Subject: JEM-X Monday Meeting 2005-11-28

Hi,
This time the meeting minutes are followed by the minutes from the
extra meeting last Wednesday

2005-11-28
Present: JC, NL, NJW

JEM-X status (NL): OK, some but not much hotspot activity.

Spectral extraction status (NL): The name of the new component is
        j_src_properties. Outputting of the PIF is a requested
        functionality.

Mosaic testing (JC): 3C273, SN1006 used for testing purposes. Also
        Galactic center is used. 5-10 and 10-20 keV energy bands.
        Source finding in mosaic images, 'sextract' will be tried.

Agenda for SDAST meeting:
      News from ISDC, ESAC
      Science results
      ADD work (JC has taken over from CAO)
      SVR work (NJW)
      JEMX observer's manual
      JEMX user's manual
      Source property extraction
      Mosaicking and source finding
      Soldi standard test (AN participation?)
      Person power
      Presence at ISDC
      Alignment and source position (catalog)
      The ARF related to efficiency as a function of gain

NOB

/NJW


2005-11-23
Present: SB, JC, CAO, NL, NJW

Revolutions with gain smoothing problems (CAO): 275 (charge depression, high 
background)
332 (gain depression of just one FRSS source, due to hot spot activity? or 
rather
sick anode)
Perhaps we must monitor the line position ratios between the calibration source.
This can be added to j_cor_gain. And it should operate on the smoothed values in 
order
not to be affected by the noise.

New template to extension to jemxi_aca_frss_index.fits with IT approved gain 
history.
CAO will send out an email with her proposal edited with the results of the 
discussion.

Gain changes across the detector and the ARF (NJW): Such changes have little 
effect
(lower than 3% below 5 keV and yet smaller above) and the calculated ARF used 
for
fitting gives no real change for the Crab spectra for revol. 170 (JMX1) when the
off axis angle >= 4 deg.

/NJW


----------
Niels J. Westergaard
Danish National Space Center
Juliane Maries Vej 30, DK 2100 Copenhagen O
Phone: +45 35325705; FAX:  +45 35362475