caldb/data/asca/gis/bcf/bgd/sp_off
Unknown
The files in this directory, listed below, contain GIS background data (blank sky observations) taken during the early PV phase when the GIS Spread Discriminator was off. Warning: Note that the GIS background during this period is very different from the nominal, background when the Spread Discriminator is ON. These files therefore complement the current set of background datasets.
The naming scheme used is:
blanksky_g
_sp_off_
.evt
2
or 3
)
all
, indicating
no filtering on COR has been made, or has the form
cor
, where
4
, 6
, 8
, 10
, 12
,
14
, or can be missing)
4
, 6
, 8
, 10
, 12
,
14
)
Further information regarding the construction and use of these dataset can be obtained from the README file in the above directory.
Ken Ebisawa (NASA/GSFC ASCA GOF) 1994 Nov 16.
(No OGIP multi-mission standard)
See above, and the README file in the above directory.
S_DSCR='OFF'
in the event file primary header.
S_DSCR=ON
).
S_DSCR=ON
. The first
observation of this period is 80016000, 1993 June 14, Coma Cluster.
RTI
(Rise Time Invariance) column is filled, thus
particle background is efficiently removed with the gisclean
command in XSELECT
, which applies a PHA dependent RTI window
to the event lists.