... 371Gregory Taylor . ... We persent a catalog of 1274 discrete sources detected during a 5 yr, 6 cm, radio-patrol survey of the galactic plane for variavle sources. ... Seventy-five percent of the sources are weaker than 75 mJy, and as a consequence reliable sources and 27 possible variables were detected, of which 64 % exhibited shirt-term variability. ... A comparison with previous centimeter variability studies suggests the possible existence of two distinnct variability components. ...

Authors: V.A. Marsakov , Yu.G. Shevelev , . Journal: 1988, Astron Zh. ... Absolute magnitudes, metallicities, effective temperatures, surface gravities, distances, and tangential velocities are calculated for 5498 F stars with homogeneous data on uvby photometry and proper motion, and placed within 80 pc from the Sun. Components of space velocities, eccentricities of galactic orbits, perigalactic and apogalactic distances, and maximal remotness from galactic plane are presented for 1787 stars. ...

... The 7 and 15 um observations of selected fields in the Galactic Plane obtained with ISOCAM during the ISOGAL program offer an unique possibility to search for previously unknown YSOs, undetected by IRAS because of lower sensitivity or confusion problems. ... The main indications of the previous analysis are confirmed, but the criteria for selecting YSO candidates had to be revised to select only bright objects, in order to limit the contamination of the sample by Post-MS stars. ...

... Annual Meeting . ... Other Workshops, Conferences and Events . ... Galileo Teacher Training Program Workshop . ... Submit an abstract (please read guidelines below first). ... Please fill out the abstract form carefully since the program committee will be rating the proposals based only on the information you provide. ... For the conference, you may be the lead author on one poster paper, and one oral session: a ten-minute oral paper presentation or an hour-long workshop or a special interest group....

... Using a simple 2-D Gaussian Point Spread Function (PSF) on a constant (flat) sky background, I derive a theoretical photometric and astrometric performance model for analytical and digital PSF-fitting stellar photometry. ... The photometric performance is maximized when either the effective background area or the effective-background-level measurement error is minimized. ... An important, but frequently ignored, noise source is the uncertainty of the measurement of the effective background level ( )...

... ATNF Colloquium . Elizabeth Alexander, the 'Norfolk Island Effect' and the Genesis of Solar Radio Astronomy in Australia . ... In this seminar I will review Elizabeth Alexander's investigation of the `Norfolk Island Effect' and explain how her work led to the pioneering solar radio astronomy investigations carried out by Joe Pawsey and his colleagues at the Collaroy, North Head and Dover Heights radar stations between October 1945 and March 1946. ... today * ATNF | ...

Detecting Bias in a Self-Organizing Map of Galaxy Photometry Data Zach Clayto , Peter Capa , Dan Maste 1 1 r 2 k 2 rs Ohio Wesleyan University, 2Infrared Processing and Analysis Center, California Institute of Technology Abstract High redshift (very distant) galaxy surveys record broad-band photometry for billions of galaxies in order to measure distances in a faster, more cost-effective way than spectroscopy. ... High-redshift galaxies can be identified efficiently in such a mapping. ...

... For this paper: postscript PPEUC CMB index 1 Introduction.. ... We report on a 16 ks X-ray observation with the ROSAT PSPC towards the center of a CMB decrement detected by Jones et al. (1997) in the direction of the quasar pair PC1643+4631 A & B. At the position of the decrement we find no evidence for emission by hot gas which could give rise to the Sunyaev-Zel'dovich effect. ... We conclude that the CMB decrement is not a typical galaxy cluster. ... 2 The ROSAT PSPC observation . ...

Proposal Identification No.: P2627 Date Received: 2011-Feb-04 15:15:03 Technical Page Proposal Type: General Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Regular Pulsars 20 Hours 2.5 hrs NANOGrav precision timing: Testing a new ISM correction technique Gravitational waves may be directly detected within the next decade through precise timing of an array of pulsars. ... This proposal requires coordination with GPS L3 at 1381 MHz. ...

. Next: Diameters Up: Stellar parameters from calibrations Previous: Gravities Contents . Temperatures of stars are derived from their spectral type and luminosity class. Calibrations are stored in files spec_par.V, spec_par.IV, spec_par.III, spec_par.II, spec_par.I in oyster/starbase . teff_stars Compute effective temperature for all stars in startable. teff_star ( spectrum _char ) Function. Return effective temperature for star with specified spectrum. Christian Hummel 2015-04-28

... We also present independent relationships between the visual surface brightness parameter FV and the colours (V \Gamma R), (V \Gamma I), (R \Gamma I) and (V \Gamma K). We find that (U \Gamma B) and (B \Gamma V ) are unsuitable as T eff indicators. The tightest relationship in each case is found for the (V \Gamma K) index. Our mean relationships agree reasonably well with similar relationships derived by other authors, where such are available. ...

... The ROSAT Bright Survey: II. Catalogue of all high-galactic latitude RASS sources with PSPC countrate CR > 0.2 s -1 . ... 1S We present a summary of an identification program of the more than 2000 X-ray sources detected during the ROSAT All-Sky Survey (Voges et al. 1999) at high galactic latitude, |b| > 30degr , with countrate above 0.2 s -1 . This program, termed the ROSAT Bright Survey RBS, is to more than 99.5% complete. ...

To appear in "Fourth Workshop on Robotic Autonomous Observatories (2015)"RevMexAA(SC) MASSIVE PHOTOMETRY OF LOW-ALTITUDE ARTIFICIAL SATELLITES ON MINI-MEGATORTORA S. Karpov, 1, 3 E. Katkova,2 G. Beskin, 1, 3 A. Biryukov3,4 S. Bondar,2 E. Davydov5 E. Ivanov,2 A. Perkov,2 V. Sasyuk3 RESUMEN Favor de prop orcionar un resumen en espanol. ... The nine-channel Mini-MegaTORTORA (MMT-9) optical widefield monitoring system with high temporal resolution system is in operation since June 2014. ...

... X-ray Diffraction Effects in Defect ZnS Single Crystals. Abstract: . X-ray techniques have been used to investigate single ZnS crystals grown according to Bridgman by vertical oriented crystallization under an argon pressure of 5-6 MPa. ... Some reflections show multiple diffraction. ... The model of the multiple diffraction, based on the assumption that the effect increases when the phase invariant is equal to zero, has been considered. This model describes the experiment satisfactorily. ...

Astronomy Discussion Forums . ... God and Science ћ SETI ћ Software ћ UFO ћ XEphem . ... SETI Assumes ET Doesnot Care About Can Being Detected What If . ... Post Message | ... My search on how to go undetected in space and SETI Search for Extraterrestrial Intelligence SETI. ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

. ASME Paper 95-GT-437. Jacques Lewalle, jlewalle@syr.edu

ON THE IMPACT OF THE GALACTIC ABERRATION ON VLBI-DERIVED PRECESSION MODEL Z.M. MALKIN Pulkovo Observatory Pulkovskoe Ch. ... Corrections to adopted precession rate are usually computed from the linear trends in long-term time series of celestial pole offset (CPO), which are the differences between the measured and the theoretical coordinates of the celestial pole. ... CONCLUSIONS We have estimated the impact of GA on parameters of precession-nutation model derived from VLBI observations. ...

Hide Zen home . ... Index . ... Title : New indexing concept for very big astronomical catalogues and its realization for main astronomical queries (cone search and XMatch) in open source ORDBMS PostgreSQL. ... In this work we present Q3C - the new sky indexing scheme and its realization for open source ORDBMS PostgreSQL. ... 0 Comments on q3c adass abstract This page is read-only View other revisions Administration . ... Zen, 2003-2007 ...

... Acceleration of particles in the vicinity of a massive black hole We propose a two-step mechanism for charged particle acceleration in the magnetosphere of a massive black hole surrounded by an accretion disk. Particles first gain energy by stochastic process during the accretion phase. It is shown that effective proton acceleration up to energies eV is possible in the turbulent magnetized accretion disk. ...

... An Automated Search for Extrasolar Planet Transits M. G. Hidas, J. K. Webb, M. C. B. Ashley, C. H. Lineweaver University of New South Wales, Sydney 2052 NSW, Australia J. Anderson University of California, Berkeley, USA arXiv:astro-ph/0209388 v1 19 Sep 2002 M. Irwin Institute of Astronomy, Cambridge, UK Abstract. We are setting up a new search for transiting extra-solar planets using the 0.5m Automated Patrol Telescop e at Siding Spring Observatory, Australia. ... 2002; Mayor et al. 2002). ...