ISOPHOT – Photometric calibration of point sources
نویسندگان
چکیده
منابع مشابه
Photometric Linearization under Near Point Light Sources
We present a method for generating linearized images that consist of only diffuse reflection from images taken under near point light sources. Previous photometric linearization method cannot work under near point light sources, since it assumes parallel light. For satisfying this assumption, our method utilizes a photometric linearization method by dividing images into small regions. It also s...
متن کاملAsteroids as far-infrared photometric standards for ISOPHOT
Asteroids are used as far-IR calibrators for the imaging photopolarimeter ISOPHOT on board the Infrared Space Observatory ISO. For the 10 selected objects we compiled a large uniform database1 of 678 individual observations, ranging from 7–2 000μm. Applying a new thermophysical model to the observations we derived thermal properties of the selected asteroids, based on spin-vector solutions, dir...
متن کاملPhotometric Mapping with ISOPHOT using the “P32” Astronomical Observation Template
The “P32” Astronomical Observation Template (AOT) provided a means to map large areas of sky (up to 45×45 arcmin) in the far-infrared (FIR) at high redundancy and with sampling close to the Nyquist limit using the ISOPHOT C100 (3×3) and C200 (2×2) detector arrays on board the Infrared Space Observatory (ISO). However, the transient response behaviour of the Ga:Ge detectors, if uncorrected, can ...
متن کاملNear Field Photometric Stereo with Point Light Sources
Shape recovery of an object based on shading variations resulting from different light sources has recently been reconsidered. Improvements have been made that allow for the photometric stereo approach to serve as a competitive alternative to other shape reconstruction methods. However, most photometric stereo methods tend to ignore factors that are relevant in practical applications. The setup...
متن کاملWFPC2 Photometric Calibration
The updated absolute photometric calibration for WFPC2 yields typical uncertainties for bright sources below 2% for the photometric filter set and of about 3% for other filters between 400 and 800 nm. We present a quantitative characterization of some well-known WFPC2 non-linearities, the CTE error and the long vs. short anomaly, which allows a better estimate of their possible impact under a v...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2002
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20011538