Subject: JEM-X Monday Meeting 2007-06-25

Participants: SB, JC, NL, CAO, CBJ, NJW.

JEM-X status (SB): Nominal performance but hotspot activity in position
(140,30). At least in the period 2007-06-20 - 2007-06-24 (revolution
about 570) but possibly extending to before and after.

Previous ESAM condition has had no impact on the JEM-X performance.

SPI has made an annealing process in the beginning of June.

Time relation problems (SB): A problem with the updating of the INTEGRAL
orbit description has caused errors in the time relation calibration
file. A reprocessing of the calibration files will be initiated
and verified using Crab data.

Keywords in light curve and spectral files under OSA (SB): There are
inconsistencies in the conventions for naming of X-ray sources.
Other keywords are not updated properly. In the light curve files
the OGIP HDUCLASS etc. keywords are not given.
Division into LIGHTCURVE, SPECTRUM, and IMAGE. Under this there
should be a subdivision into counts, net-counts, background, etc.

JC will take a look at j_src_spectra and j_src_lc executables to see
if some of these peculiarities are relatively easy to amend.

Status of j_ima_iros (NL): Basic structure is now in place and SCREW 2001
has been written. The number of user defined should be kept low, because
the fitting procedure starts to diverge when trying to include more than
10 sources. Therefore a priority flag is defined with '3' for sources that
must be included and '1' for sources that should be investigated.
A careful update of the manual must be done.
A flag column in SRCL-RES will tell if the source is found by j_ima_iros
alone, specified by the user and not found, or specified by the user
and found.

Status of j_ima_cross (NJW): The coordinate system is now in place using the
ISDC misalignment matrices. The mapping for getting the collimator
correction using almost all Crab observation shows some deviations that must
be investigated one by one.

Sco X-1 observations (NL): What are the problems with the data?
The software trigger limit was set too low so that the GTI definitions
exclude a large part of the observations that with a change of
of the limit settings and a reprocessing can be done.
NL will make contacts.
A some point Sco X-1 counts contaminated the FRSS readings so that the
gain correction went wrong. CAO will check what steps have been taken.

X-ray burst analysis (JC, SB): Define a standard analysis for X-ray
bursters. Create a database of standard properties.

/NJW