There is often dust associated with ionized regions. Compact HII regions usually have associated dust from a molecular cloud in which the massive star is being "born". ... For such stars the dust is not produced by the star, and a variety of dust features are observed. The planetary nebulae also usually have associated dust from the previous stage of evolution where they were either carbon stars or M-type giants. ... The feature near 11.5 microns in the IC 418 spectrum may be due to SiC dust. ...

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. ...

... Science . ... Science Users Information > Data Handling and Products > Data Reduction FAQ > The response curve leaves residual instrument features in my science. ... Observing Facilities . ... Observing with ESO Telescopes . ... Science Data Products Forum . ... Science Archive Facility . ... ESO Data . ... ESO Data Access Policy . ... ESO Science Newsletter . ... To can be avoided by flat-fielding the flux standard star spectrum with the same flat field as is used for the science data. ...

... 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. ...

Next: Amorphous magnesium silicate Up: Examples of data contained Previous: Examples of data contained . ... We have used the infrared optical constants of forsterite contained in the database for calculating the absorption cross sections of spherical and non-spherical particles in the Rayleigh limit (see Fig. The spectra are obtained by averaging the cross sections calculated for the three different crystallographic directions. ...

... HOME . ... Richard J. Edgar, Project Scientist . DXS, the Diffuse X-ray Spectrometer instruments were flown on the STS-54 mission of the Space Shuttle Endeavour in January of 1993. ... A Summary of the First Results from the Diffuse X-ray Spectrometer Experiment . ... In January of 1993 the Diffuse X-ray Spectrometer (DXS) instruments flew on the STS-54 mission of the Space Shuttle Endeavour. ... The DXS x-ray spectrum from the diffuse background in the constellations of Puppis and Auriga. ...

We present broadband photometry in the optical, near infrared and sub-millimetre, and mid-infrared spectrophotometry of a selection of carbon stars with optically thin envelopes. ... Beside the emission features at 11.3 \mu m due to silicon carbide grains in the circumstellar environment, many of our mid-infrared spectra show an emission feature at 8.6 \mu m. All the observed spectral energy distributions exhibit a very large far-infrared flux excess. ...

Ground-Based Mid Infra-Red Observations of Nearby Starburst and AGN Galaxies Bo jan Nikolic , Paul Alexander, Garret Cotter and Malcolm Longair Astrophysics Group, Cavendish Lab, Cambridge, U.K. Marcel Clemens Universita degli Studi di Padova, Italy Abstract. We present preliminary results of recent spatially resolved mid infrared (Mid-IR) spectroscopy with the MICHELLE instrument on UKIRT of NGC 7469, observed as part of a larger programme to study a sample of starburst and AGN in the Mid-IR. ...

... Tonight's Sky . ... The Magazine . ... Observing . ... Magazine . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Open cluster NGC 2818, spiral galaxy NGC 2964, and spiral galaxy NGC 2976 . ... Astronomy for Kids . ... Meade Instruments Corp. ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine . ...

... Meade Instruments Corporation . ... Choosing the Right Microscope . ... On most microscopes the specimen glass remains fixed while the microscope's objective lens and eyepiece move as a unit up or down to focus the image. ... Eyepieces of varying powers work with objective lenses of varying powers to yield a range of microscope magnifications. ... Magnification: The effective magnification of a microscope is determined by multiplying the eyepiece power by the objective lens power . ... about meade |...

... A concrete application is displayed step by step by the command: TUTORIAL/CLOUD . The data used for this example are CaII absorption features observed in the spectrum of SN 1986g in NGC 5128 (observer: S. d'Odorico, instrument: CASPEC). ... Sampling is 0.05? per pixel and the measured instrumental resolution, 17km/s. The final cloud model consists of 12 absorption doublets. The corresponding image includes both components K and H and has been convolved by a gaussian PSF of 0.22? (17km/s) FWHM. ...

Next: Infrared Imaging Data Reduction Software and Techniques . ... Economou, F., Jenness, T., Cavanagh, B., Wright, G. S., Bridger, A. B., Kerr, T. H., Hirst, P., & Adamson, A. J. 2001, in ASP Conf. ... ORAC-DR is a flexible and extensible data reduction pipeline suitable for both on-line and off-line use. ... The ORAC-DR pipeline design was presented previously by Economou et al (1998) and Jenness & Economou (1999) and makes extensive reuse of existing data reduction packages (Economou et al. ...

A Survey of Hidden Molecular Clouds in the Milky Way J.M. Hughes ad S.J. Gibson Western Kentucky University Star formation, a critical process within galaxies, occurs in the coldest, densest interstellar clouds, whose gas and dust content are observed primarily at radio and infrared wavelengths. ... Through a comparative study, we find substantial dark molecular hydrogen that is not detected in CO emission. ... Identify cold atomic hydrogen emission clouds 21cm 2. ...

APO/GIFS Instrument Factsheet The Goddard imager and Integral Field Spectrograph (GIFS) has recently been commissioned on the APO 3.5 m telescope. This factsheet presents a high level overview of the GIFS instrument. ... GIFS Imaging The GIFS imaging mode is used for imaging science and target acquisition for the IFS mode. ... Imaging Mode pixel scale: 0.168"/pixel · Comparison to Other APO 3.5m instruments: The GIFS field of view is smaller than SPICAM, but the filter set is far more extensive. ...

... Under certain conditions, like those in the nucleus of a QSO, all atoms can be made to emit light at particular wavelengths. ... If that source is approaching the observer, the wave is squashed up onto itself making the wavelength shorter. ... This is redshift. ... You can see how the section of the QSO spectrum which we observe changes with redshift. ... We then see how far we had to slide the observed spectrum along the scale to make it match and that is the objects redshift. ... The 2QZ team . ...

3D NIR IFU spectrograph from MPE. CIRPASS on Gemini. COHSI on UKIRT. ... SINFONI NIR IFU spectrograph for the VLT (and here ). SPIFFI on the VLT. ... LUCIFER at Heidelberg. GNIRS on Gemini(and IFU ). ... NIRSPEC on Keck and at UCLA . ... Omega-Prime from MPIA, Heidelberg. ... Gemini instrumentation. ... UKIRT instrumentation ( Future Instruments ). ... NTT Deep Field ( SUSI optical images , SOFI infrared images ). ... Instrumentation Links * Gemini Project Links * Other IR Instruments ...

View Edit Attributes History Attach Print Search . ... Observing . ... PPTA timeline . ... Editing this wiki . ... RFI . This page is dedicated to identifying the types of RFI that you may encounter whilst observing for P456. ... To upload an image, click 'Edit' at top right, log on, and click 'Attach'. ... Then add a title, description, and the 'Attach' definition and save the page. ... View Edit Attributes History Attach Print Search - Page last modified on February 19, 2014, at 10:59 PM . ...

The problem of solar wind data correlation for the observations onboard several spacecraft is very important for three points of view: . ... This problem is studied now in detail by systematic determination of ion flux and ion velocity data correlations by INTERBALL-1 (IKI group), WIND and IMP 8 (both - MIT group). ... Solar wind plasma correlation lengths from IMP 8, WIND and INTERBALL-1. ... Correlation of solar wind observations onboard several spacecraft: INTERBALL-1, IMP 8 and WIND data. ...

... UA SCIENTIST & TEAM DISCOVER SURFACE FEATURES COVER TITAN (Science contacts: Peter H. Smith, (602) 621-2725; Mark Lemmon, (602) 621-1485; UA Lunar and Planetary Laboratory) . Scientists for the first time have made images of the surface of Saturn 's giant, haze-shrouded moon, Titan. ... About three weeks before Cassini's first flyby of Titan, the spacecraft is to release the European Space Agency's Huygens Probe to parachute to Titan's surface. ... Upper left: hemisphere facing Saturn. ...

Next: stecf.impol - Package Tasks Up: stecf.impol - an IRAF Previous: stecf.impol - an IRAF . All the instrumental set-up, such as filters, polarizers, rotation angles, etc. are read from the image headers. Many input images ( 3 < N < 64) can be processed. ... Output images can be rebinned to increase the polarization signal-to-noise per output pixel. ... Output error images have fully propagated statistical errors from the input error images. ...