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Hubble Space Telescope
WFPC2 ETC Text Help

For help on specific item, click on item below, or on the ETC form.

Object
Stellar Spectrum
Magnitude
Spectral Type
Power Law
Flux
Freq./Wave.
Sp. Index
Emission Line
Line Flux
Line
Z/Vel.
Reddening (Color Excess)
Right Ascension
Declination
A/D Gain
Object Location on CCD Pixel
Filter:
LRF Filter Central Wavelength
Exposure
Signal to Noise
Exposure Time