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EPIC MOS Monitoring. CAL/OPS Meeting MPE 04.-05.05.2006. MOS line monitoring. EPIC MOS line monitoring: public CCFs. 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
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EPIC MOS Monitoring CAL/OPS Meeting MPE 04.-05.05.2006
MOS line monitoring Martin Stuhlinger, ESAC
EPIC MOS line monitoring: public CCFs Martin Stuhlinger, ESAC
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 Martin Stuhlinger, ESAC
EPIC MOS CTI monitoring: new CCFs Parallel CTI MOS1 Al Parallel CTI MOS2 Al 0.06 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 0.00 Martin Stuhlinger, ESAC
EPIC MOS CTI monitoring: new CCFs Parallel CTI MOS1 Mn Parallel CTI MOS2 Mn 0.06 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 0.00 Martin Stuhlinger, ESAC
EPIC MOS CTI monitoring: new CCFs Serial CTI MOS1 Al Serial CTI MOS2 Al 0.04 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 0.00 Martin Stuhlinger, ESAC
EPIC MOS CTI monitoring: new CCFs Serial CTI MOS1 Mn Serial CTI MOS2 Mn 0.04 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 0.00 Martin Stuhlinger, ESAC
EPIC MOS line monitoring: new CCFs Martin Stuhlinger, ESAC
EPIC MOS line monitoring: new CCFs Martin Stuhlinger, ESAC
EPIC MOS line monitoring: new CCFs Martin Stuhlinger, ESAC
EPIC MOS line monitoring: new CCFs Martin Stuhlinger, ESAC
MOS2 CCD5 noise monitoring Martin Stuhlinger, ESAC
MOS2 CCD5 noise monitoring: MOS2 Martin Stuhlinger, ESAC
MOS2 CCD5 noise monitoring: MOS1 Martin Stuhlinger, ESAC
MOS1 CCD4 example subsequent exposures Martin Stuhlinger, ESAC
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 Martin Stuhlinger, ESAC
Monitoring of the “meteoroid” column in MOS1 CCD1 Martin Stuhlinger, ESAC
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). Martin Stuhlinger, ESAC
EPIC telemetry monitoring Martin Stuhlinger, ESAC
Required telemetry of EPIC instruments Martin Stuhlinger, ESAC
Required EPIC telemetry after rev. 620 Martin Stuhlinger, ESAC
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. Martin Stuhlinger, ESAC
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. Martin Stuhlinger, ESAC