... We will consider the rms, (K), for observations with a receiver of system temperature, T , frequency resolution, per polarization, and total integration time per observing cycle, . ... For ``in-band'' frequency switching, the line under investigation is always in the observing band. ... Position Switching or ``Out-of-Band'' Frequency Switching: Here the line is only observed for one half of the time, with noise being present all of the time. ...

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• Example Observing Projects
• REU Science Area
• Continuum Observing

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... Note: Click here a longer, much more comprehensive overview of the polar aurora . ... Magnetic Field . ... Aurora . ... 3b. Fritz Aurora . ... Electrons . ... Typical aurora (Dick Hutchinson ї) . In Alaska, Canada, Norway, Finland or northern Russia, on a clear night, a greenish glow is often seen in the sky, known as the "Northern Lights." ... Auroral light is produced at a height of about 100 km (60 miles) when fast electrons, arriving from space, slam into atoms and molecules of the atmosphere. ...

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• Solar Energetic Particles
• Chronology of Magnetospheric Exploration
• Spacecraft Observing Earth's Space Environment

... Note: Click here a longer, much more comprehensive overview of the polar aurora . ... Magnetic Field . ... Aurora . ... 3b. Fritz Aurora . ... Electrons . ... Typical aurora (Dick Hutchinson ї) . In Alaska, Canada, Norway, Finland or northern Russia, on a clear night, a greenish glow is often seen in the sky, known as the "Northern Lights." ... Auroral light is produced at a height of about 100 km (60 miles) when fast electrons, arriving from space, slam into atoms and molecules of the atmosphere. ...

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• Solar Energetic Particles
• Spacecraft Observing Earth's Space Environment
• Chronology of Magnetospheric Exploration

... HST . ... Data . ... HST Overview . ... Instrument Handbook . ... Use of ACQ/IMAGE mode automatically records and downlinks an image taken after the centroid is determined and HST is moved to that position. ... However, only point sources within about 0.5 arcsec of the aperture center have essentially all their light imaged, and so the photometric interpretation of a COS image can be inherently complex. ... For information on imaging strategies with COS see chapter 6 of the COS Instrument Handbook. ...

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• Observing Faint Targets
• The Hubble Deep Field: Observing Strategy
• Chapter 7:  Observation Strategies

... ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Facilities . ATNF facilities . ... Australian Square Kilometre Array Pathfinder . Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... ATCA . ... Visiting Parkes radio telescope . Visiting Australia Telescope Compact Array . ... Parkes radio telescope webcam . ...

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• PPTA Wiki | Observing / Details
• ATNF Colloquium
• Relationships between Galactic Radio Continuum and H Emission

Next: Radial velocity of the Up: Optical spectrum of IRAS04296 Previous: Observations and spectra reduction . ... However, molecular emission features are only very rarely observed in the optical spectra of PPNe. ... On the other hand, it is well known that cometary nuclei spectra show prominent Swan band emission. In both spectra of IRAS04296 we have discovered strong emission in the (0;0) and (0;1) bands of the Swan system of the molecule. ... Now consider the case of IRAS04296. ...

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• Fabry-Perot Interferometer: Gallery Old
• The spectrograph design and the observing procedure

... NICS will be the only infrared instrument for the first light of the TNG; as a consequence, we decided to incorporate a sufficient degree of operation flexibility by providing the instrument with six different observing modes, three aimed at imaging and three at spectroscopy: . ... It will be possible to use the narrow band filters as order sorters; this will allow to perform high resolution long-slit spectroscopy in the wavelength ranges covered by the available narrow band filters. ...

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• CHIANTI atomic database

... Galaxies 99 Cosmic background with model of cloudy interstellar medium Yu. ... Figure 1: Averaged spectrum of the cosmic background I f in frequency range 0.25 200 MHz for the Galactic poles. ... First interpretation of the cosmic noise background spectrum at broad band frequency range 0.25 200 MHz with a model of the cloudy interstellar medium ISM is presented here. ... Synthesized background spectra I f for regions of the Galactic poles at the frequency range 0.25 200 MHz is presented in Fig. ...

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• http://www.gao.spb.ru/english/publ-s/viii-rfs/p087.pdf

... Exposure Time Calculator (ETC) . ... ESO - Public Surveys . ... the recommended values to use for DIT, . ... Detector on-chip integration (DIT): seconds. to your chosen value - a separate page gives recommended values to use for DIT - for modes 1 and 2 below you may wish to start with the maximum recommended values as these will minimize the effect of read noise (a total object exposure of Y secs with DIT=X secs will produce Y/X lots of read noise) and give you a lower limit on the time needed. ...

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• Observing with VISTA
• VISTA - Visible and Infrared Survey Telescope for Astronomy

... 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. ...

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• Observing ? Amateur Astronomers Association of New York
• Observing Events ? Amateur Astronomers Association of New York
• High Line ? Solar Observing ? Amateur Astronomers Association of New York

... Tonight's Sky . ... Observing . ... Sky this Month . ... Astronomy for Kids . ... Sky Guide . ... What types of energy are produced when matter and antimatter annihilate each other? ... The kind of energy released during such a collision depends on which matter and antimatter particles are involved and how energetically they collide. Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

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• What produces the "blue flash" during sunset? | Astronomy.com
• If neutron stars don't produce energy from fusion, like normal stars, how can
• When the Sun produces a coronal mass ejection, is the blast of sufficient force

... 1999 . I полугодие . 2000 . ... 2001 . ... 2002 . ... 2003 . ... 2015 . ... Последнее обновление: 28/12/2015 ...

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• HD965
• Detection of polarized radiation sources with unusual spectral characteristics

NMW survey overview . Access image archive . ... The New Milky Way survey aims to detect bright (V<13.5) optical transients near the Galactic plane using an automated wide-field (8x6 deg.) system capable of surveying the whole Milky Way area visible from the observing site in one night. ... All images obtained during the transient search survey are available online (please use the image archive access form ). ... Images per field: . ... Images per night: . ... Milky Way imaging time: . ...

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... MOTIVATION !Operations at observing sites should have quick and reliable access to the data, therefore observing sites are provided with their own local database server. ... SERVICE MODE OPERATIONS Standard service mode operations: !OBs produced by investigators are submitted to Garching. ... OBs moved to the operational database at Garching are replicated to the operational database at the observing sites by the same mechanism used for standard service mode Obs. ...

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• ESO - Observing with ESO Telescopes
• ESO - How is the sky spectrum for OFFSET data produced?
• ESO - The Seventh NEON Observing School

... Fitting the observed dependence includes calculations of the polarization cross-sections averaged over particles orientation and size distribution, their normalization and the comparison of obtained dependencies with Serkowski's curve representing observational data for a chosen star. ... Variations of the polarization factors with wavelength are shown in Fig. 16 for homogeneous spheroidal particles with PF orientation. ... The distinction between prolate and oblate spheroids is also clearly seen. ...

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• Silicate minerals
• Wavelength dependence

... The following charts/text are intended as tools for monitoring the Type Ia supernovae ( SNe ) event visually or photographically (utilizing telescope equipped CCD equipment).The files include: A replication of The Type Ia SNe , V- magnitude (with data point checks from other cited references)and color index (B-V) templete (to indicate a general color-related trend of the type Ia ... I believe this might help alleviate some of the problems involving the making of acceptable amateur light curves...

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• Supernova Observing Form.
• Contributions by amateurs: SN1996bk.

Emission Line Diagnostics in a ``No UV Bump'' Quasar PHL909 Smita Mathur, Belinda Wilkes, Martin Elvis and Jonathan McDowell Abstract PHL909 is a quasar with unusually low ultraviolet luminosity (blue bump strength C UV=IR = \Gamma0:20 compared to an average value of 0:4 (McDowell et al. ... The intrinsic continuum of PHL909 ( i.e. as seen by the BELR ) may thus be similar to the `standard' continuum, with a big blue bump, reddened along the line of sight. ...

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• Magnetospheric Emission From Isolated Pulsars
• Rotation Periods of PMS Stars
• The X-Ray Galactic SNR Catalog

... The Westerbork Synthesis Radio Telescope (WSRT) in the Netherlands has been used to survey a section of the galactic plane at a radio frequency of 327MHz. ... Intensity data from the seperate epochs were combined, and the resulting images mosaiced to produce a single image of the entire survey region. ... The WSRT 327 MHz Galactic Plane Discrete Source Catalogue . ... It is available as a unix compressed Postscript file [164 Kbytes] and an ASCII text file [339 Kbytes]. ... Postscript [160 Kbytes] . ...

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• Up-date RC-sources Spectra
• Emission-line galaxies
• Planning your observing run

home resources > links . SEARCH ASP SITE: Match ALL words Match ANY word . AstroShop . ... ASP Educational Resources . General Observing . Central Bureau for Astronomical Telegrams . ... I. R. Poyser Telescopes . ... Sierra Stars Observatory Network (SSON) . ... Slooh Online Observatory . ... Telescopes in Education . Telescopes Reviews . Backyard Observatories . Ash Observatory . ... Home Dome . ... home | ... education | resources | ... astroshop | ...

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• ASP: Low-Level Observing
• ASP: Guest Observer
• ASP: Up, Up, and Away