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Bright / extended DIMM configuration

The simpler method is to make a map from all of the data at once using dimmconfig_bright_extended.lis:

% makemap "$STARLINK_DIR/share/smurf/s8d20100216_00022_0002[23].sdf" Orion \
method=iterate config=^$STARLINK_DIR/share/smurf/dimmconfig_bright_extended.lis

The large-scale noise and negative bowling is compensated for using a S/N-based zero mask during map-making. Everywhere the signal is below this threshold (5-$\sigma$ by default), the map is set to zero for all but the final iteration. The resulting map, and the location of the iteratively-determined zero mask are shown in Fig. [*].

Figure: Top: Map using all of the same data as in Fig. [*], but processed simultaneously using a single call to makemap with the specialized dimmconfig_bright_extended.lis. Bottom: The QUALITY component of the resulting map indicates (white) where the map has been constrained to zero after all but the final iteration. It is selected based on a S/N threshold.
\includegraphics[width=\linewidth]{sc19_map22+23_brightextended} \includegraphics[width=\linewidth]{sc19_map22+23_brightextended_mask}



next up previous 585
Next: Cheat sheet for checking data quality
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The SMURF SCUBA-2 Data Reduction Cookbook
Starlink Cookbook 19
Edward Chapin, Jessica Dempsey, Tim Jenness, Douglas Scott, Holly Thomas & Remo Tilanus
3 August 2010
E-mail:ussc@star.rl.ac.uk

Copyright © 2009-2010 University of British Columbia \ Copyright © 2009-2010 Science \& Technology Facilities Council