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- 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
Discussion
- 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
- 1ES 0229+200 is a faint source for Astrosat-SXT, 74 ks exposure obtained in 2021 August
- Modeled as an absorbed power law
- Excess above 5 keV may be due to background and features below 0.5 keV may be residual calibration artifacts
- Astrosat-UVIT data is yet to be released
- There is also a previous observation by Astrosat (that may not be available yet)
Actions:
- Jamie Kennea - will contact Andy B. to see if Swift-XRT data for 1ES 0229+200 will be analyzed
- Renee Ludlam - Will work with Felix F. on joint analysis of NICER observations of 1ES 0229+200
The meeting concluded after a discussion about supporting IXPE in-flight calibration
- Launch scheduled for Dec 9th, 2021
- There are many coordinated observations approved for scientific programs with INTEGRAL, XMM-Newton, NuSTAR, etc.
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2021 May 13th Working group meeting
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