REPEATABILITY OF THE FOS G130H GRATING EXTERNAL WAVELENGTH ZEROPOINT ANURADHA KORATKAR and IAN EVANS Space Telescope Science Institute,3700 San Martin Drive, Baltimore, MD 21218 Abstract. Measurements of the position of the geo­coronal Lyff are used to determine the repeata­ bility of the G130H grating and the external wavelength zeropoint for the first time since launch. ... The 1oe repeatability of the wavelength calibration is 0.159 љ A (0.64 pixels or 39 kms \Gamma1 ). ...

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• HDF-S Data Products
• GHRS Instrument Handbook
• Wavelengths

Next: Data reduction Up: Spectral observations and data Previous: SAO 6m observations . Further follow-up spectroscopy was made during nights May 30 - June 4, 1995, using the Boller & Chivens spectrograph attached to the Cassegrain focus of the Calar Alto 2.2m telescope. ... The observations were complemented by standard star flux measurements, lamp exposures for wavelength calibration, dome flats, bias and dark frames. ...

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• Calar Alto 2.2m telescope observations
• Observations
• CCD observations and data reduction

A limit on the ultra-high-energy neutrino flux from Centaurus A Justin Bray For the LUNASKA collaboration Clancy James, Ron Ekers, Chris Phillips, Paul Roberts, John Reynolds, Rebecca McFadden, Ray Protheroe, Jaime Alvarez-MuЯiz, Justin Bray Outline: · Ultra-high-energy (UHE) cosmic rays neutrinos · Detecting UHE neutrinos · The lunar Cherenkov technique · Observations with the ATCA · Observations with Parkes · ASKAP and the future ... Detection Geometry Neutrinos are penetrating.. ...

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• ATNF Colloquium
• Reducing 3-mm ATCA observations
• Reducing a pulsar and cal observation.

... Previous: Pipeline Processing and Quality Control for Echelle Data . ... On-the-fly re-calibration of HST data (OTF) has now been available at the CADC and ST-ECF for about 18 months. ... The calibration can only be executed using the calibration reference files which are available at that time. ... On-the-fly re-calibration has another advantage for our archive sites: we only need to keep the raw data and calibration reference files on-line for the process to be automatic. ...

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• ETCs and Observations Simulation at the VLT
• Zero-Points of FOS Wavelength Scales
• A Test for Weak Cosmic Ray Events on CCD Exposures

Winer Observatory P.O. Box 797, Sonoita, Arizona 85637-0797, USA . ... Asteroid . ... Site . ... The evening of October 26, 2011, Mark Trueblood, Robert Crawford, and Larry Lebofsky used the Kitt Peak 2.1-m telescope to observe Near Earth Asteroid (NEA) 2008 QT3. ... single still jpeg frame . ... The National Optical Astronomy Observatory (NOAO) issued a press release concerning Morgan's work on Monday, November 21, 2011 and posted it on the home page of their web site . ... 2013 Winer Observatory. ...

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• Winer Observatory Command and Control

... This step is done mostly interactively and uses some basic ad-hoc IDL procedures, mainly for testing and checking of the consistency of the results.Once the observations have been selected and the count spectra extracted, the available spectra of each background level are accumulated. ... Average QUALITY such that QUALITY =0|1 Exposure times are added and the total is written in the EXPOSURE keyword of the header of the output FITS file. Finally, the CCFs are built from these templates. ...

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• Observation pane

Next: Results & Discussion Up: Coronal Hole Diagnostics out Previous: Introduction . ... The dates of the observations discussed here, their locations, pointing, slit sizes and exposure times are given in BTDW. ... Line fits are given by the dotted line. ... An estimation of the errors in the derived parameters was obtained using the GA-derived parameters as an input for a ``classical'' IDL-CURVEFIT procedure (Peter, 1999; Peter & Judge, 1999). ...

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• Armagh Observatory
• Observations with the Faulkes Telescope North
• Observations with the Faulkes Telescopes

... Observatory . ... Science . ... Science Users Information > Data Handling and Products > Data Reduction FAQ > How do I find out the exposure time for a given observation? ... Science Users Information . Observing Facilities . ... Paranal Facilities . ... Instrumentation Development . Future Facilities and Development . ... Observing with ESO Telescopes . ... Science Data Products Forum . ... Science Archive Facility . ... ESO Data . ... ESO Data Access Policy . ... ESO Science Newsletter . ...

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• Comet Halley
• ESO - The calibration data for my observations look strange. Can you confirm
• Data Flow System overview

P. Frisch - Warm partially ionized interstellar gas at the Sun . ... W. M. Goss - Time variations in small-scale galactic HI structure toward 3C138 . S. Stanimirovic - Does tiny-scale atomic structure exist in the ISM? ... T. Bania - The distance to molecular clouds via HI self-absorption . ... C. Heiles - Arecibo Millennium Survey statistics of magnetic field, column density and turbulence in the CNM . R. Crutcher - Magnetic fields in molecular clouds . ...

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• The CIMA Calibrated Pulsar Catalog Observation Mode
• Spectral Line Observations at AO

... A radio galaxy is a galaxy that emits an unusually big amount of energy at radio wavelengths. ... Inside of each galaxy with an active nucleus (radio galaxies are among them) there must be a system of a "central machine" responsible for the colossal amount of the emitted energy from radio to gamma ranges. ... Sometimes a radio source in an active galaxy may flare again if the needed conditions appear (a new portion of matter would fall into the furnace of the "central machine"). ...

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• Suppression of cooling by strong magnetic fields in white dwarf stars
• New data on the cpmplex field structure of chemically peculiar stars
• Speckle interferometry of magnetic stars

The target is a new candidate qLMXB found in the J1655 field of the ChaMPlane survey. ... Use SDSS u,g,r,i,z to take light curves continuously. 3-5min exposures. ... Skyflats: Take twilight skyflats starting shortly after sunset at around 6:00pm. ... Take the first Ha skyflats with adjusted exposure time (remember to turn the tracking on during exposure and off during readout). ... Take the first I filter skyflat with exposure time equal to 1/10 of the last Ha skyflat exposure. ...

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• Champlane Observation: Magellan/IMACS June 6-9, 2005
• Chandra Images for G000.1-00.1
• The Diffuse X-Ray Background

... Time calculated from Fermi GBM Trigger Time = 14:12:08.67 ( Connaughton, GCN 9230 ). 1% coincident with our start zero image time. 3x3 degrees around Swift XRT position . ... SUBJECT: GRB 090424 : MASTER-Net prompt optical limit DATE: 09/04/25 20:29:42 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs E. Gorbovskoy, V. Lipunov, V.Kornilov, A.Belinski ... Our observations results: ---------------------------------------------------------------------- Fermi GRB Trigg.* ...

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... Let us first find out which way -- rise in spectral resolution with some loss in the S/N ratio or increase in the S/N ratio with a fixed spectral resolution -- is better for the purpose of reduction of equivalent width determination errors. ... N -- number of counts for 1 ? ... line equivalent width, . ... Thus if the spectral resolution is managed to be increased (i.e. to decrease )without loss in the number of counts falling at 1 ?, the equivalent width measurement error is then proportional to . ...

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• RATAN-600 antenna
• Archive of observations of feed-cabine N1
• Radio sources identfification

The main steps in the reduction of NIR spectroscopic data are flat-field correction, subtraction of sky emission, wavelength calibration, correction for telluric absorption and correction for optical system plus detector efficency. ... Sky subtracted frames are corrected computing analitically the tilt angle from the instrumental calibration parameters or directly measuring it from the data. ... The same procedures are applied to the reference stars frames to obtain the calibration spectra. ...

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• Procedures for Observations
• Hubble Observations Shed New Light on Jupiter Collision
• The relationship between NSs and SNRs (Elba, June 1-4,1998)

The large magnetic cloud caused by coronal mass ejection at the Sun on January 6, 1997 came to the Earth at early morning on January 10 and continue to interact with Earth's magnetosphere till January 11 (see for example home page of this event prepeared by Dr. M.Peredo http://www-istp.gsfc.nasa.gov/istp/cloud_jan97/event.html ). ... During the days discussed here INTERBALL-1 satellite was in the magnetosphere (MS) near its dusk flunk - see the Fig. 1 for compearing. ...

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• Gauss and the Global Magnetic Field
• GRB observations
• The Direction Assigned to Electric Currents

Magnetic field measurements onboard the Interball Tail spacecraft are carried out by the FM-3I instrument which consists of two flux-gate magnetometers covering two different ranges: [-200, +200] nT and [-1000, +1000] nT. Besides scientific goals, the FM-3I experiment data is used to perform the attitude control of the Interball Tail spacecraft. ... August 22, 1995 . ... October 18, 1995 . Top of the page . ... Back to the Interball Home Page . ...

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• Gauss and the Global Magnetic Field
• The Direction Assigned to Electric Currents
• The Wind Spacecraft

Cosmic ray intensities (left) compared with predictions (right) from IBEX. The similarity between these observations and predictions as evidenced by the similar color regions supports the local galactic magnetic field direction determined from IBEX observations made from particles at vastly lower energies than the cosmic ray observations shown here. The blue area represents regions of lower fluxes of cosmic rays. ...

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• Magnetic fields, subatomic particles, etc., traveling in different directions

... They are concerned with Attitude Control System of the spacecraft, satellite visibility from tracking stations, limits on the satellite autonomous operations during the orbit, and needs for auxiliary operations with the spacecraft. ... Among the operational constraints the most important one is the number of programmed slews per orbit, which determines the maximum number of radio sources to be observed during one orbit. ... System temperature (K) . ... Progress of the RadioAstron Project in Pictures...

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• Departement of Quantum Astrophysics
• DPC Post-Observations Products
• Appendix B: Map of the Document

... 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

Nowadays at the Department the experimental and theoretical investigations, including astronomical and ionospheric observations, active experiments with space vehicles are taking place. ... Solar Corona physics and erruptive phenomenae. ... Stellar astronomy. ... The Department has organized and put into practice more then 50 expeditions for observation of Solar ecllipces, aurorae polaris, comets, meteor streams, controlled space experiments, and also for investigations of geophysical characteristics. ...

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• A computer controlled low light photometer for nightglow observations
• Solar Physics
• Observatory Lisnyky