The Restoration of HST Images and Spectra II Space Telescope Science Institute, 1994 R. J. Hanisch and R. L. White, eds. Evaluation of Image Restoration Algorithms Applied to HST Images I. C. Busko Space Telescope Science Institute, Baltimore, MD, and Astrophysics Division, INPE, S. J. dos Campos, Brazil. ... This work reports results on intercomparison of image restoration algorithms, when used in the speciоc context of stellar оelds imaged by the HST WFPC. ... Evaluation of Algorithms 281 Figure 1. ...

... The task first computes a background image in order to identify pixels that may be part of a source. The task uses two different algorithms for detecting ``point'' and ``extended'' sources. ... This is necessary because some faint ``point'' sources may have been missed by the point-source detection algorithm, but picked up by the extended-source detection algorithm. ... When the detection process is finished a check is made on extended sources to see if they can be split into two or more sources. ...

... This paper describes a simple technique that cancels the DC offsets often found in Hubble Space Telescope's calibrated NICMOS images. ... Hubble Space Telescope NICMOS images often show quadrants with a slight mismatch in DC offset levels after the calibration process. ... Figure 1: NICMOS image showing DC offsets between quadrants. ... Figure: Same image depicted in Fig. 1 after being processed by the DC offset removal algorithm. ...

Next: Background Correction Up: Reduction using Standard Previous: Order definition: Method . The parameter WIDTH2 is the width of the calibration lines. ... Now we can execute CALIBRATE/ECHELLE . ... CALIBRATE/ECHELLE DONE ! ... The user is prompted for the identification of two calibration lines on the image display, repeated in overlapped regions of adjacent orders. ... The wavelength calibration is wrong and apparently no identification error was made: There are too many lines per order. ...

T he Siding Spring Survey (SSS) is a Near-Earth Object search program that utilises the 0.5-m Uppsala Schmidt Telescope at Siding Spring Observatory, N.S.W., Australia. ... The mission of the Siding Spring Survey is to contribute to the inventory of near-earth objects (NEOs), or more specifically, the potentially hazardous asteroids (PHAs) and comets (PHOs) that may pose a threat of impact and thus harm to civilization. ... Based on the CSS Mission page . ... Siding Spring Survey Main Page . ...

... Posts tagged ?background? ... Probability density functions are another way of summarizing the consequences of assuming a Gaussian error distribution when the true distribution is Poisson. We can compute the posterior probability of the intensity of a source , when some number of counts are observed in a source region, and the background is estimated using counts observed in a different region. ... In both cases a background of 200 counts collected in an area 40x the source area is used. ...

Next: Summary Report Up: Phenology Garden Previous: Phenology Garden Contents . ... The creation of a phenology garden in Armagh, a project still in its infancy, is part of this effort. ... There is a need for such gardens to be close to meteorological stations having long time series of observations for calibration purposes, one of the Armagh Observatory's strengths in the environmental field. ... Armagh. ...

... Duchamp | ... Top | Duchamp is a solution to this problem of three-dimensional source finding. ... A list of the detections and their properties, as well as the input parameters that were used. [text file] . ... It can be downloaded in source format, in a gzipped tar archive. ... Changes from the previous version can be seen here (this file is included in the tar archive), while the archive files and documentation from the previous release versions are here , if you are really interested. ...

... Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Thesis Topic: Foreground emission and Cosmic Microwave background intrinsic anisotropies . ... Since its discovery the Cosmic Microwave Radiation (CMB) has been one of the pillars of modern Cosmology. ... Further development of this work is the application of already tested algorithms to disentangle the foreground emission from the CMB maps and the determination of the CMB intrinsic emission. ... Return to list of thesis topics ...

... Get used to using the mouse and its buttons for such tasks. Figure out the function of each of the three mouse buttons. ... Fire up textedit application and practice editing text files. ... Figure out basic options like cut and paste of text around the file, saving and loading files, searching for strings in the text and replacing strings. ... Familiarise yourself with other UNIX functions by creating various files of text etc. and trying out the various functions listed in handouts. ...

Frosted Leaf Orion . ... Credit Copyright: Masahiro Miyasaka Explanation: Sometimes, you can put some night sky in your art. Captured above Japan earlier this month, a picturesque night sky was photographed behind a picturesque frosted leaf. ... The particular background sky on this 48-second wide angle exposure , however, might appear quite interesting and familiar. ... Below and to the right of the meteor appears a longer and brighter streak of an airplane. ... NASA Official: Jay Norris. ...

... Bojan Nikolic web pages home . Next: Fitting of models of radio spectra --.. ... I describe an approach to fitting and comparison of radio spectra based . on Bayesian analysis and realised using a new implementation of the . ... used maximum-likelihood fitting of radio spectra by allowing objective . ... implementation details of the computer code. ... overall approach described here may also be useful for analysis of other . ... Copyright 2012, Bojan Nikolic feedback welcome ...

SiD Tracking using VXD Nick Sinev, University of Oregon Plan Motivation Track reconstruction algorithm Performance for single tracks Does it have any limits ? With backgrounds To do Motivation Tracking in SiD is a challenge, especially pattern recognition. ... Limitations caused by reconstruction speed consideration In the presence of high number of background hits, number of 3-point combinations used as track seed became enormous if we consider all combinations. ...

... The requirements contained in the current National Electrical Code and NFPA Standard for Electrical Requirements for Employee Workplaces apply to all electrical equipment, installations, and usage's at APO. ... do not use defective electrical equipment. ... the Site Safety Officer is to be notified of overloaded circuits in order to replace fuses and reset circuit breakers. ... the only multiple outlet adapter, other than extension cords, allowed are those have internal circuit breakers. ...

This diagram shows the six superimposed "layers" of the CSS table model. This diagram illustrates the algorithm for calculating a cell's final background. ... The diagram shows how, looking down on the six rectangles, one may compute the background color of each cell. ... A cell without a background color in the top layer is depicted as a "window" onto the lower layers, which give its final background color. ...

... 2011 March 21 . The CMB Cold Spot . ... Explanation: How could part of the early universe be so cold? ... This CMB Cold Spot, circled above on the WMAP 7-year all-sky map , has attracted attention as possibly being too large and too cold to be easily explained. ... Quite possibly, though, even a more mundane universe might be expected to show such a statistical peculiarity , and so explanations of the CMB Cold Spot like these might say more about human imagination than the early universe. ...

Main research interests: . 1) Structure and geometry of the circumnuclear medium of AGN, particularly through hard X-ray observations of obscured sources. ... 3) Physics of Ultraluminous Infrared Galaxies (ULIRGs): analysis of the AGN and starburst components through hard X-ray and infrared (with ground-based 3-5 micron spectroscopy, and with Spitzer in the 5-30 micron band) imaging and spectroscopy. ...

Automatic Detection of NEOs in CCD Frames . ... CCD frames obtained with modern telescopes with robotic operation allow carrying out standard observation programs for detection of peculiar objects on stellar backgrounds, as is the case of Near Earth Objects (NEOs). ... In this paper, we present original algorithms for automatically detecting dim NEO images in telescope frames, considering both sidereal and differential tracking [2]. ...

... The NATO "Science for Peace" Program , Project number SfP 973559 . ... Receiver devices based on superconducting Josephson junction dynamics provide easy and extremely sensitive way for measurements of contents of these molecules. ... Fast development of SQUIDs resulted in fabrication of number of devices for supersensitive physical experiments and production of sophisticated multichannel measurement systems used in medicine for magnetocardiography and neural investigations. ...

... A1910 Date Received: 2004-Feb-02 11:32:13 Technical Page Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Prop osal Title: ABSTRACT: Regular Astronomy Spectroscopy Extragalactic 15 Hours Probing the ISM and the Hi envelope around the Leo Triplet We prop ose to conduct sensitive measurement of p ossible absorption of a few background continuum sources by a variety of kinematically interesting Hi reservoirs in the NGC 3628 system. ... Part of the observing run...