Pedro Calderón/Guillermo Buenadicha SOC Operations Support Group Page 1 XMM-Newton Status of EPICs Operations Pedro Calderón Riaño Guillermo Buenadicha MALLORCA 05/11/2007

Pedro Calderón/Guillermo Buenadicha SOC Operations Support Group Page 2 XMM-Newton Contents Status of operations since Palermo Pedro Calderon Future activities and open points Guillermo Buenadicha

Pedro Calderón/Guillermo Buenadicha SOC Operations Support Group Page 3 XMM-Newton Overview Smooth operations, in general MOS2 +32 Volts line drop New hot stuff, 3X3, CCD6 check New MOS CCD thermal control Future procedure changes

Pedro Calderón/Guillermo Buenadicha SOC Operations Support Group Page 4 XMM-Newton Routine Operations RBI clock resync every ~194 days –Last on May 29 th, next on December 10 th Eclipse season fully nominal. –All performed automatically by timeline. A MOS-2 exp in Full Frame 2 Nodes mode –The exposure was erroneously planed. This mode is not commissioned. –A TC failed during the reconfiguration after the end of the exposure. The activity has a flaw at that point -> to be corrected.

Pedro Calderón/Guillermo Buenadicha SOC Operations Support Group Page 5 XMM-Newton MOS2 +32V drop The voltage in the +32V line drop instantaneously to 0 volts in the middle of a normal observation, the CCD stop generating events, and no other telemetry parameter showed any change or spike. After a switch OFF / switch ON the instrument returned to full nominal. Happened a similar incident in MOS-1 on 2002 (NCR#105), but never again. MRB with Saclay, Leicester and ESAC Suspected a SEU in EMVC electronic ??

Pedro Calderón/Guillermo Buenadicha SOC Operations Support Group Page 6 XMM-Newton New Hot Stuff New versions of the MOS Offset Tables –Now at version V12 New versions of the PN Bad Pixel Tables –Fixed the bright 64 column in CCD 11 Changes in place since Rev 1389 (July 11 th ) but they were not in full use until Rev 1408 (August 16 th )

Pedro Calderón/Guillermo Buenadicha SOC Operations Support Group Page 7 XMM-Newton MOS 3x3 pointed obs Mode tested on March 30 th Real observation performed in May 2 nd on PSR B (rev 1354, OBS_ID , ) Real observation performed in May 2 nd on PSR B (rev 1354, OBS_ID , routine calibration obs) Operations OK

Pedro Calderón/Guillermo Buenadicha SOC Operations Support Group Page 8 XMM-Newton New ED for CCD6 checks New ED now available Last check performed on October 29 th using the new ED The operation was quick and easy No changes in results (still full of AFFA hex events)!!!

Pedro Calderón/Guillermo Buenadicha SOC Operations Support Group Page 9 XMM-Newton CCD6 image

Pedro Calderón/Guillermo Buenadicha SOC Operations Support Group Page 10 XMM-Newton New MOS CDD thermal control Exist only 1 circuit (plus redundant) for the 3 cameras CCD substitution heaters. If heater are ON for one camera, they are ON for all. If a camera has problems, all cameras are heated => bad science The new idea : avoid heating the CCD of the cameras that are still working

Pedro Calderón/Guillermo Buenadicha SOC Operations Support Group Page 11 XMM-Newton New MOS CDD thermal control How to do that? Allowing the unpowered CCD to cold down to the minimum tested temperature (-140 degC). That is near to the external radiator temp, so a lot of time is needed. Then trigger heaters ON up to operational temperature, and switch OFF again Heaters will be ON for limited time, so the impact in the other cameras is reduced All this is done via manual procedure

Pedro Calderón/Guillermo Buenadicha SOC Operations Support Group Page 12 XMM-Newton New MOS CDD thermal control

Pedro Calderón/Guillermo Buenadicha SOC Operations Support Group Page 13 XMM-Newton Future actions Change of procedures to recover PN from Safe Standby Now PN never goes normally to SSB, but the procedure should be up to date any way The idea is switch off all PN, switch on the substitution heaters, and when all temperatures are good (remember the problem with the currents when the EPVC is cold, NCR#90), do a full switch on.

Pedro Calderón/Guillermo Buenadicha SOC Operations Support Group Page 14 XMM-Newton Future activities & open issues MOS redundant node readout MOS and PN, comparison of timing flux Rev 1325 Crab timing Periodic CCD-6 health check PN activities foreseen Slew survey S2K support

Pedro Calderón/Guillermo Buenadicha SOC Operations Support Group Page 15 XMM-Newton MOS redundant node readout Action pending since May 2006 The rationale is twofold: –Assess the capability to react against a HW failure in MOS (similar to RGS-2 case) –Gain expertise at ESAC building MOS sequences Sequences currently in DB? Too many… –All delivered sequences were kept since launch (and even since FM) –Naming convention has never been consistent –Not all of them used In Flight –However, there are some sequences capable of reverse clocking  tests in April 2005, MOS-1 CCD-6

Pedro Calderón/Guillermo Buenadicha SOC Operations Support Group Page 16 XMM-Newton MOS redundant node readout How to proceed? –When –It is a task not too urgent, but desirable to be done before T. Abbey runs away –If current DB sequences are able to do the job, then the design part is not an issue –Do we aim for Spring 2008? –Who –Ideally engineers at ESAC and T. Abbey + TBD replacement? –How –Either developing new sequences from scratch, or using the DB ones, followed by tests at the Spare and/or on the real unit. –Last step would be the creation of the DB items (ED’s) to cope with eventual node failure.

Pedro Calderón/Guillermo Buenadicha SOC Operations Support Group Page 17 XMM-Newton Timing events PN/M1/M2  Project started by M. Kirsch and John Olaffson (trainee at ESAC).  The idea is to analyze and compare the normalized flux in timing observations among EPIC cameras  Study is still ongoing, some preliminary cases required some support to understand deviations from a nominal ratio – –Cases in which MOS-1 deviates (above) from MOS-2 and PN (possible influence of MOS-1 hot column under weak sources) – –Cases in which both MOS deviate (below) from PN, all in counting. Analysis is required to assess influence of MOS CCD stuck mechanism and the SAS processing of GTI.  Screening of data is ongoing, also the Long Term Archive for HK analysis is being populated.

Pedro Calderón/Guillermo Buenadicha SOC Operations Support Group Page 18 XMM-Newton 1325 Crab timing… M. Kirsch reported a 600 microseconds absolute time deviation in the Crab observation in rev Nothing abnormal detected in ODF Timing files and no G/S problem found. A TCS generation problem after the given epoch was found at MOC due to old Orbit products. However, TCS vs. TCX analysis seems OK, shows TCX is independent on the MOC orbit file. Mission long TCS vs. TCX analysis is required just to find different behaviors among files. TCX is available and in use for timing observations through SAS.

Pedro Calderón/Guillermo Buenadicha SOC Operations Support Group Page 19 XMM-Newton Periodic CCD-6 health check Past operations –Tests in April 2005 after CCD failure –TTD in MPE May 2006 recommended periodic switch on –Done twice in 2007 (March and October) without success… Is it still worth it? –It is not really time consuming at MOC or SOC, since now is almost fully automatic. Can we link this activity to some periodic calibration or diagnostic for MOS? –Helps programming the activity regularly

Pedro Calderón/Guillermo Buenadicha SOC Operations Support Group Page 20 XMM-Newton PN activities foreseen Past non routine operations since Palermo –Minimal (not to say none!!!) Situation seems very stable for the instrument Any idea or suggestion to: –Improve operations? –Exercise operations under failure cases?

Pedro Calderón/Guillermo Buenadicha SOC Operations Support Group Page 21 XMM-Newton Slew survey, are we done through Past operations –Already reported by Pedro, real target in May. Future activities and open points –Offset maps required?  current ones are still theoretical –Calibration items?  What would be the calibration efforts and type of tests? –Others?

Pedro Calderón/Guillermo Buenadicha SOC Operations Support Group Page 22 XMM-Newton S2K in Spare support Support in the validation of the S2K once it is integrated in the Spare chain. Adaptation of DB items to spare (offsets, BP’s, clocks, voltage settings). Define a mirroring mechanism to upgrade Spare DB in line with future operational concepts.