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Data reduction and analysis

3C445 was observed with ASCA on 1995 June 1 for a total of 45 ksec. For a description of the ASCA experiment, see Tanaka, Inoue, & Holt (1994). The Solid-State Imaging Spectrometers (SIS0 and SIS1) operated in 1-CCD FAINT mode, and the Gas Imaging Spectrometers (GIS2 and GIS3) were used in Pulse-Height mode. The SIS data were converted into BRIGHT2 mode applying dark frame and echo corrections (see ``The ASCA Data Reduction Guide'', v.2, April 1997).

The data were reduced by applying a number of standard screening criteria. For both SIS and GIS we rejected the data accumulated during passage of the South Atlantic Anomaly, in intervals of Bright Earth, angular deviation, and elevation angles lower than 20, 0.01, and 10 degrees, respectively, and when the geomagnetic rigidity was lower than 6 GeV/c. Only grades 2, 3, and 4 were retained for the analysis. The effective exposures and corresponding source count rates after screening are reported in Table 1. The source is detected with a moderate signal-to-noise ratio, tex2html_wrap_inline356 28-40.





Scott Koch
Fri Nov 14 14:50:41 EST 1997