XMM-Newton

1

Michael Smith, ESAC

PN Monitoring

Mallorca, April 2008

XMM-Newton

2

Michael Smith, ESAC

PN Hot Pixels

Mainly Column 64 Hot Pixels

XMM-Newton

3

Michael Smith, ESAC

PN Noisy Pixels (I)

Modified blanking of Column 64 segments in latest BPT updates.

XMM-Newton

4

Michael Smith, ESAC

Counts fraction due to noisy pixels per CCD:

CCD 11 column 64 noisy pixel counts fraction reduced in the rev. 1408 BPT.

Blanking of a further 8 pixels in the latest BPT(in use from rev. 1530 onwards).

CCD 11

PN Noisy Pixels (II)

XMM-Newton

5

Michael Smith, ESAC

PN Offset Median (I)

Increase in offset median: 2 – 5 ADU for Q0 CCDs since ~ Rev 1408

(Perhaps other CCDs also, e.g. CCD5)

Coincides with PN BPT implementation (Rev 1408); however, the PN db changes affected the CCD11 BPT only…

Similar to onset of theoffset median trend seen in Revs 605 – 660

XMM-Newton

6

Michael Smith, ESAC

PN Offset Median (II)

Regarding the Rev 605 – 680 offset median trend:

A correlation was found with the respective Quadrant VC Currents (params F1189-92)

(discussed at the Saclay 2003 Ops Meeting)…

J. Fauste, S. Rives

XMM-Newton

7

Michael Smith, ESAC

PN Offset Median (III)

F1189: Q0 VC Current

…however, in the recent trend:

NO correlation with VC Current found.

G. Buenadicha, P. Calderon

XMM-Newton

8

Michael Smith, ESAC

PN Offset Median (IV)

Perhaps a side-effect of the other database changes, e.g. RGS Single Node Readout?

Several analog electronics temperatures investigated, but NO CORRELATION found with PNoffset median trend.

P. Calderon

XMM-Newton

9

Michael Smith, ESAC

PN Offset Variance

Change in hot pixel offsets due to the rev. 1490 temperature excursion

XMM-Newton

10

Michael Smith, ESAC

M. Kirsch

PN CTI and Gain corrected energies v. revolution: the current long-term CTI parameters are no longer valid; a refined long term CTI is in the process of being released in a new CCF issue.

(Result of SAS 7.1 processing).

PN Energy Scale (I)

XMM-Newton

11

Michael Smith, ESAC

M. Kirsch

Line width trend is stable

~0.5 ADU/year increase at Mn

(Result of SAS 7.1 Processing)

PN Energy Scale (II)

XMM-Newton

12

Michael Smith, ESAC

PN CTI Determination (I)

PN CTI determination and monitoring to be taken over from MPE to ESAC.

- Determine line positions of first singles versus RAWY

- Fit exponential function to determine column CTE

XMM-Newton

13

Michael Smith, ESAC

PN CTI Determination (II)

Preliminary sanity check:

Comparison with Konrad Dennerl results.

CTI values generally agree within errors.

Still very much a work in progress...

Relative CTI per CCD (ObsID 0109270501)

XMM-Newton

14

Michael Smith, ESAC

MOS Monitoring

Bad Pixels & Background

Mallorca, April 2008

XMM-Newton

15

Michael Smith, ESAC

MOS Noisy Bad Pixels

Still fewer Noisy Pixels than before cooling.

However, some are very persistent and have been included in the most recent MOS BPT (in use from rev. 1515 onwards): 5 pixels for MOS1, and 11 for MOS2.

This should reduce count rates by 5 - 15% depending on the CCD.

XMM-Newton

16

Michael Smith, ESAC

XMM-Newton

17

Michael Smith, ESAC

MOS Line Monitoring

Mallorca, April 2008

XMM-Newton

18

Michael Smith, ESAC

XMM-Newton

19

Michael Smith, ESAC

MOS1_Al_width.ps

M. Stuhlinger

XMM-Newton

20

Michael Smith, ESAC

XMM-Newton

21

Michael Smith, ESAC

MOS Low Energy Noise Monitoring

(MOS2CCD5 Effect)

XMM-Newton

22

Michael Smith, ESAC

Low Energy Noise (MOS2CCD5-Effect):

MOS1

MOS2

XMM-Newton

23

Michael Smith, ESAC

MOS2CCD5 effect - Due to Charge Injection?

RAWY

~40

XMM-Newton

24

Michael Smith, ESAC

EPIC TTD#19-4: Test with VID increased to 25 V

VID=25V VID=25V

VID=20V VID=20V

Improvement or not?

XMM-Newton

25

Michael Smith, ESAC

EPIC TTD#19-4: Repeated test with VID increased to 25 V

VID=20V

VID=25V

Improvement or not?

Don’t know.

But it does not solve the problem!!

XMM-Newton

26

Michael Smith, ESAC

EPIC Telemetry Monitoring

XMM-Newton

27

Michael Smith, ESAC

EPIC Telemetry