Page History

...

Model parameters from the 2017 observations

Cross normalization constants from the pairs of observations are shown on the left. Note:

- The Swift fluxes appear relatively high - perhaps due to the extraction annulus used - the analysis will be checked wit the Swift team
- Analysis above 1 keV chosen to avoid known soft excess in 3C 273 spectrum

Communication with the Chandra team is underway to check the Chandra analysis
The NuSTAR analysis will be redone with the updated calibration released this month (2021 October)
NICER observations will also be folded into the analysis (Renee Ludlam)
Analysis will be extended to evaluate within the concordance framework (arXiv)
- Flux ratio examined in narrow energy bands - model independent
There is some complexity to the XMM spectrum - Felix Fuerst
- with correlated residuals between instruments
Work is continuing and will include the 2021 XMM-Newton observations as well as the NICER observations.

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 Added

...

...

Versions Compared