... Virtually all detectors and telesco pes are sensitive to only a particular range of frequencies or wavelengths. ... Flux per unit wavelength or frequency So in practice, when we measure how much radiation we receive from some object, we usually mean the energy at some particular frequency, not the integral of the energy over all frequencies (which would be the bolometric brightness). ... But imaging data at UV, optical and IR wavelengths often uses a different approach: broad-band imaging. ...

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• GSAOI Other Instrument Links Page
• RSAA Annual Report 1998
• Other Infrared Instruments.

RADIOASTROPHYSICAL DEPARTMENT • INSTITUTE OF SOLAR-TERRESTRIAL PHYSICS RAS SB . ... SSRT - Receiving systems . The SSRT has two independent receiving systems for recording solar observational data, and several ancillary receivers for checking, setting up and adjusting the instrument. The base receiving systen is a multichannel filter receiver for a simultaneous recording in 180 channels with the 500 kHz band each, adjusted at steps of about 600 kHz. ... Channel's band . ...

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True Color Image Gallery: Galactic SNR | Magellanic Cloud SNR . ... Radio Images Page . ... Exposure uf . ... 10102 . ... Exposure uf Exposure time of unfiltered event file . Exposure f Exposure time of filtered event file . ... Click left mouse button on hyperlink below to download file . ... Event 2 FITS File . ... AUX file . ... see fit detail page for more about the fit. see chandra spectrum page for region used. Images in Several Energy Bands . True Color Image . ... 1.0" . ...

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• Chandra Images for G189.1+03.0C
• Chandra Images for SNRJ 0540.1-6919
• Chandra Images for G074.0-08.5NE

Observatory, 125, 23­24, 2005 NEGATIVE REPORT OF OCCULTATION BY THE D-TYPE ASTEROID (773) IRMINTRAUD By Apostolos Christou and Mark Bailey Armagh Observatory An unusual negative observation is reported of the predicted occultation of the star HIP 186 by (773) Irmintraud on the morning of 21 July 2004. ... This provides a constraint on the asteroid's position at the time of the event. ... References (1) R. L. Millis, D. W. Dunham, "Precise measurements of asteroid sizes and shapes from occultations". ...

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• Explosive Events
• Observations with the Faulkes Telescopes
• Terry Mosely's Bulletins

... The choice of the spectrograph design (Fig.2) is determined by the quantity R, the overall dimensions of the PF cage and the restrictions on the rigidity of the structure of the device. ... As the camera's objective a fast 4-lens aplanat is used having a focal distance F cam =140 mm and a relative aperture of 1:1.8, the resolution at the centre is no less than 80 gr/mm, that over the field at a distance of 3 mm from the edge along the frame ( ) diagonal is 35 gr/mm. ...

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• GRB follow-up team
• SCORPIO-2 project: filters
• SCORPIO: Direct images

NMW survey overview . Access image archive . ... The New Milky Way survey aims to detect bright (V<13.5) optical transients near the Galactic plane using an automated wide-field (8x6 deg.) system capable of surveying the whole Milky Way area visible from the observing site in one night. ... All images obtained during the transient search survey are available online (please use the image archive access form ). ... Images per field: . ... Images per night: . ... Milky Way imaging time: . ...

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BRIGHT OPTICAL FLASH FROM GRB 060117 - AN EXAMPLE OF EVENT DETECTED WITH OMC CLASS INSTRUMENT Д Д Petr Kubanek1,2 , Martin JelД inek3 , Michael Prouza4,5,6 , Rene Hudec1 , and Martin Nekola1 1 Astronomicky ustav Akademie ved Ceske republiky, Ondrejov, Czech Republic ДД Д 2 INTEGRAL Science Data Center, Chemin d'Ecogia 16, Versoix, Switzerland 3 Instituto de AstrofД isica de AndalucД (IAA-CSIC), Granada, Spain ... INTEGRAL GRBs are detected during -ray observations of knows sources. ...

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• http://hea.iki.rssi.ru/integral06/papers/D31_Bikmaev01-05Feb07_11:12:42.pdf
• Fast search through RTT150 data archive
• RTT150 Technical Description

Large sunspots were occasionally seen far in the past without any instruments, when the sun was dimmed by thick haze, but not much was remembered of those observations. ... Sunspot Cycle (1850 - 1975) . One who was greatly influenced by Schwabe's discovery was an English gentleman of independent means, Richard Christopher Carrington , who devoted himself to the study of sunspots. ... Carrington had seen a flare, of the rare variety that is visible in white light (only about 50 are known). ...

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• The Sun
• The Wind Spacecraft
• Close-up of the Aurora

ATMoB "Open Cluster Observing Award " Guidelines Purpose: To promote observing among the membership of the Amateur Telescope Makers of Boston through participation in the Open Clusters Observing Awards program. Introduction: This awards program is oriented towards visually observing open clusters above magnitude 9.9. ... It turns out that a very unprejudiced and convenient method to dermine the limiting magnitude is to count the number of visible stars in certain areas on the sky. ...

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• Amateur Telescope Makers of Boston ATMoB Observing Awards Program
• Amateur Telescope Makers of Boston
• Mars pictures from Stellafane by Paul Valleli

... Here is an image a supernova in NGC4704. The image taken at 6.4.1998 at 21.08 UT, CCD ST-7, 840s. Track and Accumulate exposure (21x40s), no filter, dark and flat corrected, temp -20c, telescope used 152/2063 refractor. Image were taken at the center of our city, Jyvaskyla. ... Dark lines in image are error of track and accumulate process and even dark and flat field were corrected, there still remain some noise. ... Back to Supernovae in NGC and IC galaxies. ...

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• Posting to VSNet
• Supernova 2006sr in UGC 14
• Supernova 1999ee and 1999ex in IC 5179

... They are concerned with Attitude Control System of the spacecraft, satellite visibility from tracking stations, limits on the satellite autonomous operations during the orbit, and needs for auxiliary operations with the spacecraft. ... Among the operational constraints the most important one is the number of programmed slews per orbit, which determines the maximum number of radio sources to be observed during one orbit. ... System temperature (K) . ... Progress of the RadioAstron Project in Pictures...

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... 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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A Terra Hunting Experiment at the INT Rationale To detect smaller mass planets (down to 1Mе) using the radial velocity technique, we need to be able to retrieve a signal in the limit of stellar variability noise. ... Such an observing program is not feasible with a non-dedicated telescope. To address this, we are proposing a "Terra Hunting Experiment" to be performed using a close-copy of the HARPS spectrograph installed on the 2.5m Isaac Newton Telescope (INT) in La Palma. ...

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• http://www.mrao.cam.ac.uk/~bn204/phd_era/publications/kiel-proceedings.pdf
• http://www.mrao.cam.ac.uk/~bn204/mk2/publications/2009/tpower-v01.pdf
• http://www.mrao.cam.ac.uk/~kjbg1/lectures/lect1_1.pdf

... Several frames taken and best selected saturn _0p15s_g_205d.fits TARGET = ' Saturn ' / target EXPTIME = 0.15 / exposure time ( seconds ) FILTER = ' (1) g (400-530) ' / filter DATE-OBS = ' 2010-03-31T04 :31:09' / date of observation (UT) saturn _0p15s_g_crop_205d.fits TARGET = ' Saturn ' / target EXPTIME = 0.15 / exposure time ( seconds ) FILTER = ' (1) g (400-530) ' / ...

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• Observing for Students and Visitors

... Iowa Robotic Telescope | ... Talon is based on OCAAS, a software suite developed by software engineer Elwood Downey ( Clear Sky Institute ) for use at the University of Iowa ?s first remote facility (the ATF, or Automated Telescope Facility). ... XObservatory : Telescope Control Interface . ... This program calls upon and coordinates much of the interrelated portions of the Talon architecture, and forms the primary control panel for the telescope, dome, and peripheral systems when used locally. ...

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A computer controlled low light photometer for nightglow observations. Hardware units of portable photometer for low light measurements, especially night glow emission is described. ... Interface card contain three channels of 24 bit counter, 4 channels of 12 bit ADC and the buffer bus for the controlled motors of the altazimuthal fork mounting and filters wheel, the position encoders. ... Where N( ) is output signal photometer generated input light flux F( l ) . ... PMT # . 599 . ...

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• Optical static Fourier spectrometer
• Practical Astrophysics
• TELEVISION CAMERA TVC

... Observing . ... Home Observing High Line ? Solar Observing . ... High Line . High Line - Solar Observing . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... The AAA hosts solar observing on the High Line one Tuesday afternoon each month from April through August. ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

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• Central Park ? Solar Observing ? Amateur Astronomers Association of New York
• Poe Park, The Bronx ? Solar Observing ? Amateur Astronomers Association of New
• Amateur Astronomers Association of New York ? Amateur Astronomers Association

The AstroGuide . ... AstroGuide | ... AstroGuide Listing . ... See many more Astronomy Listings by: Category or Alphabet . ... Day Star Filters, LLC . Filters for use with solar observing. ... Listed Since February 16, 1999 . ... 909) 591-4673 . ... 909) 591-6886 . Web Site . ... Web . ... 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 ...

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• Observation Report From Coyle 07/19/03 - an Astronomy Net Observation_reports
• Color Filters - an Astronomy Net Eyepieces Forum Message
• Finding Himalia, The Fifth Brightest Moon Of Jupiter - an Astronomy Net Article

... Energy . ... Solar Wind . ... Field . ... The Sun is our nearest star and the source of energy for life on Earth. ... For centuries astronomers wondered whether they were clouds floating in the Sun's atmosphere, but we now know that they really are huge regions of magnetic field, about as intense as the field at the poles of an iron magnet. For some reason the field slows down the flow of heat from the Sun's interior and keeps sunspots slightly cooler than their surroundings. ... Solar Eclipses . ...

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• Events on January 10-11, 1997 - INTERBALL observations
• The Sun -- History
• GRB observations