... HST . ... HST Overview . ... Changing Programs & Resolving Problems . ... Reference Information on Instrument Performance The following table summarizes the useful wavelength range for each of the first-order gratings of GHRS. ... The following figures illustrate the resolving power as measured for each of GHRS' gratings. ... The nominal design specification for the GHRS was R = 20,000 for the first-order gratings, but in fact one can exceed a resolving power of 25,000 at virtually all wavelengths. ...

Next: Order Definition Up: Echelle Reduction Method Previous: Retrieving demonstration and . ... That is the mapping between the space wavelength, spectral order and the space sample x , line y in the raw image. ... Sections and describe the solution of this mapping. The second step in the reduction, described in Section , is to estimate the image background. ... In the rest of this Section the algorithms used in each step of the reduction are described. ...

ST-ECF Instrument Science Report WFC3-2005-07 Ground tests of the WFC3 NIR grisms S. S. Larsen, H. Bushouse, J. R. Walsh March 2005 ABSTRACT The fundamental parameters of a slitless dispersing element are the geometrical configuration of the spectral orders, the dispersion relation relating pixel offset to wavelength and the sensitivity of each order. Based on thermal vacuum tests, the performance of the WFC3 near-IR G102 and G141 grisms has been assessed. ... WFC3 IR Grism Modeling and Rotations. ...

XMM-Newton Science Analysis System Page: 1 rgscombine August 16, 2005 Abstract Combines a list of spectrum les to create one combined spectrum le, and the corresponding list of response matrices and background spectrum, to create one nal response matrix and background spectrum le, for a paticular RGS instrument and spectral order. ... A list of response matrix les, as produced by rgsrmfgen or rgsproc. A list of background spectrum les as produced by rgsspectrum or rgsproc for TOTAL spectra. ...

... Staff . Research staff . ... Star formation . ... Historical highlights . Historical research . ... GIANO opens a new window on stellar and planetary astrophysics . ... During its commissioning in July 2012, spectra of the sky and of luminous stars have been taken with GIANO. ... The results are published on Astronomy & Astrophysics 2013 (in press): " GIANO-TNG spectroscopy of red supergiants in the young star cluster RSGC2 " led by Livia Origlia (Principal Investigator) and 21 co-authots. ...

... Science Users Information > Libraries > telbib information . ... Observing with ESO Telescopes . ... ESO Annual Reports . ... Statistics derived from the ESO Telescope Bibliography include only papers based on data from telescopes and instruments for which observing time was recommended by the ESO OPC (Observing Programmes Committee). telbib is compiled by scanning the major astronomical journals for scientific papers that contain any of the ESO-defined keywords (e.g., telescope and instrument names...

Astronomical Data Analysis Software and Systems VII ASP Conference Series, Vol. 145, 1998 R. Albrecht, R. N. Hook and H. A. Bushouse, eds. VLT Data Quality Control P.Ballester, V.Kalicharan, K.Banse, P.GrosbЬl, M.Peron and M.Wiedmer European Southern Observatory, Karl-Schwarzschild Strasse 2, D-85748 Garching, Germany Abstract. ... Taking the analogy of speed control on a motorway we can describe the system as a device (radar) collecting measurements of the system performance (passing cars). ...

... The ARC echelle spectrograph records the entire visible and near-IR spectrum in one exposure on a 2048 x 2048 SITe CCD chip with 24 micron pixels, with a resolution of 30,000. (2.5 pixels) . ... CCD is a SITe TK2048E back illuminated CCD . CCD is a 2048 x 2048 pixel array . ... Field of View: Available slits (Observing Specialist installable): 1.6" x 1.6" , 1.6" x 3.2" (default), 1.6" x 4.7", 0.9" x 0.9" (pinhole) . ... 31.6 grooves/mm, blaze angle b = 63.5 deg (nominal), or tan b = 2 . ...

... The spectrum is reversed left to right. ... Starting line IDs Line identification in order 26 (x reversed ) Channel Wavelength Calculated Discrepancy Line # 166.3593 8478.3584 8478.3613 0.0029 1 258.5106 8490.3066 8490.3213 0.0146 2 500.5818 8521.4385 8521.3926 -0.0459 3 912.9249 8573 ... 0.0547 4 1178.5211 8605.7764 8605.7803 0.0039 5 1299.3500 8620.4600 8620.4209 -0.0391 6 1698.4974 8667.9404 8667.9492 0.0088 7 line identification in order 34 (x reversed ) Channel Wavelength ...

All teams have to inform the Olympic Coordinating Council (OCC) and the Local Organizing Committee (LOC) about their participation not later than the dates determined by the Acting Statutes/Regulations on the International Astronomy Olympiad , send applications and pre-applications in time. ... For the countries, starting their activity at the International Astronomy Olympiad (see the Supplementary Instructions N 3 ), the requirements for the short report are not strong. ... Personal data for visas. ...

the atoms includes descriptions of the telescope, its components and instruments, as well as detailed measurements. the reports are indexed as shown below. as there is often overlap between categories, a memo may appear under more than one category. the memos are referenced by year-number (i.e. 99-01), the number assigned in the order the memo is received. please note the date of the memos; information contained in the memos may have evolved over time. atoms directory: . ...

HEAD 2011: Poster 10.05 Project Tanagra: Stellar Flares in Chandra High-Resolution Spectra Jennifer Posson-Brown, Vinay Kashyap, Steven Saar & Jeremy Drake (Harvard-Smithsonian Center for Astrophysics) Abstract We introduce Project Tanagra: Timing Analysis of Gratings Data, a uniform study of archival Chandra gratings observations of active l ow-mass coronal stars. ... See Kashyap et al. 2002, 2011 and Saar et al. 2011.) ... High resolution spectra from MEG and HEG first order, and ze roth order. ...

TEST AND REGISTRATION . USER'S GUIDE . ... 1.3 T&R Query Selection Criteria/Registration Data Entry 4 . 1.3.1 Character by Character Data Entry 4 . 1.3.2 Character and Wildcard Data Entry 4 . 1.3.3 List of Field Values Data Entry 4 . ... 2.3 T&R Test Requirements Specification Queries 12 . 2.4 T&R Detailed Test Results Queries 13 . ... T&R MHS Access 23 . 4.1 T&R Query Operations Using MHS 23 . ... APPENDIX A: Fields Allowing "List of Field Values" 25 . ...

... ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australian Square Kilometre Array Pathfinder . Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . ... Visiting Parkes radio telescope . Visiting Australia Telescope Compact Array . ... Fig. 3 ( a ) shows how wavelength gradients (or phase effects) are evident from a ring pattern of atmospheric OH emission lines across the TTF field. ...

This module provides for the customization of HTTP response headers. ... This module provides a directive to control the sending of HTTP headers. ... Header . ... Syntax: Header set|append|add header value . ... Module: mod_headers . This directive can replace, merge or remove HTTP response headers during 1xx and 2xx series replies. ... set . The response header is set, replacing any previous header with this name . ... The response header is appended to any existing header of the same name. ...

... The project assumes creation of an international space observatory - the interferometer "Earth - Space - Space" in order to perform of astronomical investigations in millimeter, submillimeter and infrared regions with extremely high sensitivity (to a few nanoJanskies units of flux density in continuum spectrum) and extremely high angular resolution (to a parts of microsecond of arc or, possibly, nanosecond). ... radio-interferometric channels of the system "Space - Space", region 0.2 - 3 mm; . ...

... Both sets of objective transmission gratings consist of hundreds of co-aligned facets mounted to supporting structures on 4 annuli (one for each of the four co-aligned mirror pairs) to intercept the x rays exiting the HRMA. ... The two sets of transmission gratings, attached to the mounting structure are shown in Figure . ... An individual facet has 0.43-m-thick gold grating bars with 50% filling factor and 9920- period, resulting in 1.15-/mm dispersion. The HRC-S is the primary LETG readout. ...

... 8.633400E-4 1) This may be read into IDL using the procedure ucles_read, file , w, f file : string : : in : name of file containing data w : array : (2048, nord) : out : wavelengths for each order f : array : (2048, nord, narr) : out : fluxes in each array 2) The next step is to remove the gross continuum shape using the procedure ucles_norm, w, f, fn, fs w : array : (2048, nord) : in : wavelengths for each ... 3) Define a standard wavelength grid for the entire spectrum....

... Donate to Support Science Literacy . ... 2016 Annual Awards . The ASP is accepting nominations for the organizationтАЩs national annual awards which recognize special achievements in astronomy research, technology, education, and public outreach. ... Shop the AstroShop . ... The Astronomical Society of the Pacific (ASP) is accepting nominations for the organizationтАЩs national annual awards which recognize special achievements in astronomy research, technology, education, and public outreach.. ...

Peremennye Zvezdy ( Variable Stars ) 32 , No. ... We report on a new episode of decretion disk formation in the IGR J06074+2205 system. ... From a study of three HeI lines, the rotational velocity of the star was determined as km/s. After five years of spectroscopic monitoring of IGR J06074+2205 (Reig et al. 2010), a reversion from emission to absorption of the H line and hence disappearance of the equatorial disk was reported. ... Reig P., 2011, Astrophys.& ...