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. Pulkovo Observatory of Russian Academy of Sciences is situated . near Saint-Petersburg. It was founded in 1839. 196140, Saint-Petersburg, Pulkovskoye chaussee 65/1 . English version . Russian version . This page has been accessed times since May 1, 1999.

... HST Phase II Proposal Instructions for Cycle 20 > Chapter 12: Cosmic OriginsSpectrograph (COS) > REFERENCE INFORMATION > 12.14 COS Spectral Elements and Central Wavelengths . ... Table 12.3: COS Spectral Elements and Central Wavelengths . ... Spectral Element . Central Wavelengths (Angstroms) . ... MIRRORA 2 . ... MIRRORB 3 . ... The MIRRORA spectral element positions a flat mirror in the beam to produce an image of the sky with a field of view slightly larger than the diameter of the aperture. ...

... The x-ray spectral analysis consists of a comparison between the observed pulse height spectrum and a pulse height spectrum calculated using a given spectral model. ... To obtain the spectral parameters for an x-ray source, several steps need to be followed. For each source: . ... obtain the best fit parameters for a spectral model - repeated for each model of interest . obtain a 1-D or 2-D grid of values around the best fit values - this can be done for as many models as desired . ...

Next: Definition of objects Up: Wavelength Calibration Previous: Detection of Arc . ... You identify at least 2 arc lines in one slitlet with the command IDENTIFY/MOS . The command CALIBRATE/MOS then performs a first fit for the CCD row with the identified lines. mode LINEAR . ... These values are used as first fit of the first selected CCD row. ... The automatic line identification is repeated with this fit in order to identify additional lines to further improve the dispersion curve. ... FIT . ...

The Survey of Ionized Gas in the Galaxy, Made with Arecibo (SIGGMA) is using the Arecibo L-band Feed Array (ALFA) to create the most extensive radio recombination line (RRL) survey ever made. ... We will use these data to identifiy new HII regions, compute HII region electron temperatures, investigate photodissociation region physics with carbon RRLs, and investigate the origin of the warm ionized medium. ... In hot gas, atoms can become ionized, leaving ions and free electrons. ...

... commands . ... data_spectrum <name> : data in "spectrum" format . ... Repeat command to add additional mask regions. sigma is the s.d. to apply to the data within the region to be masked. ... Repeat command to add additiona continuum regions. ... cont_reg_clear : Clear current continuum regions . ... The observed spectrum is then multipled by this filter to obtain a new spectrum for use by SFIT. cont_sigma : Computes standard deviation of data in continuum regions and applies it to current data . ...

... Moscow, Russia E-mail: krivosheev@iki.rssi.ru Notes: · · The Monte Carlo method (s) is also called the statistical test method An innumerable number of processes can be listed the outcome of which is not determined and has probabilistic nature, but these processes obey statistical laws, so to obtain the result we have to make multiple similar tests, i.e. to use the MC method Because probabilistic processes are widely spread in nature, the MC ...

... One can then define (via evselect called with withzcolumn =Y withzerrorcolumn =N) a `corrected' spectrum within region (usually in sky coordinates) and its associated error : . ... The corresponding source spectrum is also obtained by summing over the region, and the model spectrum (to be compared to the data) by multiplying with the central effective area and applying the response matrix. ... This means that care must be taken to have enough counts per spectral bin. ...

... A method for processing IRAS-LRS data via the Groningen IRAS server is presented. ... Using the GIPSY software, we are able to obtain and to select reliable LRS spectra from the IRAS database. ... Raw IRAS data in GIPSY are stored as 4-D data sets (cf. ... The IRAS data were obtained using the IRAS data base server of the Space Research Organisation of the Netherlands and the Dutch Expertise Centre for Astronomical Data Processing funded by the Netherlands Organisation for Scientific Research. ...

IBIS Data Analysis . ... IBIS . ... Flat Fielding - Introduction . The images obtained by IBIS will have intensity variations across the field of view that are not due to the solar image, but rather caused by instrumental effects that alter the observed intensity in each point of the field of view. ... IBIS Flat Fielding Techniques . ... Therefore, it is desirable to obtain the flat field measurements center on a point along the equator near the heliographic center of the solar disk. ...

... Molonglo at 408 MHz (3') and Parkes 64-m at 5 GHz (4'). ... Effelsberg 100-m at 4.9 GHz (2'.6). ... VLA at 1465 MHz (20''?25'') and Einstein observations, with review of flux densities. ... VLA at 1.4 and 5 GHz, plus H I absorption, Einstein observations. ... VLA at 1.4/1.5 GHz (2".6?1".8: S=16.6?0.9 Jy) and 5 GHz (2".1?1".5: S=8.4?0.9 Jy) for spectral studies. ... Multi-epoch VLA observations at 1.4/1.5 GHz and 5 GHz, for expansion studies. ... VLA at 330 MHz (25''), 1.5 GHz (25''), and 74 MHz. ...

Gamma-rays from the GC . M.Chernyakova (DIAS), D.Malyshev (DIAS), F.Aharonian (DIAS, MPIK), R.M.Crocker(MPIK), D.I.Jones(MPIK) 1 10°x10° Count and TS maps (>300 GeV) Gamma-rays from the GC 2 TS maps of the GC at different energies 300 MeV ­ 3GeV 3 GeV ­ 30 GeV 30 GeV ­ 300 GeV Gamma-rays from the GC 3 4 Gamma-rays from the GC Lightcurve 5 Gamma-rays from the GC Source spectrum Model X-ray and low-energy emission come from the central object, probably SMBH accretion disk. ...

... Examine your bandpass calibrator vs. time and vs. frequency: Task: uvplt vis=2255-282.88638 axis=time,phase [or time,amp] device=/xw size=2,6 yrange=-180,180 [phase only] Task: uvspec vis=2255-282.88638 axis=chan,phase [or chan,amp] interval=1000 [average all data in time] nxy=1,3 yrange=-180,180 [phase only] Note the number of edge channels on each end of the spectrum for flagging. ... Examine amplitudes on flux cal: Task: uvplt vis=uranus.88638 axis=time,amp select='pol(xx,yy)' device=/xw 18. ...

Communications For Your Astronomy Event . Articles | ... GMRS has been around for many many years. ... If you are reading this you probably do not care about the old school and are only interested in what GMRS has to offer for your basic communication needs. ... However, you really only need to pay attention to the "Well Known Channel" the radio manufacturers like Cobra, Uniden, Midland, etc. seem to have agreed on. ... Channel . ... 462.5625 MHz . ... 5.0 Watts . ... www.astronomy.net . ...

... Science User Portal . ... ESO, the European Southern Observatory . ... Travel and Contacts . Travel to ESO Headquarters . ... Survey Telescopes . ... ESO Science Newsletter . ... ISAAC . ... This image is a reproduction of a long-slit ISAAC spectrum of the central region of the active galaxy NGC 1808. ... Technical information: this image€аshows a raw, long-slit IR-spectrum in the 2.3 €Іm wavelength region, obtained with ISAAC along the major axis of this galaxy. ... NGC 1808 , Spectrum . ...

... 2014: . Suppression of cooling by strong magnetic fields in white dwarf stars . ... 69, 439, 2014. Evidence of supercritical accretion in SS433 . ... We discovered a flat portion (white noise) in the power spectrum of SS433 due to an abrupt increase of the disk thickness in the supercritical region. ... Both the hard X-ray radiation and the visual light are seen reflected from the walls of the funnel that forms in the wind of the supercritical disk of SS433. ... Archive . ...

Astronomy Picture of the Day . ... 1.10.1995 . ... Credit: NASA , HST , WFPC 2, J. Gallagher, ( U. Wisconsin-Madison ) Explanation: The pictured core of the galaxy NGC 253 shows an exceptionally high rate of star formation. In the center are some of the densest knots of stars ever found, surrounded by glowing gas and dust lanes. Galaxies where such high star formation rates are seen are called "starburst" galaxies. ... October 1995 . ... 1995 1996 . ... U. Based on Astronomy Picture Of the Day ...

... 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. ...

SAI 175 anniversary . ... Moscow University . Search for in SAI Moscow University Search for in Russian astronomical resources . ... SAI Astronomical Databases . ... Browse SAI Software archive(ftp.sai.msu.su) . ASTRONET.RU - Russian Astronomical Network (available in translit also) . ... SAI Supernovae Research Group . ... Department of the Galaxy and Variable Stars (in Russian) . Sternberg Astronomical Institute Seminars . ... All-Russian Astronomical Olympiad (in Russian) . ...