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Mirametrics Articles
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Pixel Response Effects On CCD Camera Gain Calibration
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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...
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Amateur Astronomer Detects Exoplanet using Mira AP
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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...
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Precision Astronomical Photometry using Large Image Sets
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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...
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Photometric Measurements Between Kodak KAF-0400
& KAF-0400-ABG CCD
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White Paper: CCD's with anti-blooming gates can suppress the tendency
for bright point sources, such as stars, to "bleed" along columns. However,...
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Combining Images Using Integer And Real Type Pixels
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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...
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Repairing a Streak Artifact in a Single Image
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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...
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CCD Temperature Variability And Dark Current Correction
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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...
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Centroid Noise And Precision Astronomical Photometry
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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...
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Recovering An Image Having An Irregular Background
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Images with an irregular background can result from incomplete correction of
vignetting or background colour variations. A flat field correction is the
first step to correcting both effects...
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Removing Background Irregularities From A CCD Image
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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...
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FITS WCS Keywords Recognized By Mira Version 7
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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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X-Ray Crystallography Research Using Mira For Data Visualization
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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...
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