MOS 1 Timing Mode noise echo of the

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MOS 1 Timing Mode noise echo of the meteorite column Madrid, 23. March 2009

MOS 1 Timing Mode noise echo of the meteorite column Madrid, 23. March 2009 XMM-Newton M. Stuhlinger, ESAC 1

Discovery history: • During analyses of MOS 1 timing mode exposures. • My MOS

Discovery history: • During analyses of MOS 1 timing mode exposures. • My MOS 1 timing mode spectrum of highly absorbed source 1 E 1740. 72942 looks very different to MOS 2/pn at low energies. • Same spectrum extracted by Carlos Gabriel agrees with MOS 2 and does not show low energy features. XMM-Newton M. Stuhlinger, ESAC 2

Different spectra extractions cause different appearance XMM-Newton M. Stuhlinger, ESAC 3

Different spectra extractions cause different appearance XMM-Newton M. Stuhlinger, ESAC 3

Discovery history: • During analyses of MOS 1 timing mode exposures. • My MOS

Discovery history: • During analyses of MOS 1 timing mode exposures. • My MOS 1 timing mode spectrum of highly absorbed source 1 E 1740. 72942 looks very different to MOS 2/pn at low energies. • Same spectrum extracted by Carlos Gabriel agrees with MOS 2 and does not show low energy features. • Where do “my” low energy counts come from? Columns 320 -327 show noise component shifted to lower energies with increasing RAWX. XMM-Newton M. Stuhlinger, ESAC 4

1 E 1740. 7 -2942 XMM-Newton M. Stuhlinger, ESAC 5

1 E 1740. 7 -2942 XMM-Newton M. Stuhlinger, ESAC 5

RAWX 320 RAWX 321 RAWX 322 RAWX 323 RAWX 324 RAWX 325 1 E

RAWX 320 RAWX 321 RAWX 322 RAWX 323 RAWX 324 RAWX 325 1 E 1740. 7 -2942 XMM-Newton M. Stuhlinger, ESAC 6

Discovery: • During analyses of MOS 1 timing mode exposures. • My MOS 1

Discovery: • During analyses of MOS 1 timing mode exposures. • My MOS 1 timing mode spectrum of highly absorbed source 1 E 1740. 72942 looks very different to MOS 2/pn at low energies. • Same spectrum extracted by Carlos Gabriel agrees with MOS 2 and does not show low energy features. • Where do “my” low energy the counts come from? Columns 322 -325 show noise component shifted to lower energies with increasing RAWX. • Why the difference? We both exclude the hot column RAWX=319. Carlos used RAWX [300: 316] (left PSF wing only), I used RAWX [300: 317] or [321: 330] (both PSF wings with gap). XMM-Newton M. Stuhlinger, ESAC 7

6 pixels to be ignored 1 E 1740. 7 -2942 XMM-Newton M. Stuhlinger, ESAC

6 pixels to be ignored 1 E 1740. 7 -2942 XMM-Newton M. Stuhlinger, ESAC 8

RAWX 319 MOS 1 1 E 1740. 7 -2942 (rev. 1065): PI versus RAWX

RAWX 319 MOS 1 1 E 1740. 7 -2942 (rev. 1065): PI versus RAWX 320 RAWX 321 PI RAWX 322 RAWX 323 RAWX 324 RAWX 325 XMM-Newton M. Stuhlinger, ESAC 9

MOS 1 Swift J 1753. 5 -0127 (rev. 1152): PI versus RAWX 320 PI

MOS 1 Swift J 1753. 5 -0127 (rev. 1152): PI versus RAWX 320 PI RAWX 319 RAWX 321 RAWX 322 RAWX 323 RAWX 324 RAWX 325 XMM-Newton M. Stuhlinger, ESAC 10

MOS 1 4 U 0142+61 (rev. 1300): PI versus RAWX PI RAWX 319 RAWX

MOS 1 4 U 0142+61 (rev. 1300): PI versus RAWX PI RAWX 319 RAWX 320 RAWX 321 RAWX 322 RAWX 323 RAWX 324 RAWX 325 XMM-Newton M. Stuhlinger, ESAC 11

Conclusions: • Noise echo of meteorite column in RAWX [320: 325] is common feature

Conclusions: • Noise echo of meteorite column in RAWX [320: 325] is common feature in MOS 1 timing modes. • Most probable noise echo is created within serial readout process. • For extraction of MOS 1 timing mode spectra (Rev. >961): Better ignore RAWX [318: 325] • Large fraction of the right (higher RAWX values) PSF wing is lost! • Already recommended: Avoid MOS 1 observations in timing mode. XMM-Newton M. Stuhlinger, ESAC 12

echo print echo pr 16 echo 5 echoecho print echo pr 16 echo 5 echo
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MOS Capacitors 1 Ideal MOS Capacitor 2 MOSMOS Capacitors 1 Ideal MOS Capacitor 2 MOS
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EPIC Calibration of the EPIC MOS Timing ModeEPIC Calibration of the EPIC MOS Timing Mode
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MOS Timing Mode calibration Marcus G F KirschMOS Timing Mode calibration Marcus G F Kirsch
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Timing Diagram and Communication Diagram TIMING DIAGRAM TimingTiming Diagram and Communication Diagram TIMING DIAGRAM Timing