... Posts tagged ?spatial statistics? ... As a part of exploring spatial distribution of particles/objects, not to approximate via Poisson process or Gaussian process (parametric), nor to impose hypotheses such as homogenous, isotropic, or uniform, various nonparametric methods somewhat dragged my attention for data exploration and preliminary analysis. ... I decide to discuss Kalman Filter a while ago for the slog after finding out that this popular methodology is rather underrepresented in astronomy. ...

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• The AstroStat Slog Blog Archive [ArXiv] 1st week, Oct. 2007
• The AstroStat Slog Globular Clusters
• The AstroStat Slog Blog Archive [MADS] Kalman Filter

... IC1805 . IC1805 - The "Heart" Nebula . ... The largest and very diffuse part of this image, IC1805, contains large and bright star cluster Melotte 15 at its center. ... This image is a tricolor narrowband image, taken with Ha, OIII, and SII filters. ... Ha: 12.5 hours of 30 minute subs . OIII: 9 hours of 30 minute subs . SII: 10.5 hours of 30 minute subs ...totalling 32 hours . ... Image registration . ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

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... ESO, the European Southern Observatory . ... ESO . ... Galaxy Clusters . ... Star Clusters . ... This image from the Wide Field Imager on the MPG/ESO 2.2-metre telescope at ESOтАЩs La Silla Observatory in Chile, shows the bright star cluster NGC 6520 and its neighbour, the strangely shaped dark cloud Barnard 86. This cosmic pair is set against millions of glowing stars from the brightest part of the Milky Way тАФ a region so dense with stars that barely any dark sky is seen across the picture. ...

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• Bright X-Ray Cluster Acts As Strong Gravitational Lens | ESO
• Wide-field view of the sky around the bright star cluster NGC 3532 | ESO
• Wide-field view of the sky around the bright star cluster IC 4651 | ESO

... Apache HTTP Server Version 2.2 . ... This document describes the use of filters in Apache. ... The Filter Chain is available in Apache 2.0 and higher, and enables applications to process incoming and outgoing data in a highly flexible and configurable manner, regardless of where the data comes from. ... A wider range of applications are implemented by third-party filter modules available from modules.apache.org and elsewhere. ... There are two ways to use filtering: Simple and Dynamic. ...

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• Cannibal Stars Cause Giant Explosions in Fornax Cluster Galaxy (ESO Press
• mod_sed - Apache HTTP Server
• Aldebaran Occultations

Astronotes Armagh Planetarium's Stellar Blog! ... Stars . ... Telescopes and Observatories . ... The majestic star-forming region in the Lagoon Nebula. The pale ring to the right is an internal reflection in the telescope.€а (Image credit: ESO/ VPHAS+/ V. Kalari and J. Vink (Armagh Observatory) . ... The 18 component images were further processed twice. ... Venu and his colleagues use images like this to identify individual young forming stars in the Lagoon Nebula and determine their ages. ...

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• Hubble shows us a spectacular star cluster | Astronotes
• Omega Centauri: globular cluster of 300,000 stars | Astronotes
• stars | Astronotes - Part 6

... HST . NICMOS Proposing Example - 3 . ... HST Peer Review Process . ... HST Overview . Overview . ... Phase I Proposing . ... Cycle 24 Announcement . Cycle 23 Results . ... Use of PATTERN-ORIENT. ... Questions Observing_Description: This is the observation of a cluster of bright red stars with NIC2 and the F165M, the F187N and the F237M filters. The proposers choose to avoid saturation of the brightest stars in the field, and select exposure times of 20 seconds in the F237M filter. ...

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• Simulation of a Distant Cluster of Normal Galaxies
• Comparisons of Implementations
• Surface Brightness Profiles

... NB The next 2 columns will only be present if the parameter usecat has been set to true . ... Source parameters such as count-rates, magnitudes and semi-major axes, are given in sub-tables-eg the column CORR_RATE is actually a vector column containing the values for each filter. ... QUALITY FLAGS Each source has an associated ``quality flag''. ... 0 1 Source lies above one or more bad pixels . ... QFLAG The quality flag for each source in each filter obtained from the input source-lists. ...

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• General Comments
• FILTER_EXTENDED_FLAG
• Comments

... The Hydra Cluster of Galaxies . ... Listed as Abell 1060, the Hydra Cluster contains well over 100 bright galaxies. ... All of the bright extended images in the above picture are galaxies in the Hydra Cluster with the exception of unrelated diffraction crosses centered on bright stars. ... In fact, the Hydra cluster is thought to be part of the Hydra-Centaurus Supercluster of galaxies . ... Publications with keywords: cluster of galaxies - Hydra . ... Abell 2218: A Galaxy Cluster Lens . ...

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• Астронет > The Hydra Cluster of Galaxies
• NGC 3293: A Bright Young Star Cluster
• NGC 3293: A Bright Young Open Cluster

... Next: Star Finding and Up: Image Restoration and Previous: Multiresolution and Astronomical . ... Design improvements continue to be made in the filter developed using mathematical morphology principles for the Infrared Astronomical Satellite ( IRAS ) images. The purpose of this filter is to eliminate Galactic cirrus emission from extragalactic fields. ... With an appropriate normalization, the filter curve was applied to each pixel in the image to remove the Galactic cirrus. ...

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• Automated Globular Cluster Photometry with DASHA

Radio data are displayed in the following format: . After the title with name of cluster under examination and with line about kind of data under one, e.g. Radio data [ optical data ] [ radio source identifications ] [ radio spectra (1.0 or 1.1) ] . ... The first line contains the number of radio sources associated with the cluster (these are just those sources with entries in sections 'Radio galaxy', 'Radio source' and 'Radio spectrum' below). ... Radio sources in cluster: 2 # . ...

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• CCD photometry
• A0690 radio identifications
• A1073 radio identifications

ARCSAT ID NUMBER: AS06 DESCRIPTIVE TITLE: Monitoring H-alpha Variability in Be Stars in Young Clusters PI: Steven Souza ( Williams College ) OBSERVER(S): Steven Souza UNCERTIFIED/UNTRAINED OBSERVERS: none presently planned COLLABORATORS: none CONTACT INFORMATION: Steven Souza ; ssouza@ ... As an early ARCSAT user I found that data obtained using SurveyCam and narrowband filters on loan to ARC from Williams College are compatible with those obtained at Williams. ...

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• http://www.apo.nmsu.edu/Telescopes/ARCSAT/ObsSchedules/arcsat_oct2014/AS10.html
• http://www.apo.nmsu.edu/Telescopes/ARCSAT/ObsSchedules/arcsat_may2015/AS08.html
• http://www.apo.nmsu.edu/Telescopes/ARCSAT/ObsSchedules/arcsat_may2014/AS05.html

This page is devoted to information on Supernova 1999gi in NGC 3184 . ... Information on the original web pages for many of these images can be found on the Supernova links web page. ... NGC 3184 is a fairly close Mag 10.3 galaxy, only about half as distant as the Virgo cluster. ... Seiichi Yoshida has a 1999gi page . Odd Trondal's 1999gi page . ... CfA image . ... 14.5 . ... Jean Marie Llapasset image . ... vsnet-alert 3805 ] SN 1999gi in NGC 3184 . vsnet-chat 2438 ] Host galaxy of SN1999gi . ...

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• Supernova 2000cz in IC 1535
• Supernova 1999cl in M88
• Supernova 2002bu in NGC 4242

... The Galactic low-mass X-ray binary GS 2023+338 was discovered during the burst on May 22, 1989 with the Japanise satellite Ginga (aka Galaxy). The flux reached 17 crabs (this unit of flux measurement is an bright X-ray source, Crab Nebula) at 10-35 keV. ... No other radio telescope worldwide carried out multi-frequency measurements. ... Upon 14 days the radio flux fell below the detection level at the RATAN-600 in relation to the decrease of the X-ray flux. ...

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... Tonight's Sky . ... Observing . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... solar system . galaxies . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... Imaging Basics . ... Observing Basics . ... Observing Basics: Visual Solar Filters . ... Expand your observing at Astronomy.com . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

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• Amateur astronomers image a rare glow | Astronomy.com
• Young, hot, and blue: stars in cluster NGC 2547 | Astronomy.com
• Maximize a minimum filter | Astronomy.com

... Australia Telescope Compact Array Radio Imaging of the Proplyd-like Objects in the Giant HII Region NGC 3603'' . M?cke, A., Koribalski, B.S. , Moffat, A.F.J., Corcoran, M.F., Stevens, I.R. 2002, ApJ 571, 366 . ... Brenneman, L., Corcoran, M.F., Moffat, A.F.J., Marchenko, S.V., Ptak, A., Skalkowski, G., Mushotzky, R., Stevens, I.R., Mueke, A., Koribalski, B.S. , et al. ... Physical Properties of visual counterparts to X-ray sources in the giant HII region NGC 3603'' . ...

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• HIPASS Bright Galaxy Catalog
• ATNF Daily Astronomy Picture
• Surface brightness measurements of extended galactic nebulae

Fig. ... Photograph of the Pleiades cluster by E. E. Barnard (1927) , courtesy of the Carnegie Institution of Washington. ... Top left: central cluster in red (POSS E) filter. Top right: central cluster in blue (POSS O) filter. ... Stars on the east side of the cluster generally exhibit E(B-V) ~ 0.03. ... Single underscores represent lower column densities of N (CH + ) ~ 5x10 12 cm -2 . ... Fields and pointings of thesis observations: The WISP field is indicated by the 5њ x 1.7њ diagonal box. ...

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• The Pleiades
• Notes on Low-Pass Filter Coefficients
• WISP Observations of the Pleiades in the Ultraviolet

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• APOD: August 23, 1996 - NGC 3293: A Bright Young Open Cluster
• APOD: March 29, 1998 - NGC 3293: A Bright Young Open Cluster
• APOD: 2001 September 9 - NGC 3293: A Bright Young Open Cluster

... In typical nightly use, the wide field and planetary telescope and cameras record images of favorably placed objects in the sky, including constellations, bright variable stars, nebulae through narrow-band filters, comets, the Moon, and planets. ... Shared Skies telescopes are available for use by students at the University of Louisville and the University of Southern Queensland, and by teachers and students in middle and high schools mentored by faculty at the universities. ...

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• Filters (ImageJ API)
• Projector (ImageJ API)
• Undo (ImageJ API)

... Обзор LPR фильтра. Впечатления от наблюдений с LPR фильтром. ... Характеристики цветных фильтров Baader-Planetarium . Мой перевод pdf- файла о фильтрах с сайта Baader-Planetarium (379 кб) . ...

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• Baader NEODYMIUM (Moon & Skyglow) filter

Title: A New Model of the Gravitational Lens 0957+561 and a Limit on the Hubble Constant . Authors: Norman A. Grogin , Ramesh Narayan (Harvard Univ.) ... Title: ROSAT/PSPC observation of the distant cluster CL0939+472 . ... Title: Interaction in the Bimodal Galaxy Cluster A3528 . ... Title: Cosmological Implications of Galaxy Cluster Evolution . ... Title: Galaxy Cluster Virial Masses and Omega . ... Matches 201 to 222 from a total of 222 matches for the search pattern galaxy cluster . ...

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• astro-ph authors/title/abstract search for 'galaxy merging' all years
• astro-ph authors/title/abstract search for 'galaxy environment' all years