1. XMM Bruno Altieri -- SCI-SDX EPIC astrometry update EPIC CAL/OPS meeting Vilspa, 23-24 March 2003 B. Altieri

2. XMM-Newton 2 Bruno Altieri -- SCI-SDX MOS metrology & astrometry Goal: improve MOS relative astrometry –MOS metrology in LINCOORD CCF : relative CCD offsets How : cross-correlate EPIC source list with 2MASS (NIR) –2MASS astrometric accuracy < 0.2” Tune new BORESIGHT CCF (v17) for possible systematics in absolute astrometry and relative astrometry between EPICs.

3. XMM-Newton 3 Bruno Altieri -- SCI-SDX

4. XMM-Newton 4 Bruno Altieri -- SCI-SDX

5. XMM-Newton 5 Bruno Altieri -- SCI-SDX

6. XMM-Newton 6 Bruno Altieri -- SCI-SDX Systematic shift in MOS1 CCD6 MOS1 MOS2

7. XMM-Newton 7 Bruno Altieri -- SCI-SDX Hint of systemic astrometry residuals Global astrometry shift tends to be in same direction in S/C frame But statistics is poor (n obs =14) Hint of offset between MOS1 and MOS2 But correlation is not very good  thermal bending effect ? or reaching limit of measurement accuracy

8. XMM-Newton 8 Bruno Altieri -- SCI-SDX No residuals with old BORESIGHT CCF

9. XMM-Newton 9 Bruno Altieri -- SCI-SDX Astrometry: an old job ! Nebra sky disc: “The oldest concrete representation of the stars in the world” 2002, Nebra, Germany, 3600 yr old