Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

sky2xy(1) [debian man page]

sky2xy(1)						      General Commands Manual							 sky2xy(1)

       sky2xy - Compute X Y from RA Dec using WCS in FITS and IRAF image files

       sky2xy [-vbjg] file.fts ra1 dec1 ... ran decn
       sky2xy [-vbjg] file.fts @listfile

       sky2xy  (pronounced sky-to-X-Y) is a utility for getting the image coordinates of a set of world coordinates in a FITS or IRAF image. World
       coordinate system (WCS) information in the image header describes, in a standard way, the relationship between sky  coordinates	and  image
       pixels. This information is used by the program to transform image right ascension and declination sky coordinate pairs to image coordinate
       (X,Y) pairs.  The program prints the coordinates at the same system as is given in the image header, but future versions will allow  trans-
       formations  to  B1950/FK4,  J2000/FK5,  ecliptic  or galactic coordinates. Input and output files in the Starbase format will eventually be

       -b     B1950 (FK4) input

       -e     Ecliptic longitude and latitude input

       -g     Galactic longitude and latitude input

       -j     J2000 (FK5) input

       -g     Galactic longitude and latitude input

       -v     More descriptive output

       -z     Use AIPS classic projections instead of WCSLIB

See Also

       Doug Mink, SAO (

6 July 2001							     WCSTools								 sky2xy(1)

Check Out this Related Man Page

imusa2(1)						      General Commands Manual							 imusa2(1)

       imusa2 - Find USNO-SA2.0 stars in FITS or IRAF image files

       imua2 [options] FITS or IRAF file(s)

       Search USNO-SA2.0 Catalog within the area described by the world coordinate system in an image header.  This is a link to imcat rather than
       a separate executable.

       -b [<RA> <Dec>]
	      Output in B1950, optional new image center in B1950 (FK4) RA and Dec

       -h     Print heading, else do not

       -j [<RA> <Dec>]
	      Output in J2000, optional new image center in J2000 (FK5) RA and Dec

       -m [<bright magnitude>] <faint magnitude>
	      Limiting catalog magnitude(s) (default none, bright -2 if only faint is given)

       -n <num>
	      Number of brightest stars to print

       -p <scale>
	      Initial plate scale in arcsec per pixel (default 0)

       -s     Sort by RA instead of flux

       -t     Tab table to standard output as well as file

       -u     USNO catalog single plate number to accept

       -v     Verbose listing of processing intermediate results

       -w     Write tab table output file -z Use AIPS classic projections instead of WCSLIB; use CD matrix or CDELT instead of poly-
	      nomial solution.

See Also

Web Page

       Doug Mink, SAO (

14 April 1998								WCS								 imusa2(1)
Man Page

13 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Adding the individual columns of a matrix.

I have a huge matrix file containing some 1.5 million rows and 6000 columns. The matrix looks something like this: 1 2 3 4 5 6 7 8 9 3 4 5 I want to add all the numbers in the columns of this matrix and display the result to my stdout. This means that the numbers in the first column are: ... (2 Replies)
Discussion started by: shoaibjameel123
2 Replies

2. Shell Programming and Scripting

awk or sed - Convert 2 lines to 1 line

Hi, Just trying to get to grips with sed and awk for some reporting for work and I need some assistance: I have a file that lists policy names on the first line and then on the second line whether the policy is active or not. Policy Name: Policy1 Active: yes Policy... (8 Replies)
Discussion started by: guinch
8 Replies

3. Shell Programming and Scripting

How can I do this in VI editor?

version info : vi availabe with RHEL 5.4 I have a text file with 10,000 lines. I want to copy lines from 5000th line to 7000th and redirect to a file. Any idea how I can do this? Note: The above scenario is just an example. In my actual requirement, the file has 14 million lines and I want... (9 Replies)
Discussion started by: kraljic
9 Replies

4. Fedora

Is UNIX an open source OS ?

Hi everyone, I know the following questions are noobish questions but I am asking them because I am confused about the basics of history behind UNIX and LINUX. Ok onto business, my questions are-: Was/Is UNIX ever an open source operating system ? If UNIX was... (21 Replies)
Discussion started by: sreyan32
21 Replies

5. What is on Your Mind?


Hello, I couldn't find an actual introduction thread, so I decided to just put this here. I go by d0wngrade online. I have been programming in multiple languages for about 15+ years. I started with standard web design languages like HTML and CSS, but I then advanced from design to development... (2 Replies)
Discussion started by: d0wngrade
2 Replies

6. UNIX for Advanced & Expert Users

Detecting unused variables...

Hi guys... The first active code line in is set -u . This causes a complete exit if a variable is used/found but has not been allocated at the start of the program. However, apart from writing code to do the task, is there a switch to to check which variables have been... (17 Replies)
Discussion started by: wisecracker
17 Replies

7. Shell Programming and Scripting

One instance of comparing grep and awk

Hi. In thread rovf and I had a mini-discussion on grep and awk. Here is a demo script that compares the awk and grep approaches for this single problem: #!/usr/bin/env bash # @(#) s2 Demonstrate group... (1 Reply)
Discussion started by: drl
1 Replies

8. Shell Programming and Scripting

Find columns in a file based on header and print to new file

Hello, I have to fish out some specific columns from a file based on the header value. I have the list of columns I need in a different file. I thought I could read in the list of headers I need, # file with header names of required columns in required order headers_file=$2 # read contents... (11 Replies)
Discussion started by: LMHmedchem
11 Replies

9. OS X (Apple)

Installing Dash Shell on OS X Lion

For those interested in installing dash shell on OSX Lion to help test POSIX compliancy of shell scripts, it is quite easy. I did it like this: If you don't have gcc on your system: 0. Download and install the Command Line Tools for Xcode package from Sign In - Apple * 1. Download the dash... (2 Replies)
Discussion started by: Scrutinizer
2 Replies

10. UNIX for Beginners Questions & Answers

Weird 'find' results

Hello and thanks in advance for any help anyone can offer me I'm trying to learn the find command and thought I was understanding it... Apparently I was wrong. I was doing compound searches and I started getting weird results with the -size test. I was trying to do a search on a 1G file owned by... (14 Replies)
Discussion started by: bodisha
14 Replies

11. UNIX for Beginners Questions & Answers

How to copy a column of multiple files and paste into new excel file (next to column)?

I have data of an excel files as given below, file1 org1_1 1 1 2.5 100 org1_2 1 2 5.5 98 org1_3 1 3 7.2 88 file2 org2_1 1 1 2.5 100 org2_2 1 2 5.5 56 org2_3 1 3 7.2 70 I have multiple excel files as above shown. I have to copy column 1, column 4 and paste into a new excel file as... (26 Replies)
Discussion started by: dineshkumarsrk
26 Replies

12. What is on Your Mind?

New UNIX and Linux History Sections

Dear All, Taking a break from Vue.js coding for the site, SEO and YT videos; and hopefully addressing some well deserved criticism from some here that I have been too focused on the visual aspects of the forums versus the substance and the community.... While the "current generation... (9 Replies)
Discussion started by: Neo
9 Replies

13. Programming

My first PERL incarnation... Audio Oscillograph

Hi all... Well guys and gals, I jumped in at the deep end and found things that PERL cannot do by default. Many tricky terminal escape codes are not catered for so I had to create workarounds. One thing I searched for was this: Passing perl variable to shell command AND, @Neo this was... (15 Replies)
Discussion started by: wisecracker
15 Replies

Featured Tech Videos