XMM 1 EPIC MOS Monitoring CAL/OPS Meeting MPE 04.-05.05.2006.

1Martin Stuhlinger, ESAC

XMM

EPIC MOS Monitoring

CAL/OPS Meeting

MPE 04.-05.05.2006

XMM-Newton

2

Martin Stuhlinger, ESAC

MOS line monitoring

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EPIC MOS line monitoring: public CCFs

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EPIC MOS CCF update: new CTI+ADUCONV

• CTI and ADUCONV CCFs use identical epochs

• New CCFs: 13 time epochs– 8 pre-cooling epochs (previously 7 epochs)– 5 post-cooling epochs

• CTI: previously 1 epoch• ADUCONV: previously 2 epochs (correction of incorrect on-

board voltages between rev.1030-1074)

• See CCF release notes– CTI: XMM-CCF-REL-206– ADUCONV: XMM-CCF-REL-207

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EPIC MOS CTI monitoring: new CCFs

Parallel CTI MOS1 Al Parallel CTI MOS2 Al

CCD1

CCD2

CCD3

CCD4

CCD5

CCD6

CCD7

0.06

0.00

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Parallel CTI MOS1 Mn Parallel CTI MOS2 Mn

CCD1

CCD2

CCD3

CCD4

CCD5

CCD6

CCD7

0.00

0.06

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Serial CTI MOS1 Al Serial CTI MOS2 Al

CCD1

CCD2

CCD3

CCD4

CCD5

CCD6

CCD7

0.00

0.04

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Serial CTI MOS1 Mn Serial CTI MOS2 Mn

CCD1

CCD2

CCD3

CCD4

CCD5

CCD6

CCD7

0.00

0.04

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EPIC MOS line monitoring: new CCFs

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MOS2 CCD5 noise monitoring

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MOS2 CCD5 noise monitoring: MOS2

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MOS2 CCD5 noise monitoring: MOS1

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MOS1 CCD4 example subsequent exposures

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MOS2 CCD5 noise monitoring

• Still searching possible triggers

• No trigger found from HK parameters:– Radiation monitors (HE0, LE0, RGS1, RGS2)– MOS2 CCD5 voltages (K1181-1196)– MOS2 Focal plane temperature (K1253)– Many more temperatures and voltages (EMVC, EMCR,…)– Any idea?

• Search will be repeated for MOS1 CCD4– Sudden appearance– Shows decay

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Monitoring of the “meteoroid” column in MOS1 CCD1

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Column appears and disappears

• Column was off since change of on-board offset June 2005.

• Re-appeared in rev. 1100-1115: Diagnostic shows column offset to be 130 ADU (instead of 123 ADU).

• At lower level or disappeared in rev. 1116-1122: Diagnostics show column offset back on expected level.

• During and after eclipse phase rev.1123-1135 column sometimes is hot and sometimes normal.

• Not hot column from rev. 1136-1148.

• Column present in single exposures from 1149-1156.

• Not hot column since rev. 1157 (-1172).

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EPIC telemetry monitoring

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Required telemetry of EPIC instruments

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Required EPIC telemetry after rev. 620

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Conclusion

• CTI:– Parallel CTI very stable since cooling. Nearly constant over

the last 600 revolutions!– Serial CTI stable since cooling. Only MOS2 CCD7 showed a

step-like degradation.

• Line monitoring:– Line energies within 5 eV for all epochs.– Line widths (FWHM) stable since cooling: ~80 eV at Al

energy and ~140 eV at Mn energy

• MOS2 CCD5 noise:– In MOS2 CCD5 present in phases all over the mission.– Possible triggers not yet found.– MOS1 CCD4 suddenly highly affected, slow decrease.– Single appearances several CCDs.

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Conclusion

• MOS1 (sometimes hot) meteoroid column:– Stable for 6 months after change of on-board offset.– Re-appeared after save/idle mode and (some) eclipses.– Possible triggered by temperature changes? Unlikely!

• Change of the EPIC BRAT:– Decrease MOS telemetry to 12 kbits/sec.– Increase pn telemetry to 24 kbits/sec.– After rev. 620: 112 MOS1 and 91 MOS2 observations

require more than 12 kbits/sec, but nearly all suffer from high background radiation.

– Less than 20 observation without high background radiation require more than 12 kbits/sec.

– Details see XMM-SOC-OPS-TN-006.

XMM 1 EPIC MOS Monitoring CAL/OPS Meeting MPE 04.-05.05.2006.

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Transcript of XMM 1 EPIC MOS Monitoring CAL/OPS Meeting MPE 04.-05.05.2006.