... The variability of the spectrum of the optical component of the IR-source IRAS01005+7910 was discovered for the first time in the BTA spectra [1]. ... The spectral features include absorptions that form in near-photospheric layers, narrow envelope emissions, and emission-absorption profiles that form in photosphere-to-envelope transition layers (the wind). ... Discovery of spectral variation in the optical counterpart of IRAS01005+7910. ... Dashed line - envelope curve of all the SiII 5979 profiles ...

... December 31, 1995 . The X-ray Sources of M31 . Credit: ROSAT , MPE , NASA . Explanation: Just like our own Milky Way Galaxy , the nearest major galaxy M31 has many star systems spewing high energy radiation . ... The X-ray sources in M31 occur in globular clusters , the spiral arms , and near the galaxy's center. ... M31 has more X-ray sources near its center than our Galaxy, and the reason for this is currently unknown. ... About APOD | ... NASA Technical Rep.: ...

... The overall globular cluster population is divided by gap in the metallicity function at [Fe/H]=-1.0 into two discrete groups with well-defined maxima at [Fe/H]=-1.60?0.03 dex, and -0.60?0.04 dex. ... Clusters with extremely blue horizontal branches occupy a spherical volume of radius ~ 9 kpc, have high rotational velocities ( V rot =77?33 km/s), have substantial and equal negative radial and vertical metallicity gradients, and are, on average, the oldest group (the old-halo subsystem). ...

Lectures . ... Home Lectures Lecture Series 2010-2011 Lecture Series 2010-2011 ? Greening the Earth Using Space Resources? by Greg Matloff . ... Lecture Series 2010-2011 . ... 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 . ... Amateur Astronomers Medal . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

... SPARCompiler(TM) Fortran 90 1.0 . FORTRAN 77 3.0.1 . ... important of these. -ansi: Report non-ANSI extensions. -c: Suppress linking, produce .o files -e: Recognize extended (132 character) source lines -fast: Specify common set of performance options - fixed : Interpret all Fortran source files according to fixed form rules -flags: Print summary of compiler options -fnonstd: Non-standard initialization of floating-point hardware -fnonstop: Execute without trapping on invalid, overflow ...

The Texas survey of radio sources covering -35.5{deg} < {delta} < 71.5{deg} at 365MHz . ... We present the Texas Survey of discrete radio sources between -35.5deg and 71.5deg declination (B1950), which was carried out at 365MHz with the Texas Interferometer during 1974-1983. ... The Texas Survey . ... The sources in the simpler model. ... Right Ascension 1950 . ... field separator . ... Some sources came from Version 6 of the Texas Survey ('TS6' in strp field) or Version 7 ('TS7' in strp field) . ...

SIMPLE = T / file does conform to FITS standard BITPIX = 8 / number of bits per data pixel NAXIS = 0 / number of data axes EXTEND = T / FITS dataset may contain extensions COMMENT FITS (Flexible Image Transport System) format is defined in 'AstronomyCOMMENT and Astrophysics', volume 376, page 359; bibcode: 2001A .. ... IMAGEW = 4256 / image width IMAGEH = 2832 / image height ANRUN = T / Solve this field! ...

Static Fourier spectrometers are often used for spectral measurements of the ionosphere emissions. There are two main advantages of Fourier spectrometers (FS) - large geometric factor and high spectral resolution; these parameters are two orders better than for grating spectral instruments. ... In scanning Fourier spectrometer optical and electric modulation of signal is used to avoid this problem, for static Fourier spectrometer there are no such ways. ...

. Comment on J0126-0123 . No detection: this object has been studied with the Molonglo telescope at 408 MHz (Schilizzi & McAdam 1975) as a source with a size between 2 and 5 . It is near an Abell cluster (Owen & Ledlow 1997). The data could be confused with a strong radio source (3C 40) identified with a pair of galaxies at z=0.018, 170" from our field center. VLBApls home page . Last modified: 16 Oct 2000

Next: The STScI NICMOS Calibration Up: No Title Previous: CONICA: The high resolution . The STScI NICMOS Calibration Pipeline . Introduction . ... Dark Current Subtraction . ... Input Data . ... Scalar Background Subtraction . 2-D Background Subtraction . ... Status and Goals of the NICMOS Calibration Plan . ... Photometry . ... Photometric Performance of NICMOS . ... NICMOS Photometry. ... ST-ECF Grism Spectrum Software for NICMOS Grism Data . ... Analysis . ... STScI NICMOS Software . ...

... The Earth orientation parameters UT1 and polar motion (x pol ; y pol ) are relat­ ed with the values of UT0 and VOL obtained from the LLR analysis for a station with geocentric longitude and latitude (–; OE) by the following expression: 7 UT0 \Gamma UTC = UT1 \Gamma UTC + (x pol sin – + y pol cos –) tan OE 15 V OL = x pol cos – \Gamma y pol sin – At least four normal points for each station--reflector pair at one day were accepted for the diurnal UT0 estimations. ...

Astrophysics Space Missions . ... Space Physics Missions . Data Centers . ... Lectures in Space Science . ... Compton Gamma Ray Observatory (GRO) . ... University of Arizona , Theoretical Astrophysics Program Return to the top of this document . ... JHU/APL AMPTE/CCE Space Science Data Center . ... National Space Science Data Center (NSSDC) . ... Astrophysics Data Facility (ADF) at NASA/Goddard Space Flight Center . ... Center for Atmospheric and Space Sciences/Utah State University (CASS/USU) . ...

Analysis of general features of the chaotic system behavior and investigation of the properties of concrete chaotic sources. ... Analysis of information properties of chaotic systems and chaotic oscillations as concrete objects for information processing and comunications. ... This hypothesis gives a possibility of designing simple mathematical structures accomplishing various processes of information processing using chaos. ... Activities | ... E-mail: chaos@mail.cplire.ru ...

... Structure of Data . ... Catalog . ... In SAI OCL Catalog, we introduce our work on investigation of the Milky Way system of open star clusters. The main goal of our study is a search for new clusters using huge surveys. 168 new clusters have been already discovered by us using J,H,Ks data from 2MASS point source catalog. ... For 141 new clusters, we found their physical parameters using J,H,Ks data from 2MASS catalog and, for a number of clusters, our UBVRI CCD observational magnitudes. ...

Magnetic Flux of EUV Arcades and Dimmings as a Relevant Parameter . ... We study events of the 23th cycle, in which major non-recurrent geomagnetic storms (GMS) with Dst < - 100 nT are sufficiently reliably identified with their solar sources in the central part of the disk. ... Figure 3: FD magnitude vs. eruptive magnetic flux . Figure 4: Geomagnetic storm intensiry (Dst index) vs. eruptive magnetic flux . Figure 5: Geomagnetic storm onset and peak transit times vs. eruptive magnetic flux . ...

... Program of the Course of Radio Astronomy . Moscow State University , Physics Department , Astronomy Division , 4 th year, 60 hours in total) . ... Molecular maser emission. ... The emission of the interstellar neutral hydrogen. ... Pacholczyk, A. G. Radio Astrophysics, W. H. Freeman & Co., ... Frontiers of Astrophysics, Avrett, E. H., ed., Harvard University Press, Cambridge, Mass., ... Kaplan, S. A., Pikelner, S. B. The Interstellar Medium, Harvard University Press, Cambridge, Mass., ...

The Astronomy Net . Articles | AstroGuide | ... Forums . ... H ere you can find resouces to help understand perhaps the grandest of all sciences. ... Upcoming Sky Events . ... This site includes lists of manufacturers, vendors, software, etc. organized in the AstroGuide to help when you are looking to purchase your tools. ... Astronomy Articles . ... Are you interested in writing an article for the Astronomy Net? ... www.astronomy.net . ... dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

Stellarium 0.12.3 . ... StelGeometryBuilder Class Reference . ... buildCircle ( StelVertexBuffer < VertexP2 > *vertexBuffer, const float x, const float y, const float radius, const int segments=128) . ... buildCylinder ( StelVertexBuffer < VertexP3T2 > *const vertexBuffer, const float radius, const float height, const int slices, const bool orientInside=false) . ... Build a fisheye-textured sphere. ... Build a flat texture mapped ring with 3D coordinates (for example for planet's rings) More.. ...

USING THE CORRELATION BETWEEN ISGRI SURVEY RESULTS AND OTHER CATALOGUES TO AID SOURCE IDENTIFICATION John B. Stephen, A. Malizia and L. Bassani IASF-INAF, Via P. Gobetti 101, 40129 Bologna, ITALY, E-mail: stephen@iasfbo.inaf.it ABSTRACT In order to help in the identification of INTEGRAL/ISGRI sources, we have developed a software package which allows a rapid and detailed cross-correlation to be performed between various source catalogues. ... We show below some preliminary results from this analysis. ...

Optical characteristics of non-spherical scatterers . ... A list of reviews (under preparation) and links to the databases of Hovenier's and Gustafson's groups on the visible/infrared and microwave light scattering experiments, respectively. ... Light scattering codes . ... Benchmarks in optical properties . Tables of different light scattering characteristics carefully calculated by different codes (methods). Dependence of optical properties on scatterer parameters . ...