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XMMEPICMOS
Steve Sembay ([email protected])EPIC Calibration MeetingRingberg 2-5/April/2002
Broad-Band MOS v PN Cross-Calibration Study8 Observations of 4 BL Lacertae Objects
MOS - SAS 5.3 (development version) event files
Pattern 0-12 (all X-ray) selected events
MOS Q20 and Q21 response matrices
CCF and LUX PSF correction
PN - Jan02 MPE processed events files
Pattern 0-4 (singles + doubles) selected events
PN - Nov01 (FF) and Jan02 (SW) response matrices
CCF PSF correction
Pile-up events excluded by pattern ratio analysis
XMMEPICMOS
Steve Sembay ([email protected])EPIC Calibration MeetingRingberg 2-5/April/2002
Object Rev Annulus Mode M1 Filter M2 Filter PN Filter
MS0737 0063 0-26 FF Thin Thin Thin
MS1229 0082 0-44 FF Thin Thin Thin
Mrk 421 0165 8-44 SW Medium Medium Thick
Mrk 421 0171 18-44 SW Medium Medium Thick
Mrk 421 0259 18-44 SW Thin Thin Thin
PKS 2155 0362 15-40 SW Medium Medium -
PKS 2155 0362 15-40 SW Thick Medium -
PKS 2155 0362 15-40 SW Thin Medium Medium
Observation Summary
XMMEPICMOS
Steve Sembay ([email protected])EPIC Calibration MeetingRingberg 2-5/April/2002
Analysis Method:Define non-piled-up annulus from MOS1 data (use same for MOS2, pn).
Generate appropriate arf correction files.
Extract source and background spectra (although background mostly
negligible) in the 0.2-10 keV band.
Fit phabs * bknp model to MOS2 data…fold model through MOS1,
MOS2 and pn instrument response.
Fit phabs * bknp model to pn data…fold model through MOS1,
MOS2 and pn instrument response.
Examine DATA/MODEL ratio plots for trends.
Examine best-fit model parameters to instruments fitted individually.
XMMEPICMOS
Steve Sembay ([email protected])EPIC Calibration MeetingRingberg 2-5/April/2002
+5%
-5%
+20%
-20%
Ratio Plot:
DATA/MODEL
MOS1
MOS2
PN
Smoothed:
MOS1
MOS2
PN
+20%
+5%
-5%
-20%
XMMEPICMOS
Steve Sembay ([email protected])EPIC Calibration MeetingRingberg 2-5/April/2002
Effect of Q20 to Q21
PKS2155 0362 15-40 SW Med/Med CCF-PSF
Q20 Q21
XMMEPICMOS
Steve Sembay ([email protected])EPIC Calibration MeetingRingberg 2-5/April/2002
Calibration of MOS1 Thick Filter
PKS2155 0362 15-40 SW Thick/Med
XMMEPICMOS
Steve Sembay ([email protected])EPIC Calibration MeetingRingberg 2-5/April/2002
MS0737 0063 0-26 FF Thin/Thin/Thin MS1299 0082 0-44 FF Thin/Thin/Thin
XMMEPICMOS
Steve Sembay ([email protected])EPIC Calibration MeetingRingberg 2-5/April/2002
Mrk 421 0259 18-44 SW Thin/Thin/Thin
XMMEPICMOS
Steve Sembay ([email protected])EPIC Calibration MeetingRingberg 2-5/April/2002
PKS2155 0362 15-40 SW Thin/Med/Med
XMMEPICMOS
Steve Sembay ([email protected])EPIC Calibration MeetingRingberg 2-5/April/2002
Mrk421 0165 8-44 SW Med/Med/Thick Mrk421 0171 18-44 SW Med/Med/Thick
XMMEPICMOS
Steve Sembay ([email protected])EPIC Calibration MeetingRingberg 2-5/April/2002
0-26ThinThinThin
8-44MedMedThick
15-40MedMed
15-40ThinMedMed
18-44MedMedThick
18-44ThinThinThin
Trends due to PSF ?
--- CCF-PSF Corrected
XMMEPICMOS
Steve Sembay ([email protected])EPIC Calibration MeetingRingberg 2-5/April/2002
8-44
15-40
18-44
CCF PSF LUX PSF
Comparison of CCF and LUX PSF correction
XMMEPICMOS
Steve Sembay ([email protected])EPIC Calibration MeetingRingberg 2-5/April/2002
Q20 - Q21 increases relative difference between model fits to MOS1 and MOS2 data in the high energy band.
Q21 residuals better than Q20 in 2-3 keV band.
Both MOS and PN show consistent residual features at different energies indicating narrow band calibration problems.
MOS1 Thick filter calibration is incorrect.
Energy correction due to PSF creates an increasing discrepancybetween MOS1 and MOS2 as extraction radius increases.
There is a systematic broad band difference between MOS and PNwhich is independent of Mode/Filter/Extraction radius.
Interim Conclusions
What do the spectral parameters tell us ?
XMMEPICMOS
Steve Sembay ([email protected])EPIC Calibration MeetingRingberg 2-5/April/2002
Spectral Fit Parameters:
Mrk 421 NH = 1.6e20 z = 0.031
PKS 2155 NH = 1.36e20 z = 0.116
MS 0737 NH = 3.2e20 z = 0.315
PN Thick 0.89 (0.15) 1.77 (0.04) 0.69 (0.01) 2.59 (0.01) 1.37/1191
MOS2 Med 1.33 (0.15) 2.37 (0.02) 1.82 (0.11) 2.55 (0.03) 1.39/404
PN Med <0.25 2.09 (0.05) 0.73 (0.02) 2.82 (0.02) 1.38/720
MOS2 Med 1.36 (0.25) 2.66 (0.04) 1.59 (0.20) 2.90 (0.05) 1.22/266
PN Thin 3.60 (0.07) 1.63 (0.20) 0.64 (0.05) 2.35 (0.03) 0.99/475
MOS2 Thin 4.92 (0.10) 2.21 (0.05) 1.72 (0.90) 2.25 (0.05) 1.08/165
NH Γ1 EB Γ2 χ2υ