... Near Infrared Camera and Multi-Object Spectrometer Instrument Handbook for Cycle 17 > Chapter 9: Exposure TimeCalculations > 9.1 Overview: Web based NICMOS ETC . 9.1 Overview: Web based NICMOS ETC . ... The imaging NICMOS WWW ETC is documented in an Instrument Science Report (Arribas, NICMOS ISR-2004-002 ). ... Additional information on the ETC and its structure can be found in the Instrument Science Reports (ISRs) posted on the STScI NICMOS Instrument Web page. http://www.stsci.edu/hst/nicmos/ . ...

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• WFC3 Instrument Handbook
• WFPC2 Instrument Handbook Update
• Performance

... 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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• On the problem of high spectral resolution observations of faint objects

... These plots show spectra (either count rates or ux) and the background count rates. omgrismplotplot can be used to display a single spectrum or multiple spectra, produced by omgrism. The input FITS les must contain net count rates, background count rates and the associated errors. The spectra must follow a regular binning scheme (i.e. equispaced wavelength bins). omgrismplot allows the user to input the device type (e.g. Xwindow, Postscript, ...) for output. ... 7 Output Files 1. ...

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• http://xmm.vilspa.esa.es/sas/6.1.0/doc/omgrismplot.ps.gz
• http://xmm.vilspa.esa.es/sas/6.5.0/doc/omgrismplot.ps.gz
• http://xmm.vilspa.esa.es/sas/7.0.0/doc/omgrismplot.ps.gz

True Color Image Gallery: Galactic SNR | ... Data for each remnant are organized into the sections listed below. ... Chandra Counts and Fluxes: are given in 3 energy ranges. ... Other images are in narrow bands selected to illustrate the spectral morphology of that particular remnant and differ from remnant to remnant. Any image can be downloaded in GIF, PS, or FITS format. ... Survey Missions: Depending on the remnant; shows IR, visual and radio images. ... Chandra Supernova Remnant Catalog . ...

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• The Diffuse X-Ray Background
• *qpspec* - Time Resolved Spectral Fitting
• ChaMP Initial Data Release - X-ray

... This paper describes the main algorithms used by the Einstein Level One processing to create the exposure masks and the background maps for Einstein IPC images, and how these algorithms were recreated in the IRAF environment. Our goal was to recreate the algorithms used by the Level One Processing to create exposure masks and background maps for Einstein Image Proportional Counter (IPC) data (cf. sections 2.5 and 2.7 of Harnden et al. ...

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• SDImager: An Imaging Tool for Single Dish Observations in AIPS++
• The Sliding-Cell Detection Program for Chandra X-ray Data
• ADASS 2003 Conference Proceedings

... The J, H and K bands are characterized by a bright background, such a background is mainly due to the emission of atmospheric lines and of thermal radiation. ... If the source cover a large fraction of the slit, spectra off-source must be observed to adequately sample the sky background. ... The on chip integration time (time spent in each position of the slit) must not exceed 40 seconds in J and H bands and 60 seconds in K band. ... We suggest a sequence of 10 for each elementary integration time. ...

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• NEAR recorded on 23 January 1998(frame 1)
• Arcetri Infrared Activities THE FIRT NEAR INFRARED PHOTOMETER
• Introduction

... 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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• General description of the database

... In most astronomical observations the image intensity consists of contributions from both object and sky background. Depending on the complexity of the field and the type of object, different methods are used to estimate and subtract the background intensity. ... Non--linear filters are often used to remove stellar images and other sharp features (see Section ) while extended objects are very difficult to eliminate automatically. ...

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• Errors in the Steady State and Quasi-SS Models
• SAO 6m observations
• Results of observations

. Next: A Quick Look Up: Spectral-Line Observing at AO Previous: THE SOURCE LIST . This section describes using the AO-Control GUI - a graphical user interface (GUI) to the Arecibo observing/datataking system - for spectral line observations. If you would like more information on the general properties of the GUI, go to http://www.naic.edu/ aoui . Subsections . A Quick Look . The Details . Useful Stuff . koneil@naic.edu

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• ON/OFF (Position Switching)
• The Arecibo User Manual for Astronomers
• NAIC Arecibo Observatory Lidar Capabilities Page

... Copyrightї1997 Bob Yen (byen@ix.netcom.com) (http://www.comet-track.com/hb/hb.html) . ... Information on Comet Hale-Bopp for the Non-Astronomer Hale-Bopp rotates about twice a day (3/14/97) . ... The Comet Observation Home Page was been selected to receive the Griffith Observatory Star Award for the week of February 2 - 8, 1997 for excellence in promoting astronomy to the public through the World Wide Web. ... Typically, about 1,000 individual users/computers access this page every day. ...

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• This i well known

.

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• Foundations of the Big Bang
• Physics 410/510 Observational Cosmology
• Taylor and Francis Page

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Though made without the aid of a telescope, his careful observations together with those of others and his physical intuition, lead to a revolution in our understanding of the mechanics of the solar system. The new heliocentric theory which he propounded maintained that the Earth moved around the Sun once per year and rotated on its own axis once per day. ... Tycho's Observatory built in 1584 at Uraniborg in Denmark. ...

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• First Observation of a Close Earth-Approaching Near-Earth Asteroid Using the
• Observations and Data Reduction
• Armagh Observatory

... Flux density at 1 GHz (/Jy): 19 . ... Notes: This is the remnant of the SN of AD 1006. ... Optical: Filaments to the NW, with broad H component. ... Point sources: The background Schweizer Middleditch star is near the middle of the remnant. ... van den Bergh 1976, ApJ, 208, L17. Optical observations. ADS . ... X-ray spectroscopy. ... Schweizer & Middleditch 1980, ApJ, 241, 1039. ... Optical spectroscopy of the Schweizer Middleditch star. ... Optical spectroscopy. ... 2013, A&A, 552, A9. ...

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• PPEUC Programme - Cosmic Microwave Background Workshop
• Measurements of anisotropies in the Cosmic Microwave Background Radiation on
• G263.9-3.3

relax \@ writefile {toc}{\ contentsline {section}{\ numberline {1}Introduction}{1}} \@ writefile {toc}{\ contentsline {section}{\ numberline {2}The Sample}{2}} \@ writefile {toc}{\ contentsline {section}{\ numberline {3}Observations and Results}{3}} \ newlabel {eqn:ffaspectrum}{{1}{4}} \ newlabel {eqn:peakfreq}{{2}{4}} \@ writefile {toc}{\ contentsline {section}{\ numberline {4}Discussion}{4}} \ Five type-1 sources and four type-2 sources are shown in upper and lower panels, respectively. ...

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• How to reduce Hydra Cals
• Links to Manual Sections and to External Information.
• Observations Data Reduction

... SITE SAFETY PLAN . ... Prepared by: Ben Harris, Site Safety Officer . ... INTRODUCTION . SECTION I . APO SAFETY POLICY . ... RESPONSIBILITIES . ... 2.2 Site Safety Officer . ... REPORTING SAFETY CONCERNS . ... 4.3 General Requirements . 4.4 General Responsibilities . ... Figure 1 - Notice of Incident-State of New Mexico . ... 5.3 National Fire Protection Association Codes (NFPA) . ... 6.1 Background . ... OFFICE SAFETY . ... Figure 9 - Back Safety Tips . ... PERSONAL PROTECTIVE EQUIPMENT . ...

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• Untitled Document
• ARC 3.5m | TRIPLESPEC
• ARC 3.5m | GIFS

... Discovery of the Radiation Belts . ... Early US magnetospheric research was mainly focused on the Earth's radiation belts, discovered by Van Allen and his colleagues in the spring of 1958. ... McIlwain showed experimentally that very high particle fluxes would overwhelm the counter and produce zero counts, and there is little doubt that further analysis of Explorer 1 data would probably have led to the discovery of the radiation belt. ... through the radiation belt. ... 1958; Van Allen, 1981]. ...

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• Brief History Introduction
• The Geiger Counter
• Solar Energetic Particles

A computer controlled low light photometer for nightglow observations. Hardware units of portable photometer for low light measurements, especially night glow emission is described. ... Interface card contain three channels of 24 bit counter, 4 channels of 12 bit ADC and the buffer bus for the controlled motors of the altazimuthal fork mounting and filters wheel, the position encoders. ... Where N( ) is output signal photometer generated input light flux F( l ) . ... PMT # . 599 . ...

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• WARNING MISSION: Background
• TELEVISION CAMERA TVC
• Practical Astrophysics

Next: Gravitational Wave Background from Previous: Galactic Gravitational Wave Background . ... It is intuitively clear that at frequencies above the critical ones for our Galaxy, one will detect rare bright jerks produced by coalescing white dwarfs   (at a rate of 1 per 100 year) and NS (at a rate of 1 per - year) in our Galaxy, against a background of the extragalactic stochastic GW. ... Firstly we consider GWB from close individual galaxies, and then will discuss overall extragalactic GWB. ...

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• Critical Frequencies and Gravitational Wave Detector Halfwidth for
• The Radiopulsar PSRB1259-63 - a Probe in the Stellar Wind Plasma
• Gravitational wave background from nearby galaxies

Next: A wavelet Up: No Title Previous: Introduction . Figure: Data characterization using wavelets. The time axis is common to the raw data and the wavelet map (background), for which the vertical axis is analogous to an inverse frequency (Section 10). The Mexican hat wavelet (Section 3) used for the background wavelet map (Section 5) measures the magnitudes of local maxima (blue-grey shades) and minima (yellow/red shades) as a function of time and duration. ...

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Journal of Atmospheric and Solar-Terrestrial Physics Manuscript Draft Manuscript Number: ATP1021 Title: comment on the paper by Dalin , Pertsev and Romejko Significance of lunar impact on noctilucent clouds ( revised version) Article Type: Research Paper Section/Category: Keywords: Noctilucent clouds moon influence mesosphere Manuscript Region of Origin: Abstract: a critical review of the paper by Dalin , ... Reference: Dalin, P.A., N.N. Pertsev, V.A. Romejko. ...

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