1 SURF - SCUBA User Reduction Facility -update Expires: ????.??.?? This is the release V1.8-1 of SURF. The SCUBA User Reduction Facility (SURF) is a collection of applications for use in reducing mapping and photometry data from the Submillimetre Common-User Bolometer Array (SCUBA) at the James Clerk Maxwell Telescope. Support is provided for the following SCUBA observing modes: o JIGGLE/MAP (including map version of POINTING, FOCUS and ALIGN) o PHOTOM o SKYDIP [Raster and discrete] o SCAN/MAP [EmersonII and EKH] o NOISE *** *** In order to obtain the full functionality described in SUN/216 it *** is also necessary to install the Starlink PERL, PERLMODS and *** STARPERL packages from Starlink. See SUN/228 for more details on the *** STARPERL distribution. *** You may also want to install the associated ORAC-DR data reduction pipeline. See SUN/230. More information can be found in document SUN/216 (use `findme surf' or `showme sun216' on a Starlink system). A mailing list exists for discussing SCUBA data reduction techniques. The list is at scubadr@jach.hawaii.edu. To subscribe please send a message to majordomo@jach.hawaii.edu with an empty subject and containing the message 'subscribe scubadr ' 2 New_in_version_1_8 - Added a command, SKYDIP2, that can be used to fit skydip data that is purely sky temperature and airmass. This allows skydips to be fitted that were not observed with SCUBA but want to use the atmospheric model that is fitted in SURF. The command can be tested by using the output of the SKYDIP command (via the OUT parameter). 2 New_in_version_1_7 - Headers from input files are merged for the output maps from REBIN and related commands such that headers that differ between inputs are dropped but headers that are identical are retained. - The WEIGHTS and TIMES extensions now include world coordinate information. - Automatic Provenance tracking is now enabled (if enabled). See the AUTOPROV environment variable and PROVADD command. - Always write a DATE-OBS header in output maps from REBIN and always use ISO format. - Observatory location is now stored in output maps. - Fix segmentation fault in REMIP command 2 New_in_version_1_6_13 - CHANGE_POINTING command can now accept POLMAP observations. 2 New_in_version_1_6_12 - Brand new build system based on Gnu autoconf. 2 New_in_version_1_6_11 - Now includes a new version of the scunoise application. - A small error was found and fixed in the equation used by REMIP. Essentially the flux at all waveplate angles should have been reduced by a further small (constant) fraction determined by the level of instrumental polarization at the observing wavelength. The net result is that source polarizations will have been very slightly underestimated. For example, a source polarization of 1.00% at 850 microns should in fact have been 1.01% and a source polarization of 1.00% at 450 microns should have been 1.03%. This effect is smaller than measurement errors unless the source polarization exceeds ~ 10%. - Fix a bug preventing more than 173 maps to be combined in REBIN. The limit is now correctly set to 256 input maps. 2 New_in_version_1_6_10 - Fix problem in BOLREBIN on linux (unintialized pointer) - Fix REMIP problem with aborted polarimeter observations 2 New_in_version_1_6_9 - Fix problems with SCUBA2MEM when using SC (EKH) scanning - Correctly rebin photometry observations taken with AZ jiggling. [previously AZ offsets were simply ignored unless pointing corrections were being applied] 2 New_in_version_1_6_8 - New version of the Mapping Cookbook (SC/11) now includes scan mapping - Update remdbm to support KAPPA 0.18 - Use KAPPA libraries rather than private copies 2 New_in_version_1_6_7 - Bug fix release of v1.6 - Add support for Raster skydips - Minor fixes to SCUBA2MEM with EKH scanning - Don't calculate clock correction when using AZ 2 New_in_version_1_6 Important changes to SKYDIP and a fix for the clock error problem. 3 New_Tasks - SCUCLKERR can be used to determine possible clock errors in the acquisition system. 3 Changes_to_existing_tasks - Add correction for the SCUVAX clock error problem - Skydips now 'know' the correct value for ETA_TEL, T_COLD and T_HOT - In REMSKY the outer ring of bolometers can be specified using R-1 (ie it counts from the outside in if you use a negative ring number) - SCUOVER is now a little cleverer (and the text can be a different color to the circles) - SCUNOISE works on Windows NT. - If the second LST provided to REMSKY is less than the first LST it is now assumed that the time refers to the following day. 3 Bug_Fixes - Fixed error when SCUPHOT runs in the pipeline where occasionally the parabola fit of the complete coadd could give incorrect answers. - Can now combine data taken at almost the same wavelengths (a 20 micron difference is allowed) when using REBIN. - Output file from REMDBM now no longer contains CHOP_* keywords