s#bgd_#.evt

caldb/data/asca/sis/bcf/bgd/94apr

Unknown

These files contain events from 3 deep field observations without any obvious sources and with a total exposure of about 120 ks. The events were cleaned using the select mkf command in XSELECT (with ELV_MIN greater than 20 and SAA = 0). Hot and flickering pixels were removed using the sisclean command in XSELECT (sisclean method 2, with cell size 5, log probability -5.24, background level 3). Finally, any spurious events which remained were removed by manual cleaning based on the light curve (i.e. excluding spikes and drop- outs).

The naming scheme used is:

s$i$_$xxx$.evt

where

• $i$ is the SIS sensor ($i$=0 or 1)
• $xxx$ is a character string denoting which value was used as the lowere limit of the magnetic cut-off rigidity (COR) during the construction of the dataset. ($xxx$ = 06, 08, 10, 12, 14, or all)

Further information regarding the construction and use of these dataset can be obtained from the README file in the above directory.

Koji Mukai (NASA/GSFC ASCA GOF) 1994 Jul 14.

(No OGIP multi-mission standard)

See above, and the README file in the above directory.

• Koji Mukai (ASCA GOF NASA/GSFC) 1994 Jul 14:
  • In order to prevent the extraction of astrophysical information, the files have a spurious pointing direction of RA=0, DEC=0. This means that X = DETX and Y=DETY. TIME is set to DBLE(PHA) and the events are sorted in ascending order ofDETX