... 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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• A Checklist of Things to Have Before You Observe
• INTRODUCTION to Spectral Line Observing at AO
• Observing with the 305-m Arecibo Radio Telescope

... Posts tagged ?BEHR? ... A great advantage of Bayesian analysis, they say, is the ability to propagate the posterior. That is, if we derive a posterior probability distribution function for a parameter using one dataset, we can apply that as the prior when a new dataset comes along, and thereby improve our estimates of the parameter and shrink the error bars. ... Suppose you have two data sets, D1 and D2, hypotheses H, and background info (model, etc.) ... Comment . ... 7 Comments . ...

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• The AstroStat Slog missing data
• The AstroStat Slog Schafer
• The AstroStat Slog Rubin

... There is an opportunity to perform O-C calculations for objects which are absent in the data base of the package. Such objects can be described by orbital elements or by initial coordinates and velocities. ... On pressing Edit file button user has a possibility to look through the list of object elements or their coordinates and velocities to add or to change it. ... For example, the designations of objects in the list can occupy the last position in each line. ...

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• ENGAMPLE

... ATNF Home . About ATNF . ... About ATNF overview . ... Governance overview . Australia Telescope Steering Committee . ... Parkes radio telescope . ... Information & tools for observers . ... Online Resources . ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ... Recently, the OGLE team have reported a clear quasar microlensing signal in Q2237+0305. ... From light-curve fitting, I unambiguously set the source size of Einstein Ring radius as a conservative limit. ...

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• LMC HII Region Luminosities versus Observed Ionizing Stars
• Australia Telescope National Facility
• Spectral Line Processing and RPFITS files

... 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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... The scheduling routines assist in creating an observing list (stored in the startable) from scratch or from another list stored on disk, and computing the visibility of the stars in a specific night and array configuration. The date of observation is taken from the variable date , and the array name from the variable systemid . If these are not defined, defaults are used for date (the next night) and for array (NPOI). ... addstar , stars _char Add one or more stars to the startable. ...

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• Homepage of Christian A. Hummel
• ESO - Paranal Science Operations: End of Missions Report
• ESO - The Origin and Fate of the Sun: Evolution of Solar-mass Stars Observed

spaceweb@oulu.fi - last update: 20 September 1998, 2020 UT (RR) . Traveling Convection Vortex (TCV) is a name given to a specific type of daytime magnetic impulsive events observed by high-latitude ground-based magnetometer arrays. Since the most likely source for TCVs is the solar wind , they are considered to be important processes in transfering energy from the solar wind into the magnetosphere . ... For example, one AMPTE Lithium release in the solar wind caused a TCV event . ...

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• ULF waves [Oulu]
• Spacecraft Observing the Sun and the Heavens above
• The Sun

PRE-COSTAR FOS APERTURE THROUGHPUT VARIATIONS DUE TO OTA FOCUS CHANGES D. J. Lindler and R. C. Bohlin FOS Instrument Science Report CAL/FOS-102 93 August ABSTRACT Since the throughput of the FOS entrance apertures depends on the HST focus, estimates of absolute fluxes from observed count rates require a correction for focus effects. ... The 4.3 arcsec aperture throughput observed by a 1.43 arcsec high diode array varies by approximately 10% over this range. ...

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• Observing Faint Targets Near Bright Objects
• Using PSFs for Image Restoration
• Better HST Point-Spread Functions: Phase Retrieval and Blind Deconvolution

... 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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• Polar-Ring Galaxies
• Magnesium-aluminium oxide (spinel)
• Circular polarization: change of sign

lsst.tcc љ 1.2.2-3-g89ecb63 . ... Files . ... python . ... axis . coordConvWithFP.py . ... 22 љ def coordConvWithFP (fromCoordSys, fromPVTPair, fromPxPMRadVel, fromDir, toCoordSys, obj, inst, zeroPM, useGSWavelen): . 23 љ """!Convert a coord from one coordinate system to another . ... 35 љ @param[in] obj object block computed at desired desired TAI date of conversion . ... 50 љ obj = tcc.base.Obj(obj) # make a copy so I can change obj.site if useGSWavelen . ... tcc.axis.rotFromObs.rotFromObs . ...

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• MILT Description
• lsst.tcc: tcc.axis.obsFromRot Namespace Reference
• lsst.tcc: tcc.axis.instFromObs Namespace Reference

M1 image More About M1 Nice Color Picture . ... M16 image More About M16 HST image . ... M31 image More About M31 Nice Color Picture . ... M42 image ; M43 image More About M42/43 Nice Color CCD Picture . M51 image More About M51 Color Image of M51 M51 Supernova . M57 image More About M57 Nice Color CCD Picture Very Deep M57 Image . ... M81 image More About M81 M81 Supernova Ultraviolet Image of M81 More about Ultraviolet Imaging . M82 image More About M82 M82 False Color M82 True Color . ...

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• Astro-2 and the UIT Experiment

... A technique allowing automatic representation by a relatively small number of independent parameters based on the principal component analysis of data sequences is presented. ... In recent years the spectrum of observed astronomical data can be characterized as greatly varied. ... In this instance, the problem of initial description and classification of newly-observed data becom