... A new IRAF task has been developed that automatically identifies linear (line-like) features in an image or set of images. ... In order to automatically detect linear features, the first step is to select pixels in the image (Fig. 1 , left panel) that fall within a given data value range. ... Another aspect of extended linear features is that the image space pixels that describe them are in some way adjacent to one another and have a minimum and maximum length. ...

Еще в разделе: (Показать все результаты (>2004) - www.adass.org/ )

• Modern CCD Observations of Moving Celestial Objects: Algorithms and Software
• Robust Data Analysis Methods for Spectroscopy
• NICMOSlook and Calnic C: Slitless Spectra Extraction Tools

... These are: X14H0203T, X14H0204T, X14H0302T, X14H0303T, and X14H0304T. GEOMETRY OF THE PROBLEM In the five cases of interest, the observed GS motions are confined to the sub-dominant FGS resulting in a roll of the HST focal plane about the dominant Guide Star. ... Again, this is compatible with the explanation provided for X14H0203T. X14H0302T, X14H0303T, and X14H0304T At roughly 220 seconds into the observation X14H0302T, a disturbance resulted in a ~1.65" shift of the sub-dominant GS (see Fig. ...

Еще в разделе: (Показать все результаты (>17610) - www.stsci.edu/ )

• Photometric Analysis
• Discovery and Analysis of 21 ѕ®m Feature Sources in the Magellanic Clouds
• Target Identification

Next: Catalog Construction Up: Observations and Analysis Previous: Source Detections . ... It was assumed that the highest signal gives the most likely position of the source. ... Comparing the summed map with the maps from the individual energy ranges, the one which produced the smallest error box was chosen to represent the source position, as long as was greater than 4, a level chosen to reflect a reasonable degree of confidence in the detection. ...

Еще в разделе: (Показать все результаты (>2499) - www.sao.ru/ )

• A 10-GHz Radio Continuum Survey
• A 20 cm VLA survey of Abell clusters of galaxies
• Principal Components Analysis

Next: The STScI NICMOS Calibration Up: No Title Previous: CONICA: The high resolution . The STScI NICMOS Calibration Pipeline . Introduction . ... Dark Current Subtraction . ... Input Data . ... Scalar Background Subtraction . 2-D Background Subtraction . ... Status and Goals of the NICMOS Calibration Plan . ... Photometry . ... Photometric Performance of NICMOS . ... NICMOS Photometry. ... ST-ECF Grism Spectrum Software for NICMOS Grism Data . ... Analysis . ... STScI NICMOS Software . ...

Еще в разделе: (Показать все результаты (>273) - www.stecf.org/ )

• NICMOS/HST H-band (F160W) Images of the 30 Dor Starburst Cluster
• The STScI NICMOS Calibration Pipeline

Figure 1: An averaged OH 1612-MHz spectral profile of V1018 Sco, from 36 separate epochs of observations at Parkes. ... V1018 Sco (IRAS 17317-3331, OH354.88-0.54) is a well known OH/IR star with strong infrared and radio maser emission. The OH 1612-MHz maser spectrum of V1018 Sco, shown in Figure 1, has a double-peaked profile that is characteristic of asymptotic giant branch (AGB) stars where the maser emission occurs from the outer regions of an expanding circumstellar envelope. ...

Еще в разделе: (Показать все результаты (>19576) - www.atnf.csiro.au/ )

• Circinus_galaxy
• ATCA_mm_science
• News Results

... 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. ...

Еще в разделе: (Показать все результаты (>29949) - xmm.vilspa.esa.es/ )

• Change history
• Dark features

Joshua Tusin, Director of Public Relations for JYI , sent us the following description of the journal. ... Feature Editors . ... Inquire with the Director of Public Relations, Joshua Tusin, by e-mailing him at: tusin@jyi.org . The Journal of Young Investigators ( JYI , www.jyi.org) is an on-line science journal dedicated to publishing excellent undergraduate research papers and feature-type science articles covering all fields of science. ... Journal of Young Investigators (http://www.jyi.org) . ...

Еще в разделе: (Показать все результаты (>3943) - hea-www.harvard.edu/ )

• SAO RSDC Home Page - RRA - PSPC
• Source Selection
• The AstroStat Slog time series

... Laboratory and theoretical modelling of the UV bump on the interstellar extinction curve is a very popular topic in dusty investigations. ... feature is illustrated by Fig. 10 where the profiles were calculated using the model of graphite spheres. Figure 10: Normalized extinction efficiencies for graphite spheres. ... The lower panel shows the summary extinction of two graphite spheres with radii and (from upper panel) taken in equal proportions. ...

Еще в разделе: (Показать все результаты (>269) - www.astro.spbu.ru/ )

... Flux density at 1 GHz (/Jy): 2.5? ... Molonglo at 408 MHz (3': S=4.7 Jy) and Parkes 64-m at 5 GHz (4': S=1.3 Jy). ADS . ... VLA at 1.47 GHz (30''?43'': S=1.7?0.1 Jy). ... Whiteoak & Green 1996, A&AS, 118, 329. ... Parkes 64-m OH observations. ... 2001, ApJS, 134, 77. ASCA survey observations. ... ASCA observations. ... 2011, A&A, 531, A138. VLA and ATCA at 1.4 GHz (5".6?8''), ATCA at 5 GHz (10''?13'') and 8.4 GHz (5''?10''), plus XMM observations and H I from SGPS. ... 2011, ApJ, 742, 7. ...

Еще в разделе: (Показать все результаты (>2645) - www.mrao.cam.ac.uk/ )

• G116.5+1.1
• Sub-mm and radio observations of water maser sources
• Welcome Bojan Nikolic web pages (r. 329)

A press release on the Canadian Galactic Plane Survey was associated with this poster. ... Below are maps of HI emission, HISA, and 12 CO emission in the eastern 25% of the survey, given as projections along the velocity ( Figure 1 ) and latitude ( Figure 2 ) axes. ... 2000, A. J. , submitted . ... GIF | ... We are developing automated methods of locating HISA in velocity cubes by removing large-scale emission in space and velocity and flagging small-scale dark residuals. ...

Еще в разделе: (Показать все результаты (>6024) - www.naic.edu/ )

• Research Associate/Senior Research Associate in Radio Astronomy
• AO Spectral Line Position Search Database.
• HISA Poster for the 199th Meeting of the AAS, January, 2002

Next: Determination of atmospheric parameters Up: Optical spectrum of IRAS04296 Previous: Radial velocity of the . From comparison of observed and synthetic spectra of IRAS04296 we revealed some strong absorptional features whose positions coincide with known diffuse interstellar bands (DIBs) (Jenniskens et al., ... In Fig. 5 we illustrate the presence of DIB's by showing a spectral region of IRAS04296 . ...

Еще в разделе: (Показать все результаты (>1170) - jet.sao.ru/ )

• Bus Hound
• Results scientific researchs LRS
• NEdit.org

... Apache HTTP Server Version 2.4 . ... macro_module . ... These macros have parameters. ... macro definition within a <Macro> section, following the apache style. user defined names for the macro and its parameters. macro names are case-insensitive, like apache directives. macro parameter names are case sensitive. macro parameters must have distinct names. error on empty parameter names. redefining a macro generates a warning. macro definitions can be nested... (but what for?) . ... Use of a macro: . ...

Еще в разделе: (Показать все результаты (>7343) - www.arcetri.astro.it/ )

• Hubble Observations Shed New Light on Jupiter Collision
• The BD+40 region (Abstract)
• Procedures for Observations

Next: Identifications and Efficiency Up: THE DEEP X-RAY RADIO Previous: Source Classification . ... For some sources which did not have NVSS positions before the time of optical observations, arcsecond positions from the Texas survey (Douglas et al. 1996) and NED (typically based on VLA data) were used. ... All X-ray/radio sources without counterparts on the survey plates were imaged at either the KPNO 0.9m or the CTIO 0.9m telescopes. ... Previously Identified Sources . Sample Properties . ...

Еще в разделе: (Показать все результаты (>55916) - www.eso.org/ )

• The past, present and future appearances of the Refsdal supernova | ESO
• Identifications and Efficiency
• PAM Bulletin

... 2001 July 25 . Hot Gas Halo Detected Around Galaxy NGC 4631 . ... Explanation: Is our Milky Way Galaxy surrounded by a halo of hot gas? ... Since NGC 4631 is similar to the Milky Way , this observation indicates that our own Galaxy is indeed surrounded by a halo of hot X-ray emitting gas, although we are too close to clearly differentiate it from more nearby extended X-ray sources. The clusters of massive stars probably heat the halo gas. ... About APOD | ...

Еще в разделе: (Показать все результаты (>8096) - www.sai.msu.su/ )

• APOD: 2007 February 27 - Atmospheres Detected on Two Extrasolar Planets
• APOD: 2001 November 28 - Extra Solar Planetary Atmosphere Detected
• APOD: 2008 October 21 - A Dark Pulsar in CTA 1

... Observing . ... Solar Observing . ... April 3 (SUN) - Solar Observing, Central Park , Manhattan . ... APRIL'S SKY . ... Lecture Series at the American Museum of Natural History The Amateur Astronomers Association is proud to present an astronomy lecture series from October through May each year for our members and the .. ... The€аAmateur Astronomers Association of New York€аwas organized in 1927 to promote the study of Astronomy, emphasizing its cultural and inspirational value. ...

Еще в разделе: (Показать все результаты (>623) - www.aaa.org/ )

Next: Results & Discussion Up: Coronal Hole Diagnostics out Previous: Introduction . ... The dates of the observations discussed here, their locations, pointing, slit sizes and exposure times are given in BTDW. ... Line fits are given by the dotted line. ... An estimation of the errors in the derived parameters was obtained using the GA-derived parameters as an input for a ``classical'' IDL-CURVEFIT procedure (Peter, 1999; Peter & Judge, 1999). ...

Еще в разделе: (Показать все результаты (>3284) - star.arm.ac.uk/ )

• Armagh Observatory
• The Human Orrery
• Bright Point Studies

First results of X/S and X/Ka-band catalog combinations with full covariance information Andreas Iddink , Christopher Jacobs, Thomas Artz, Axel Nothnagel 22.09.2014 First results of S/X and X/Ka-band catalog combinations with full covariance information Andreas Iddink ­ 22.09.2014 Motivation Features of the ICRF2 ICRF2 (Defining- Sources ) 3414 ... Step: Import of the X/Ka catalog with full covariance information (Data provided by Christopher Jacobs et al. ...

Еще в разделе: (Показать все результаты (>331) - www.gao.spb.ru/ )

• http://www.gao.spb.ru/english/personal/malkin/publ/zm08g.pdf
• http://www.gao.spb.ru/english/as/j2014/presentations/filippova.pdf
• Pulkovo NEO Page: Estimation of Accuracy of the Observations

... X-Ray Structural Analysis . ... The course introduces the basic principles of diffraction analysis of crystal atomic structure and the basic concepts of state-of-the-art atomic crystallography. ... X-ray crystal diffraction. тАЬGeometricalтАЭ theory of diffraction by three-dimensional scattering center grating. ... Systematic X-ray reflection extinction related to Bravais lattice type, screw axis, glide-reflection planes. €аFourier synthesis as a method of crystal atomic structure analysis. ...

Еще в разделе: (Показать все результаты (>1040) - www.issp.ac.ru/ )

The close position of main satellite and subsatellite (distance between them about 1000 km) and using the similar sets of Faraday cups (VDP and VDP-S) with high resolution measurements (up to 16 Hz for the main satellite and up to 10 Hz for the subsatellite) allow us to determine the small-scale variations of the magnetopause shape and position and to estimate the velocity of the magnetopause motion. ... Two point observation of the magnetopause motion: the INTERBALL project. ...

Еще в разделе: (Показать все результаты (>1335) - www.cosmos.ru/ )

• Events on January 10-11, 1997 - INTERBALL observations
• Scientific Programme
• (S-6) Seeing the Sun in a New Light

... Tonight's Sky . ... Astronomy for Kids . ... Sky Guide . ... Precisely measuring velocity of a supernova shock wave . A research team has succeeded in measuring the expansion velocity of a shock wave of the supernova remnant W44. ... Illustration of propagation W44 shock waves in the molecular cloud. ... A research team led by Tomoro Sashida and Tomoharu Oka of Keio University in Tokyo, Japan, has succeeded in precisely measuring the expansion velocity of a shock wave of the supernova remnant W44. ...

Еще в разделе: (Показать все результаты (>6225) - www.astronomy.com/ )

• Has dark matter ever been detected in or around the Milky Way Galaxy? |
• Most intense burst ever detected | Astronomy.com
• Cassini makes measurements of Saturnт??s aurora and associated electric current