... Posts tagged ?parameter estimation? ... Leccardi & Molendi (2007) have a paper in A&A ( astro-ph/0705.4199 ) discussing the biases in parameter estimation when spectral fitting is confronted with low counts data. Not surprisingly, they find that the bias is higher for lower counts, for standard chisq compared to C-stat, for grouped data compared to ungrouped. ... Tags: bias , C-stat , chi-square , chisq , Cstat , Fitting , parameter estimation , Peter Freeman , spectra . ... 1 Comment . ...

Еще в разделе: (Показать все результаты (>3867) - hea-www.harvard.edu/ )

• The AstroStat Slog Blog Archive [Quote] When all the models are wrong
• The AstroStat Slog Peter Freeman
• The AstroStat Slog spectra

The AstroGuide . ... AstroGuide | ... AstroGuide Listing . ... See many more Astronomy Listings by: Category or Alphabet . Directory of astronomy web sites. ... Listed Since October 25, 2004 . ... Web Site . http://123world.com/astronomy/index.html . ... Web . www.astronomy.net . ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . are trademarks of John Huggins ...

Еще в разделе: (Показать все результаты (>2268) - www.astronomy.net/ )

• Telescope Review Web Site, AstroGuide Listing
• Telescope Warehouse, AstroGuide Listing

... Purpose: To measure changes to the properties of the data when the spectra are moved over a range of cross-dispersion and dispersion positions. Description: This program will obtain COS FUV spectra of external targets at a range of cross-dispersion and dispersion positions in order to evaluate the optical performance of the spectrograph at different lifetime positions. ... Link to Cycle 17 Science # Use the GO + GTO Phase 1 exposure listing and derived statistics # posted on WWW. ...

Еще в разделе: (Показать все результаты (>20045) - www.stsci.edu/ )

• Terrestrial Silicates Compared to Astronomical Silicates

... 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. ...

Еще в разделе: (Показать все результаты (>10003) - xmm.vilspa.esa.es/ )

• Comments

... Submitted by Paul Benni on 11/27/2013 18:38:14 . Comet C/2013 R1 Lovejoy (November 8) . Morning image (Nov. 8) of Comet Lovejoy. ... C8 EdgeHD SCT with Hyperstar (f/2.1) and ST-8300C ccd. Image is uncropped from the Hyperstar setup. Compare to my Comet ISON image with the same image scaling. Interesting how much brighter and larger Comet Lovejoy is now compared to ISON. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

Еще в разделе: (Показать все результаты (>1919) - www.atmob.org/ )

... User Guide ] Task: mbspect Purpose: Make spectrum and measure velocities from a Miriad image. ... MBSPECT makes a spectrum of the velocity or frequency axis of a Miriad image. ... No default. ... Spectral units are always in the same units as the input file (even if a conversion is performed for the plot and/or log file). ... A second value will overwrite the default label for this axis. ... Key: order Order of optional robust (clipped polynomial) fit (0-10) to be applied to the spectral axis. ...

Еще в разделе: (Показать все результаты (>17918) - www.atnf.csiro.au/ )

• imcmp
• mfboot
• lbaops:lbafeb2009:vx014b [ATNF VLBI Wiki]

. Comment on J1842+7946 . Comparing the brightnesses of the two main features seen in our 5 GHz image with higher frequency VLBI images available in the literature (at 8.4 GHz from the USNO database and at 15 GHz by Kellermann et al. (1998)), one can conclude that the NW component has a steeper spectrum since the SE one becomes relatively stronger as the observing frequency increases. VLBApls home page . Last modified: 16 Oct 2000

Еще в разделе: (Показать все результаты (>181) - www.vsop.isas.ac.jp/ )

Proposal Identification No.: A2004 Date Received: 2004 -Sep-30 12:45:57 Technical Page Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Prop osal Title: ABSTRACT: Commensal Astronomy Spectroscopy Galactic 28 Hours An Initial HI Survey of the Taurus Region We propose to carry out a high spectral resolution survey of a 60 square degree region of the Taurus Molecular Cloud. ... X Part of the observing run. ...

Еще в разделе: (Показать все результаты (>4830) - www.naic.edu/ )

• http://www.naic.edu/vscience/schedule/tpfiles/GoldsmithtagA2004tp.ps
• http://www.naic.edu/vscience/schedule/tpfiles/OlmitagA1762tp.ps
• compare dlpf shapes

... ИСТИНА (http://istina NULL .msu NULL .ru/) . Scopus (http://www NULL .scopus NULL .com/search/form NULL .url) . ... Posted in Uncategorized | No Comments ? ... http://club NULL .foto NULL .ru/gallery/images/photo/2012/03/22/1947272 NULL .jpg) . ... Добавлена страничка со списком публикаций сотрудников лаборатории за 2012 год. ... Панорама поверхности Марса (http://panoramas NULL .dk/mars/greeley-haven NULL .html) . ... Лаборатория лазерной интерферометрии is proudly powered by WordPress . ...

Еще в разделе: (Показать все результаты (>46) - geo.sai.msu.ru/ )

• Лаборатория лазерной интерферометрии
• site Лаборатория лазерной интерферометрии
• January 2012 Лаборатория лазерной интерферометрии

... Science User Portal . ... ESO, the European Southern Observatory . ... Travel and Contacts . Travel to ESO Headquarters . ... Travel to E-ELT Armazones . ... Green ESO . ... Survey Telescopes . ... Star Clusters . ... Stars@ESO . ... ESO Science Newsletter . ... ESO 3.6-metre telescope . ... MPG/ESO 2.2-metre telescope . ... These publication statistics give an idea of how much scientific work gets done with data from the individual observatories, but does not address the impact of this science. ...

Еще в разделе: (Показать все результаты (>46462) - www.eso.org/ )

• Illustration the advantage of the Ultra HD format for video compared to other
• Snow line distance compared to the Solar System | ESO
• ArtistтАЩs impression comparing the disc of material around SDSS J1228+1040 and

... Gravitational wave search provides insights into galaxy evolution and mergers . ... galaxies . ... Globular cluster NGC 2808, elliptical galaxy NGC 2986, and the Sextans Dwarf . ... Open cluster NGC 2818, spiral galaxy NGC 2964, and spiral galaxy NGC 2976 . ... What are typical star-to-star distances in globular clusters compared to stellar distances in our region of the galaxy? ... RELATED TOPICS: GLOBULAR CLUSTERS . ... Get instant access to subscriber content on Astronomy.com! ...

Еще в разделе: (Показать все результаты (>5694) - www.astronomy.com/ )

• Short-GRB riddle answered | Astronomy.com
• Watch the LIGO announcement live | Astronomy.com
• The farthest supernova yet for measuring cosmic history | Astronomy.com

... Apache HTTP Server Version 2.2 . ... Authorization based on file ownership . ... This module authorizes access to files by comparing the userid used for HTTP authentication (the web userid) with the file-system owner or group of the requested file. ... file-owner . ... The name of the system group that owns the file must be present in a group database, which is provided, for example, by mod_authz_groupfile or mod_authz_dbm , and the web-username must be a member of that group. ... Require file-group...

Еще в разделе: (Показать все результаты (>8666) - www.arcetri.astro.it/ )

• CHIANTI atomic database
• mod_file_cache - Apache HTTP Server
• FIRPO Help 1

... Mass . 17a. Measuring Mass . ... A medium-size (1.25 inch wide) binder clip, as is used in offices to hold papers together--the type made of flat blue steel, with two wire handles. ... The theory predicts that the oscillation period should be proportional to the square root of the oscillating mass, including the mass of the clip. Note that gravity plays no part here: the oscillation period would be the same on the Moon or in zero-g. Denoting square root by SQRT, we have . ...

Еще в разделе: (Показать все результаты (>1315) - www.cosmos.ru/ )

• The Discovery of Atoms and Nuclei
• From Stargazers to Starships

Once students get the hang of it, they can find and measure the brightness of Delta Cephei in a few minutes. ... of Delta Cephei . ... Oct. ... The following table lists the measurements of Delta Cephei made by one amateur astronomer in autumn 1990. ... 4.0 . ... This activity is a simplified version of one that appeared in Hands-On Astrophysics, a series of activities prepared by the American Association of Variable Star Observers with support from the National Science Foundation. << previous page | ...

Еще в разделе: (Показать все результаты (>868) - www.astrosociety.org/ )

• ASP: Education Newswire

Contents] [Previous] [Next] [Alphabetical Tag List] [Index] . List of Categories and HTML Tags"> . HTML . ... INPUT . INPUT TYPE="BUTTON" . INPUT TYPE="CHECKBOX" . INPUT TYPE="FILE" . INPUT TYPE="HIDDEN" . INPUT TYPE="IMAGE" . INPUT TYPE="PASSWORD" . INPUT TYPE="RADIO" . INPUT TYPE="RESET" . INPUT TYPE="SUBMIT" . INPUT TYPE="TEXT" . ... OBJECT Formatting Tags . ... CENTER . ...

Еще в разделе: (Показать все результаты (>2335) - www.sao.ru/ )

• Software Modifications
• ESO-MIDAS Problem report Form
• Comment field

.

Еще в разделе: (Показать все результаты (>299) - zebu.uoregon.edu/ )

• CCDs for Material Scientists
• Astronomy HyperText Book: Interstellar Medium
• Evidence for Dark Matter

... Our Galaxy . ... Stars . ... Image credit: ESO, Acknowledgement: VST/Omegacam Local Group Survey) . First observed in 1909, the WLM galaxy is part of the Local Group, about 10 million light years (3.1 Mpc) across, this is the set of more than 35 galaxies which includes our own Milky Way. ... I compared this little galaxy to a living fossil because looking at it gives us an insight into a past era in the UniverseтАЩs history. ... Distances and metallicities for 17 Local Group galaxies? . ...

Еще в разделе: (Показать все результаты (>2779) - www.armaghplanet.com/ )

• Exoplanet HAT-P-1b: weird, warm and fuzzy | Astronotes
• Red dwarfs: The most important stars in the Universe | Astronotes
• Unique Martian Sky Crane Tested | Astronotes

... 2015). ... Optical spectroscopic monitoring has been conducted of two O stars in the Small and one in the Large Magellanic Cloud, the spectral characteristics of which place them in the Of?p category, which has been established in the Galaxy to consist of oblique magnetic rotators. All of these Magellanic stars show sys- tematic spectral variations typical of the Of?p class, further strengthening their magnetic candidacy to the point of virtual certainty. ... Last Revised: 2015 July 27th . ...

Еще в разделе: (Показать все результаты (>1970) - star.arm.ac.uk/ )

• Armagh Observatory Weather January 2005

... Natalya V. Raguzova and Sergei B. Popov . ... We present a compilative catalogue of Be/X-ray binaries and candidates in the Galaxy and in the Large and Small Magellanic Clouds. This catalogue contains 160 sources and provides information on names and spectral types of optical components, distances, on spin characteristics of neutron stars, and on orbital and X-ray properties of binary systems. ... Be/X-Ray Binaries and candidates in the Galaxy . Galactic sources: comments to the Table 1 . ...

Еще в разделе: (Показать все результаты (>546) - xray.sai.msu.ru/ )

• ADS Abstract Service Results
• Welcome to X-Ray
• Basic Observational Data for Determination of f(q) and

Using the free source form it is not permitted to have comments starting with a C or a * in column 1. This would be a violation of the free format. ... An advantage compared with earlier Fortran standards is that the standard now requires that the compiler can signal if the user deviates from the permitted standard. It is required that a Fortran 90 compiler can signal . ... It has to be possible to ask the program to signal for any extensions outside the Fortran 90 standard. ...

Еще в разделе: (Показать все результаты (>2666) - crydee.sai.msu.ru/ )

• Image: Nijo castle, Shogun palace. The main building. Comparing to temples and
• Crydee.sai.msu.(ru,su) Archive