Subject: JEMX Monday Meeting 2005-01-24

Present: SB, CAO, JC, CBJ, NL, ILR, NJW

JEMX status: The week from 2005-01-16 to 2005-01-23 was dominated by
     high particle background resulting in switched-off instrument.
     Situation seems to return to more or less normal.
     
     JC: New dead anode (in JMX-1) at position 212 as of 2004-12-17
     
ISDC visit, CAO: Roland Walter mosaicking requires smaller pixels,
     better positions (CRPIX keywords) and immediate reading of flux.
     This should be fixed.
     
     Piotr Lubinski has found feature around 5 keV in REV 239 Crab
     spectra. Has this to do rejection criteria being a function of
     electronic signal? We must look into that.
     
     Stefan Larsson is down-grading his involvement in JEMX so the source
     extraction must be taken over by somebody else in the course
     of 2005.
     
     New misalignment matrix should be constructed. This is a JEMX team
     responsibility.
     
     JEMX should be represented at ISDC at least at a level of ~1 week
     per month.
     
     CAO has a list a ideas for SB's web page about JEMX for ISDC operators.
     
     Bruce O'Neel has made a comparison between revision 1 and revision 2
     data. In the latter there are some entries in the gain history table
     missing, but the smoothing function of the gain correction software
     irons this out.
     
ISWT, NL: The question of running both instruments came up. For strong
     sources this could be a disadvantage because the TM allocation will
     not be increased. The detection of weak sources will be improved.
     We have to make a technical note to evaluate the situation, also
     with respect to the anticipated life time of INTEGRAL.
     
ISDC Consortium, NL: Peter Kretschmar will be the JEM-X representative
     at ISOC. At a limited level he can also help out on JEM-X issues
     when visiting ISDC. Bruce O'Neel will be available for assistance
     with the integration of j_ima_iros and j_ima_mosaic for OSA5.
     
     Stéphane Paltani has returned as head of the science analysis team.
     
Workshop: X-ray bursts are best detected in JEM-X. IBAS should be upgraded
     with the JEM-X component and report about these.
     Pulse-phase spectroscopy seems to be too hard to do with JEM-X data.
     We should improve here.
     
/NJW
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Niels J. Westergaard
Danish National Space Center
Juliane Maries Vej 30, DK 2100 Copenhagen O
Phone: +45 35325705; FAX:  +45 35362475