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1.
Pixel Response Effects on CCD Camera Gain Calibration
(White Paper)
The gain of a CCD camera is the conversion between the
number of electrons ("e-") recorded by the CCD and the
number of digital units ("counts") contained in the CCD
image...
2.
Comparing Photometric
Measurements made with a Kodak KAF-0400 and KAF-0400-ABG
CCD (White Paper)
CCD's with anti-blooming gates can suppress the tendency for
bright point sources, such as stars, to "bleed" along
columns. However,...
3.
Combining Images using
Integer and Real Pixels (White Paper)
A common procedure used to increase the signal to noise
ratio ("S/N") of images is to combine them in software
by mathematically merging the pixel values of the
individual images...
4.
CCD Temperature Variations
and Dark Current Correction (White Paper)
An important step in CCD image calibration is the removal
of the thermal signature commonly known as "dark count".
An accurate measurement of the dark count in a CCD image
cannot be made from the image itself. To determine the
dark count...
5.
X-Ray Crystallography Research using
Mira for Data Visualization. (Tech Note)
The X-ray diffraction image in Figure 1 was sent by Dr.
Masanori Hidaka of Kyushu University in Japan. Dr.
Hidaka does CCD development which involves X-ray
crystallography. Doing 3-D visualization using Mira...
6.
Repairing a Streak Artifact in a Single Image (Tech Note)
This Tech Note describes a method for removing a streak
artifact from a single image. If we had 3 or more images
of the same field, the images could be registered and
then median combined to remove...
7. Amateur Astronomer Observes Exoplanet using Mira AP
In this news note, we describe how
amateur astronomer Ronald Bissinger
of Pleasanton, CA, detected the eclipse of HD 149026 during 3 nights
of observations beginning June 29, 2005. He used
Mira AP software to make
the critical...
8.
Precision
Astronomical Photometry using Large Image Sets (White
Paper)
Near Los Alamos, New Mexico, Dr. John Farrell studies variable stars using
Mira Pro 7 to do precision aperture photometry on large sets of CCD
images. Dr. Farrell is a physicist who wants to focus on
science rather than on...
9.
Centroiding Noise
and Precision Astronomical Photometry (White
Paper)
Centroiding noise is a random error, or "noise" component of a photometric measurement that results from placement of the measuring aperture on the object being measured. Centroiding
noise is not considered as part of the internal error
reported...
10.
Recovering an Image having an Irregular Background
(Tech Note)
Images with an irregular background can result from incomplete
correction of vignetting or background color variations.
A flat field correction is the first step to correcting
both effects...
11.
Removing Background Irregularities
from a CCD Image (Tech Note)
The flat field correction removes two types of artifacts in CCD images:
vignetting and other effects introduced into the image by the
optical path, and local effects such as sensitivity
variations as a function of position and wavelength of
light...
12.
FITS WCS Keywords
Recognized by
Mira Version 7 (Tech Note)
The FITS format
supports World Coordinate System ("WCS") calibrations that
relate column, row positions to standard coordinate
systems or physical dimensions. The FITS WCS is
supported by all Mira version 7 platforms. The FITS WCS
standard...
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