. Next: Orbital period derivatives Up: Distances Previous: Neutral hydrogen absorption . љ . SNR distance poorly determined - no use . Crab nebular is the exception . Globular cluster distances known . LMC, SMC pulsars from LMC, SMC distances . Optical Companions, about 10 possible . Jon Bell . Thu Dec 19 15:15:11 GMT 1996

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• Neutral hydrogen absorption
• Orbital period derivatives
• A Tutorial on Radio Pulsars

... astro-ph/0003002 We cross-identified the ROSAT Bright Source Catalog (RBSC) and the NRAO VLA Sky Survey (NVSS) to construct the RBSC-NVSS sample of the brightest X-ray sources (~0.1 counts s^{-1} ~= 10^{-12} ergs cm^-2s^-1 in the 0.1--2.4 keV band) that are also radio sources (S ~= 2.5 mJy at 1.4 GHz) in the 7.8 sr of extragalactic sky with |b| > 15deg and DEC > -40deg. ... We used the more accurate radio positions to make reliable X-ray/radio/optical identifications down to the POSS plate limits. ...

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• THE TEXAS SURVEY: Optical identifications
• What was measured?
• The Hamburg/RASS Catalogue of optical identifications

... Home Education Classes AAA Winter Astronomy Class: Measuring Distances in Space тАУ Dec 2015 тАУ Feb 2016 . ... Classes . AAA Fall Astronomy Class: Astronomy Basics тАУ October-November 2015 . AAA Winter Astronomy Class: Measuring Distances in Space тАУ Dec 2015 тАУ Feb 2016 . AAA Spring Astronomy Class: The Physics of Astronomy тАУ February - March 2016 . ... This MonthтАЩs Sky тАУ April 2016 . ... Dec. ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ...

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• Other-Events ? Page 3 ? Amateur Astronomers Association of New York
• Club Events ? Amateur Astronomers Association of New York

... I present results from several seasons of photometric observations of X--ray sources in the Orion OB1a and OB1b star formation regions. The initial goal was to measure the rotational periods of several dozen pre--main sequence (PMS) stars. ... Infrared and optical data confirm that 90% of the X--ray sources are PMS and about 10% of the PMS stars may have disks. ... I find rotation periods for five stars at confidence of greater than 99.9/ greater than 99/ at much lower confidence. ...

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• The galaxy M100
• The AstroStat Slog distance measure
• The AstroStat Slog Blog Archive Photometric Redshifts

... LABORATORY OF RADIO ASTRONOMICAL OBSERVATIONS . Radio sources identification is one of the most important tasks of the current radio astrophysics. ... Optical idetification. ... Optical identifications of subsample of steep spectra radio sources from RC catalog using 6m SAO telescope of SAO RAS: optical observations. ... Astronomy Reports. ... Identification of radio sources with data of various radio catalogs allows one to construct continual spectrum of the object and its radio structure. ...

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• Absorption bands identified with DIBs
• Radial velocity of the IRAS04296
• Optical identification of the RC catalog radiosources with SDSS . Optical

Supernova Cosmology: Legacy and Future, (preprint) . Goobar, A. and Leibundgut, B. Annual Reviews of Nuclear and Particle Science , 2011, 61, 251 . Cosmological Implications from observations of Type Ia Supernovae, . ... Type Ia Supernovae, . ... Leibundgut, B., Suntzeff, N. B. in "Supernovae and Gamma-Ray Bursts", 2003, . ... Cosmology with Supernovae, . ... Leibundgut, B. in Frontiers of Cosmology, 2005, . ... Twenty Years of SN 1987A . ... ApJS, accepted . ... ApJ, 782, 28 . ...

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• First Rotation Period of Kuiper Belt Object Measured (ESO PR Photo 41/98)
• First Optical Identification of an Extragalactic Pulsar | ESO
• Identifications and Efficiency

Proposal Identi cation No.: PulsarsP1329 Date Received: 2000-99-Jun-01 17:19:36 Technical Page Proposal Type: Regular General Category: Astronomy Sub-Category: Pulsars Sub-Category: Pulsars Observation Category: Total Time Requested: 40 - see below Hours Proposal Title: Pulsar Distance and Galactic Electron Density WeisbergDeterminations via 21 cm Absorption Measurements ABSTRACT: We propose to measure neutral hydrogen absorption spectra of distant pulsars. ... Dec 1998 (4 days; 17-21 hr LST). ...

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• http://www.naic.edu/vscience/schedule/tpfiles/WeisbergtagP1103tp.ps
• http://www.naic.edu/~phil/ter/terfoc.html
• http://www.naic.edu/vscience/schedule/tpfiles/TaylortagA1899tp.pdf

... According to the most popular cosmological paradigm, the greater part of the galaxy mass is accumulated in the dark matter halo. ... The polar ring galaxies (PRGs) reveal external rings or disks of gas, dust and stars rotating in a plane roughly perpendicular to the disk of the central galaxy. ... The shape of the dark halo in the model was chosen so as to achieve the best fit to the observed rotation of both galaxies themselves and their polar rings. ... The SPRC-7 galaxy. ...

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• Metagalaxy sector, archive 2004
• GRB090726
• Metagalaxy sector, archive 2006

... The SDSS 3D Universe Map . ... 28.10.2003 . ... Credit Copyright: Sloan Digital Sky Survey Team , NASA , NSF , DOE Explanation: The latest map of the cosmos again indicates that dark matter and dark energy dominate our universe. The Sloan Digital Sky Survey (SDSS) is on its way to measuring the distances to over one million galaxies . ... October 2003 . ... 2003 2004 . ... Publications with keywords: SDSS - universe - dark energy . Publications with words: SDSS - universe - dark energy . ...

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• Journal "Peremennye Zvezdy"
• Астронет > The SDSS 3D Universe Map
• The Farthest Explosion Yet Measured

... Here comes the SKA. ... HI Gas and Star Formation neutral atomic hydrogen gas cloud (HI) molecular gas cloud (H2) star formation Redshift, Observing the Past The Expanding Universe Hubble`s Law redshift velocity related to distance ... (due to light travel time) Hubble`s Law redshift velocity related to distance distance related to age (due to light travel time) Atmospheric Transmission optical gamma rays, X-rays ultravio let infrared radio ...

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• Untitled1
• Identifier Index
• Philip Lah's Research

... Subject and Problems of Stellar Astronomy. ... Plane of Galaxy, Methods of Its Location Determination. ... Stars Distances. ... Other Methods of Stars Distances Determination. ... Tangential Velocities, Their Determination by Self-Motions. ... Determination of Solar Apex and Spatial Velocity by Radial and Spatial Velocities of Stars. ... Features of Orientation and Parameters of Peculiar Stellar Velocities Ellipsoid. ... General and Selective Light Absorption in Galaxy. ... Darc Clouds in Galaxy. ...

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• INFRARED FOURIER-SPECTROMETER SICH-F
• Researches of Astronomy and Space Physics Department
• Spherical and Practical Astronomy

... Herschel imaging of nearby galaxies undertaken as part of the KINGFISH project allows us to map the dust as seen in emission with unprecedented sensitivity and ~1 kpc resolution. We present here new optical integral field unit spectroscopy for eight of these galaxies that provides complementary 100-200 pc scale maps of the dust attenuation through observation of the reddening in both the Balmer decrement and the stellar continuum. ... ADS Citation Query . ... citations vs. year [year,citations] . ...

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• DrizzlePac: Photometry Demo
• Multi-wavelength Evironment of AM0644-741
• HST this week: 075

. Departement of Quantum Astrophysics . Head: Kurt V.G. , Prof. ultraviolet spectroscopy of planetary upper atmospheres and interplanetary/interstellar medium; . observations of gamma-bursts and optical identification of their sources; . long-base optical interferometry. Staff: .

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... 2000 October 19 . The Farthest Explosion Yet Measured . ... What is known is that satellites across our Solar System reported on 2000 January 31 a tremendous explosion of gamma rays had occurred towards some previously uninteresting direction. ... The VLT not only recorded an optical counterpart , shown above , but also was able to estimate that the cosmologically-induced redshift was an astonishing 4.5 -- placing GRB000131 farther across the universe than any explosion so measured. ...

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• APOD: 2009 October 28 - JKCS041: The Farthest Galaxy Cluster Yet Measured
• APOD: May 27, 1999 - NGC 4603 and the Expanding Universe
• APOD: May 13, 1997 - Optical Transient Near GRB970508 Shows Distant Redshift

... Accurate identification of physical binary star systems has become of increasing interest in recent years. ... Identification of physical binary star systems, with an estimated reliability of such identifications based on the theory of probability, is also important for current and future efforts to find binary star systems that are candidates for observations with the aim of determining their orbits and component masses. ... probability of the proximity of proper motions and ; . ...

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• Interactive Fitting of EUVE Emission Line Spectra
• ADASS 2003 Conference Proceedings
• In-Orbit Calibration of the Distortion of the SOHO/LASCO-C2 Coronagraph

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. ...

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• astro-ph

OPTICAL IDENTIFICATIONS OF INTEGRAL / RXTE SOURCES WITH 1.5-METER OPTICAL TELESCOPE RTT150 I.Bikmaev (1,2), M.Revnivtsev (3,4) , R.Burenin (3) R.Sunyaev (3,4) , N.Sakhibullin (1,2) (1) Kazan State University, Kremlevskaya Str., ... 1, D-85741, Garching bei MЭnchen , Germany (3 (4) ABSTRACT We present the first results of our project on optical identifications of INTEGRAL / RXTE hard X-ray sources by using scientific instrumentations of the 1.5meter joint Russian-Turkish optical telescope RTT150. ...

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• http://hea.iki.rssi.ru/integral06/papers/E36_Stephen01-07May07_17:57:56.pdf
• Russian Turkish 1.5-m telescope

... Protective equipment: . ... Employers should use this information only as a supplement to other information gathered by them, and should make independent judgement of suitability of this information to ensure proper use and protect the health and safety of employees. This information is furnished without warranty, and any use of the product not in conformance with this Material Safety Data Sheet, or in combination with any other product or process, is the responsibility of the user. ...

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• ZnTe Safety Data Sheet
• CdS Safety Data Sheet
• ZnSe Safety Data Sheet

... For more distant stars we must use other techniques. ... Hence if we see a distant galaxy and can pick out any cepheids lying within it, we can calculate its distance. ... Here then is another method to gauge the size of the Universe and there are yet more. volume at high enough temperature a nuclear fusion reaction sweeps across the white dwarf's surface and eventually we will see a spectacularly bright new star (hence nova) in our skies. ... Why is this relevant to the size of the Universe? ...

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• http://www.armaghplanet.com/pdf/AstroTopics/Measuring%20the%20Universe/cepheid.pdf
• http://www.armaghplanet.com/pdf/AstroTopics/Measuring%20the%20Universe/Parallax.pdf
• Most distant galaxy ever seen | Astronotes

... Despite new observation methods provided by radar and satellite instrumentation , optical measurements are still important when studying auroras . ... Because of the monochromatic nature of the auroral light, photomultiplier tubes with very narrow band filters were used in the measurements. ... The spectra of the background emissions from atmospheric impurities (clouds, ice crystals, etc.) is rather continuous, and measurements just outside the auroral emission lines are valid for the line itself. ...

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• Applying Kepler's Third Law
• Kepler and His Laws
• Trigonometry--what it is good for?