p3d for Linux, Mac OS X 2.2.4.1 freeware

... be useful for people who have access to astronomical data of such an instrument. Data-reduction tasks, which are performed by p3d, convert raw data of CCD detectors into extracted spectra that can thereafter be used for scientific purposes. ...

Author Christer Sandin
Released 2013-06-21
Filesize 10 kB
Downloads 560
OS Linux, Mac OS X
Installation Instal And Uninstall
Keywords field spectrograph, data reduction, astronomical data, reduction, reduce, spectrograph
Users' rating
(10 rating)
p3d for Linux, Mac OS XCADLinux, Mac OS X
p3d for Linux, Mac OS X - astronomical image Freeware Download Notice

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p3d for Linux, Mac OS X freeware - The Latest User Reviews
p3d for Linux, Mac OS X freeware - The Latest Versions History
2.2.4.1 Jun 21, 2013 New Release All tools that combine raw-data images:
· Major bug fix - When I optimized the C routine of the image combination routine I introduced a serious bug. This bug is present in revisions 2753-2779 of p3d_cimcom.c, and is fixed with revision >=2780

C routines:
· Optimization - Optimized the C routines p3d_cpixex.c and p3d_cmpd.c
2.1.1 Rev161 Feb 7, 2012 New Release Combining multiple files with extracted data (p3d_cexposure):
· New functionality.
· Added a new tool that combines mutliple extracted exposures that are
· taken illuminating the exact same field on the sky. The supplied data
· are at first checked for consistency in image size and equal values on
· the wavelength calibration parameters CRVAL and CDELT. Thereafter the
· files are either averaged, weighting with the exposure time of the
· individual exposures. Alternatively, setting the /SATURATED keyword it
· is expected that all files have a different exposure time. In this case
· the longest exposure is used as reference. Portions of individual
· spectra, where a mask indicates that a pixel was saturated, are then
· replaced with scaled data of the same spectrum and portion of a file
· using a shorter exposure time. The routine accepts any number of files.
· The routine produces one output file with merged data, and a file with
2.1 Rev1529 Jan 18, 2012 New Release Correction for differential atmospheric refraction (p3d_darc):
· Added a new tool that corrects extracted science images for differential
· atmospheric refraction. The new tool works out-of-the-box with all the
· IFUs that use square-shaped spatial elements (VIMOS, FLAMES, PMAS/Larr,
· MPFS, and SPIRAL). In some cases the required physical properties are
· unavailable in the data header. In that case they must be entered by
· hand.
· The routine allows the user to choose between three implemented
· approaches to calculate the offsets. The results of all three approaches
· are collected in a plot, which allows the user to choose the most
· accurate method as he or she believes is more correct.
· The offsets are calculated using the wavelength-dependent
· refractive-index equation of Ciddor (1996; as well as Edlén 1966).
· A second approach uses a height-integrating approach to calculate the
· refractive-index that comes from the Starlink project. The routine

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