The computed band passes. ... The interim correlator input is filtered by 8 analog filters (50 Mhz wide at the 260 Mhz IF... one for each sub correlator). ... For bandwidths of 25 Mhz and below the real data stream is digitally down converted to complex samples I, Q streams. ... The Top figure is the halfband filter bandpass computed from the filter coefficients. ... The computed filter has aliased power, extra IQ filtering, and two applications of the filter on the resulting real bandpass. ...

... ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... Australia Telescope Online Archive (ATOA) . ... ATCA | ... Australia Telescope 20GHz Survey . ... Visiting Parkes radio telescope . Visiting Australia Telescope Compact Array . ... Parkes radio telescope webcam . ...

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 . ...

STEP INTO THE BLUE - MEADE INSTRUMENTS PRODUCT GUIDE . ... Products . Telescopes . LX850 Series . ... Coronado€о Solar . ... H-Alpha Filters . ... Blocking Filters . ... Coronado 5mm Blocking Filter . ... Blocking filter for Coronado primary filters . ... Coronado BF-5 right angle (1.25" diagonal) type secondary blocking filter. The blocking filter is the second element in any Coronado H-alpha system, it is just as crucial to your safety and the system's performance as the front element. ...

... 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. ...

m31 _B_00098_df.fits TARGET = ' M31 ' / target EXPTIME = 100 . / exposure time (seconds) FILTER = ' (2) B (375-490)' / filter DATE-OBS = ' 2012-11-22T00 :40:42.618' / date of observation (UT) m31 _B_00099_df.fits TARGET = ' M31 ' / target EXPTIME = 100 . / exposure time (seconds) FILTER = ' (2) B (375-490)' / filter DATE-OBS = ' ...

Log windows display messages from all "actors" (instruments, the TCC, the hub...) and allow you to send commands. Controls along the top allow you to filter out unwanted garbage or highlight messages of particular interest. ... Regular Expressions . ... The entry field for "+ Actors" and "+ Commands" filtering accept space-separated regular expressions . ... If you plan to send many messages to a particular actor, you may select the actor from the menu next to the command entry field. ...

... 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. ...

adapted from Observe: Eclipses, published in 1979 by the Astronomical League and "Safe Solar Filters," by B. Ralph Chou, Sky and Telescope, August 1981) . ... Tape TWO pieces of film together into a sandwich, and tape this over the opening in the cardboard. ... The cardboard frame will act as a shade from the bright Sun, while you safely observe through the film sandwich. ... Undeveloped film is not safe. ... tape . ... At the end of one of the tubes, tape the aluminum foil, and make a tiny pinhole. ...

... Archives . ... I decide to discuss Kalman Filter a while ago for the slog after finding out that this popular methodology is rather underrepresented in astronomy. ... When I learned ?Kalman filter? for the first time, I was not sure how to distinguish it from ?Yule-Walker equation? (time series), ?Pade approximant, (unfortunately, the wiki page does not have its matrix form). ... Tags: Cressie , inference , Kalman filter , kriging , MADS , spatial statistics . ... Comment ( RSS ) | ... Chandra Blog ...

extract equivalent widths ew(t) from 2d spectrum f(w,t) compute equivalent widths from normalized spectra smooth a function with a gaussian filter compute a gaussian filter for applying to a FFT calulate moments of a line profile compute periodogram dft(frq) from a light curve f(t). Use CLEAN if clean_mode = 1. fit a parabola fit(xv) to an arbitrary function yv(xv) evaluates a sine function on a given x-array

... BOM2 and the basic block of solar limbograph including pointing and control systems ? ... Fine tracking platform (FTP) for Sun tracking by the sight axis of the limbograph; . ... Tracking system frequency ? ... Controller of the control system and solar fine tracking of the sight axis of the limbograph; . ... The basic relative construction of the elements and instrumental blocks of the "Astrometria" space experiment is shown on the block diagram of units within the complex of SL-200 solar...

Q: Are the magnitudes in the ETCs AB or Vega magnitudes? ... Q: How is the signal to noise defined? A: In optical and infrared imaging, the applications display a signal to noise over the PSF area, which is computed in a circle of radius seeing/plate_scale. ... In optical imaging only, a second signal to noise is computed which is the signal to noise at the central pixel. ... A: The template spectra stored in the database are measured or simulated spectra covering different wavelength range. ...

... Telescopes . ... CCD photometer . ... One of the principal devices used in observations at the telescope Zeiss-1000 is a CCD photometer. ... The count rates (electron per second) for ADU = 1e - computed throughout the image for U = B = R = I = 20.0 for an object observed at air mass equal to 1.0 with the given version of CCD at the telescope Zeiss-1000 are presented in Table 1. Table 1: Quantum efficiency and count rate in the broad-band system of the CCD photometer of the telescope Zeiss-1000. ...

Astronomy Picture of the Day . ... Credit: Philipp Rau Explanation: Christmas Day 2000 featured the final eclipse of the Second Millennium -- a partial solar eclipse visible from much of North America . ... From his location, at eclipse maximum (near picture center) just less than 50 percent of the Sun's diameter was covered by the Moon . ... Publications with keywords: eclipse - millennium - partial solar eclipse . Publications with words: eclipse - millennium - partial solar eclipse . ...

MAKING THE PROFILES . First of all you are expected to load a FITS file ("FILE"-"LOAD"). ... By pressing the middle button you copy the profile from the first profile window to the second one. ... An example: first integral can correspond to the profile of active region and second integral can correspond to the profile of quiet chromospheric region. ... The second profile (which is subtracted from the first one) you extract after clicking on "SUBTRACT"-"MARK QUIET PROFILE" and marking the region. ...

... IRPS is the small size infrared photometer with detector cooled by liquid nitrogen . IRPS was designed as the instrument for work with optical systems with angular apertures . ... Multichannel preamplifiers (N*8) are designed for use with IR and mm wave detectors arrays. ... Thermoelectric cooling system is designed for use with IR detectors. ... IR photodetector modules with detectors cooled by LN2. ... Gas cooled radiation shield optical cryostat, IR detectors. liquid nitrogen capacity 1.2 ltr. ...

... Parameters . Filters . ... Direct images . ... The SCORPIO-2 project: . Spectral Camera with Optical Reducer for Photometric and Interferometric Observations - 2 . The broad-band glass filters made in SAO RAS are used for the observation in the Johnson-Cousins (UBVRI) photometric system in the direct images mode. The glass filters transmission curves are shown by solid line. ... The filters transmission curves of the `comets' filters measured with the SCORPIO-2 in the F/4 beam. ...

... Skalnatґ Pleso 43, 1 ­ 2, (2014) e Mini-MegaTORTORA ­ multichannel system for wide-field optical monitoring with high temp oral resolution V. Sasyuk1 , G. Beskin2 , S. Karp ov2 , S. Bondar3 , A. Perkov3 , E. Ivanov3 , E. Katkova3 and A. Shearer4 2 Kazan Federal University, Russia Special Astrophysical Observatory of Russian Academy of Sciences, Russia 3 Insttitute for Precise Instrumentation, Russia 4 National University of Ireland, Galway, Ireland Received: November 4, 2013; Accepted: ?? ...

... IC 1396 . IC 1396, better know as the Elephant's Trunk. ... LGB (no red)and H filters as follows: . L - 25 images, G and B - 15 images each, all with a subframe of 180 seconds. Halpha (Used Halpha in place of Red filter) - 20 images of subframe 360 seconds. Processed/stacked with CCDStack. Combined and stacked with PS CS5. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...