event2image.py: Update keyword "DETNAM" of the created image

The "DETNAM" keyword of the created image is updated to show the
actually available chips.  Therefore, there won't be issues when this
image is corrected for exposure by dividing the exposure map.
And the exposure-corrected image will have correct "DETNAM" value
instead of "Merged".

1 files changed, 4 insertions, 0 deletions

diff --git a/bin/event2image.py b/bin/event2image.py
index 44189e0..66fdf91 100755
--- a/bin/event2image.py
+++ b/bin/event2image.py
@@ -17,6 +17,7 @@ from _context import acispy
 from acispy.manifest import get_manifest
 from acispy.pfiles import setup_pfiles
 from acispy.acis import ACIS
+from acispy.header import write_keyword
 
 
 def make_image(infile, outfile, chips, erange, fov, clobber=False):
@@ -95,6 +96,9 @@ def main():
         print("erange:", erange, file=sys.stderr)
 
     make_image(infile, outfile, chips, erange, fov, args.clobber)
+    chips_all = ACIS.get_chips_str(infile)
+    write_keyword(outfile, keyword="DETNAM",
+                  value="ACIS-{0}".format(chips_all))
 
     # Add created image to manifest
     key = "img_e{erange}".format(erange=erange)