The p3d logo. a general data-reduction tool for fiber-fed integral-field spectrographs
About p3d







Authors & Thanks

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About p3d

p3d is a general data-reduction tool that is intended to be used with data of fiber-fed integral field spectrographs (IFSs). This tool can 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.

Version 2.2.6 was released 22.9.2014.


The aim with p3d is and has been to write a user-friendly tool that will reduce the time that is spent performing repetitive tasks in IFS data-reduction. p3d can combine several images (exposures) into one image, clean single images of cosmic-ray hits, can extract spectra using three different methods, does full error propagation through all steps, and provides graphical tools for inspection of both intermediate and final results. Release 2.2 of p3d contains tools to handle the following tasks:

p3d also provides graphical tools to inspect raw data and outcome of the different tasks. Flux calibration can be done both with the routines of p3d, or with, for example, IRAF (instructions on necessary steps in this case are available at the documentation WIKI).

Primary Reference
The primary reference regarding the functionality, the methods, and the implementation of p3d is:
"p3d: a general data-reduction tool for fiber-fed integral-field spectrographs", C. Sandin, T. Becker, M.M. Roth, J. Gerssen, A. Monreal-Ibero, P. Böhm, and P. Weilbacher 2010, Astronomy & Astrophysics, 515, pp.A35.

This is also the reference that should be used in publications that have made use of p3d for the data reduction. Additional references and links to those references are provided on the references page; please have a look at this page to see which other references you will want to cite.

Additional presentations of p3d

In October 2010, at the STScI-workshop "IFUs in the era of JWST", Christer Sandin gave a presentation with the title "Integral-Field Spectroscopy Data Reduction Made Easy with p3d". Please, follow this link and watch the presentation.

Software platform

p3d is written in the IDL language of EXELIS Visual Information Solutions. While p3d is licensed under GPLv3 and can be used freely with the help of provided tools, IDL is in itself a proprietary program.

Supported instruments

We refer to p3d as a general tool since it has been developed to work with any fiber-fed integral field unit (IFU) of any IFS. Currently the software has been configured and tested with the following instruments:

The future

A tool as complex as p3d is never finished. There are several parts of p3d, which could be extended and improved upon. Additional tools could be written in order to optimize the control and analysis of the outcome. p3d can also, if required, be configured for more instruments. If and how this will happen at large depends on the interest of the community. Please, tell us if there is some functionality missing, in your opinion, or if you need support for another instrument. We are scientists with limited resources, but we will do what we can to help you out. We do consider taking on people with a suitable expertise in our development team.

The p3d team
sixth version, for release 2.2: 13.12.2012
fifth version, for release 2.1.2: 23.4.2012
fourth version, for release 2.1: 24.11.2011
third version, for release 2.0: 20.6.2011
second version, for release 2.0a: 26.1.2011
first version: 4.2.2010

page last updated on: Thursday September 3, 2015 11:14:54; retrieved on: Monday November 30, 2015 15:07:54