There is a new spectral format, equispec, which is useful for the common case in which all spectra in a multispec image have the same linear dispersion relation (be aware that spectra of this type are not compatible with earlier IRAF versions). The digiphot packages have been redone, and daophot now uses Stetson's DAOPHOT II algorithms. The line fitting algorithms in splot and fitprofs now provide error estimates. The cosmicrays task can now interact with the display device to allow users to select cosmic rays visually. A powerful new task (imexpr) allows far more sophisticated image expressions than are possible with imarith. Other new tasks include one to register images with cross-correlation (xregister), tasks to convert text files to / from spectra (rspectext, wspectext), and tasks to measure radial velocities from spectral lines (rvidlines, rvreidlines). See accompanying articles in this Newsletter for further details about many of these new tasks.
The following tasks are new (or resurrected or renamed) in V2.10.3BETA:
imexpr (images) - Evaluate a general image expression xregister (images) - Register 1-D or 2-D images using x-correlation techniques surfit (utilities) - Fit a surface, z=f(x,y), to a set of x, y, z points asthedit (astutil) - Astronomical header editor keywpars (astutil) - Translate the image header keywords used in astutil package (pset) daoedit (daophot) - Review/edit algorithm parameters interactively findpars (daophot) - Edit the star detection parameters (pset) setimpars (daophot) - Save/restore parameter sets for a particular image pcalc (daophot) - Do arithmetic operations on a list of daophot databases pconcat (daophot) - Concatenate a list of daophot databases (was pappend) pfmerge (daophot) - Merge a list of photometry databases pstselect (daophot) - Select candidate psf stars based on proximity mkapfile (photcal) - Prepare aperture corrections file from apphot/daophot output mkphotcors (photcal) - Prepare the photometric corrections files apfile (photcal) - Prepare an aperture corrections file from a text file pconcat (ptools) - Concatenate a list of daophot databases (was pappend) pcalc (ptools) - Do arithmetic operations on a list of daophot databases tbconcat (ptools) - Concatenate a list of apphot/daophot tables databases (was tbappend) tbcalc (ptools) - Do arithmetic on a list of apphot/daophot tables databases txconcat (ptools) - Concatenate a list of apphot/daophot text databases (was txappend) txcalc (ptools) - Do arithmetic on a list of apphot/daophot text databases disptrans (onedspec) - Transform dispersion units and apply air correction rspectext (onedspec) - Convert ascii text spectra to image spectra sbands (onedspec) - Bandpass spectrophotometry of spectra sflip (onedspec) - Flip data and/or dispersion coordinates in spectra specshift (onedspec) - Shift spectral dispersion coordinate systems wspectext (onedspec) - Convert 1D image spectra to ascii text spectra rvidlines (rv) - Measure radial velocities from spectral lines rvreidlines (rv) - Reidentify spectral lines and measure radial velocities apnoise (apextract) - Compute and examine noise characteristics of spectra
Dave Bell
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