create a correction functionfor EPIC-pn ARF
    • Correction function will be vetted with more observations (calculated using MCMC)
  • Analysis of joint observations of 3C 273 and 1ES 0229+200 indicate that EPIC-pn normalization is ~83% of (updated) NuSTAR FPMA
  • Calibration update for EPIC-pn is being developed
  • Power-law slope of 1ES 0229+200 will be evaluated with XMM-MOS+OM and Swift-XRT+UVOT data

 

  • It was noted that the new NuSTAR calibration appears to push the relative normalizations of XMM-pn and NuSTAR-FPM further apart
  • Need to be careful to use similar extraction regions in analysis of Crab observations for cross-calibration purposes 
    • (extended source so observations at different epochs = different roll can sample different areas of the remnant)
  • Chandra observations show spectral curvature 
    • however no improvement is seen when more complex models are used

 

Observation of 1ES 0229+200 with Astrosat - Sunil Chandra

 

 

 




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2021 May 13th Working group meeting     

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