xy.to.radec: Pixel to RA/Dec

In AngusWright/LAMBDAR: Measure galaxy fluxes from an arbitrary FITS image using input aperture locations and dimensions

Pixel to RA/Dec

Description

Convert pixel locations to RA and Dec by using a calibrating pixel and known pixel widths, in the TAN Gnomonic coordinate system.

Usage

xy.to.radec(x, y, ra0 = 0, dec0 = 0,
x0 = 0, y0 = 0, xscale = 1, yscale = 1)

Arguments

x	numeric (n) vector; x-coordinates of pixels
y	numeric (n) vector; y-coordinates of pixels
ra0	numeric; RA of the calibrating pixel (deg)
dec0	numeric; Dec of the calibrating pixel (deg)
x0	numeric; x-coordinate of the calibrating pixel
y0	numeric; y-coordinate of the calibrating pixel
xscale	numeric; width of pixels in RA (deg)
yscale	numeric; height of pixels in Dec (deg)

Value

numeric (n,2) array; RA and Dec vectors (column bound) of the input x,y coordinates

Author(s)

Angus H Wright ICRAR [e-mail]

See Also

measure.fluxes

AngusWright/LAMBDAR documentation built on May 12, 2022, 1:49 a.m.