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Specialist display functions for use with the Sloan Digital Sky Server.
sdssShowCutout( label, ra, dec, pixels )
- Displays a colour cutout image of a specified size from the
SDSS around a given sky position. The displayed image is square,
a given number of (0.4arcsec) pixels on each side.
- Parameters:
label
(String): label for display window
ra
(floating point): Right Ascension in degrees
dec
(floating point): Declination in degrees
pixels
(integer): size of displayed image in SDSS pixels
- Return value
- (String): short log message
sdssShowCutout( ra, dec, pixels, scale )
- Displays a colour cutout image of a specified size from the SDSS
around a given sky position with pixels of a given size.
Pixels are square, and their size on the sky is specified by
the
scale
argument. The displayed image has
pixels
pixels along each side.
- Parameters:
ra
(floating point): Right Ascension in degrees
dec
(floating point): Declination in degrees
pixels
(integer): size of displayed image in SDSS pixels
scale
(floating point): pixel size in arcseconds
- Return value
- (String): short log message
sdssShowCutout( ra, dec )
- Displays a colour cutout image of a default size from the SDSS
around a given sky position. The displayed image is 128 pixels
square - a pixel is 0.4arcsec.
- Parameters:
ra
(floating point): Right Ascension in degrees
dec
(floating point): Declination in degrees
- Return value
- (String): short log message
SDSS_DR2_BASE_URL
- Base URL for SkyServer JPEG retrieval service, DR2.
SDSS_BASE_URL
- Base URL for SkyServer JPEG retrieval service.
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TOPCAT - Tool for OPerations on Catalogues And Tables
Starlink User Note253
TOPCAT web page:
http://www.starlink.ac.uk/topcat/
Author email:
m.b.taylor@bristol.ac.uk
Mailing list:
topcat-user@jiscmail.ac.uk