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• Astronomy HyperText Book
• THE HUBBLE LAW JAVA APPLET

STEP INTO THE BLUE - MEADE INSTRUMENTS PRODUCT GUIDE . ... Meade 4M Community . ... Meade Instruments . ... Telescopes . LX850 Series . ... Meade's revolutionary LS LightSwitchтДв series of telescopes use advanced technologies to do what no other consumer telescopes have done before: take all the hassle out of using a telescope. ... Coronado Accessories . ... Weather Stations . ... Slim Line Series . ... Dealer Locator . ... Become a Meade Dealer . ... Slim Line Weather Stations (3) . ...

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• Weather Stations - Products

... 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
• INTRODUCTION to Spectral Line Observing at AO
• Spectral-Line Observing at AO

... The narrow emission-line template spectrum of NGC 5548 has for the first time enabled us to isolate the narrow and broad UV emission-lines and thereby determine firm estimates for the intensities of the broad emission-lines for both the low-state spectrum, and the average HST/FOS archival spectrum obtained from the intensive monitoring campaign undertaken by "AGN Watch" on April 19th 1993, when the continuum was a factor of ~4.8 brighter. ... huizinga@stsci.edu . ...

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• Emission Line
• Absorption line spectra of the UV bright z=2.4 QSO HE 1122-1649
• Spectroscopy of Planetary Nebulae

... An interactive IRAF task for the analysis of Extreme Ultraviolet Explorer ( EUVE ) emission line spectra is presented. The line flux in extracted spectra may be measured by multiple techniques, including fitting individual lines. ... To aid in identifying lines, the positions of known lines may be marked on the spectrum during the fitting process. Also, model EUVE spectra may be constructed and overlaid using plasma emissivities and source emission measures supplied by the user. ...

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• EMSAO: Radial Velocities from Emission Lines in Spectra
• RVSAO 2.0 - A Radial Velocity Package for IRAF

... The new emission line galaxies are listed in Table 2 containing the following information: . column 1: The object's IAU-type name with the prefix HS. ... This was not corrected in the figure shown in Appendix A. HS1214+3801 : This is seemingly a supergiant H II -region at the very rim of the nearby edge-on disc galaxy (SA(s)cd) NGC 4244 (V hel = 224 kms -1 and B T =10.88). ... To check this option one needs a detailed map of the NGC 4244 velocity field including HS 1214+3801. ...

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• Line parameter measurements
• The Hamburg/SAO Survey for Emission-Line Galaxies
• Spectral survey of Case emission-line galaxies with the 6m Russian telescope

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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• http://hea-www.harvard.edu/QEDT/Papers/STlines.ps
• http://hea-www.harvard.edu/PINTofALE/papers/kdps_1998_aas192_8201_txt.ps.gz
• PINTofALE EXAMPLE SESSION: via Dracia

... We study the variation of the line width and electron density as a function of height above two coronal holes from forbidden spectral lines of Si VIII. The spectra were obtained with the Solar Ultraviolet Measurements of Emitted Radiation spectrometer flown on the Solar and Heliospheric Observatory spacecraft. ... The electron density shows a decrease from 1.1 10 8 cm -3 to 1.6 10 7 cm -3 over the same distance. ...

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• Spectrum v1 - Examples
• Armagh Observatory
• J.G. Doyle, Research Astronomer

... Here some data observed on the 6m telescope with IFP installed in the OLD focal reducer are presented. ... Mkn 3: velocity field . ... NGC 5252: [OIII] image . ... NGC 5252 was observed 23 Feb. 1998 in the [OIII]5007 emission line with CCD TK1024 as detector. ... We observed the ionized gas velocity fields of the spiral galaxies with two purpose. ... Restored velocity field of NGC 157 in the reference frame rotating with the pattern speed overlaid on the Ha image of the galaxy . ... NGC 4100 . ...

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• Results scientific researchs 2
• Atlas and list of identified lines
• SCORPIO: IFP Gallery

Next: Spectral Line Processing and Up: Spectral Line Data Reduction Previous: ATCA Spectral Line Correlator . ... The ATCA allows you to observe two frequency setups simultaneously ifsel allows you to load just one of them by setting ifsel=1 or ifsel=2 . ... The RPFITS file does not contain the rest frequency of the spectral line observed, so you need to give this at some stage during data reduction - the earlier the better. The rest frequency can be entered (via restfreq , in GHz) in atlod . ...

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... Science . ... Science Users Information > Data Handling and Products > Data Reduction FAQ > I have a very low S/N spectrum and/or just emission lines, how can I reduce my CRIRES spectra? ... Science Users Information . ... Observing with ESO Telescopes . ... Science Software . ... ESO-MIDAS . ... Science Data Products Forum . ... Science Archive Facility . ... ESO Data . ... ESO HST Image Galleries . ... ESO Data Access Policy . Science Activities . ... Science Staff . ... ESO Science Newsletter . ...

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• ESO - Tools to Correct for Telluric Absorption and Emission Lines
• Coronal Fe XIII Emission Line in CN Leonis | ESO United States
• ESO - How can I correct telluric absorption lines in the Reflex science end