Chandra X-Ray Observatory (CXC)

Generating PDF Science Justification Files

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If you use LaTeX for your PDF scientific justification, we suggest you create a PDF file in one of two ways.

1) Use a latex installation which allows you to create PDF files directly from the .tex file (e.g. pdftex). Some installations of pdftex do not allow you to include postscript figures. In this case you might use method (2).

2) Use ps2pdf (preferably version 1.4 or higher) to convert a postscript file to PDF.

latex file.tex
dvips -Ppdf -G0 -o file.ps file.dvi
ps2pdf14 file.ps file.pdf

We suggest one of these methods because most proposal reviewers will be reading your Scientific Justification on a computer screen, and many reviewers only have PDF (not PostScript) viewing capability. By default, a document produced with LaTeX uses so-called cm fonts, which differ significantly from any of the standard Type1 fonts built-in to PDF. PDF uses low-resolution bitmap images of these fonts to display the document. It prints well, but shows degraded resolution on the screen.

Errors with displaying DS9 figures

If you experience errors when displaying figures you produced with DS9:

Solution: Remake figure in DS9 and save as Postscript Level 1. In the Print window choose Level 1 under the Postscript heading. At this point you should re-LaTeX your SJ following the directions above.

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The Chandra X-Ray Center (CXC) is operated for NASA by the Smithsonian Astrophysical Observatory. 60 Garden Street, Cambridge, MA 02138 USA.   Email: cxcweb@head.cfa.harvard.edu Smithsonian Institution, Copyright © 1998-2012. All rights reserved.