... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Parkes radio telescope . ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ... Total Magnitudes of Virgo Galaxies. ... Spanning 8th to 18th mag. ... Next Section: Bright-end consistency checks . ... Previous Section: Intermediate galaxy sample (14th-12th . ... This latter distance was set as the point at which the surface brightness of the galaxy would fall to б mag.arcsec -2 if the . ...
Each receiver has a turret position to place the horn at the focus. ... current . 14may04 (02may04 survey) . ... sbn rcv . ... 14feb04 horn survey . ... 13feb04 (13 feb04 survey) . ... sbn . ... mod14/sbn/mar03 . ... survey feb04. mod15/may04 . ... horn move,survey,model may04 . ... horn move, survey feb04 . ... horn move,survey,model may04 Notes: . ... After the may04 surveys, sbn and lbw were not moved in the x direction (za) because there was no room in the hole in the turret floor. home_~phil ...
Next: The Stellar Population in Up: NICMOS Science Previous: NICMOS Coronagraphic Surveys-Preliminary Results . ... Searching around young stars . ... We are using NICMOS to search for very low-mass stellar and sub-stellar companions around nearby, young, main-sequence stars. ... NICMOS, coronagraph, young stars, brown dwarfs . ... We present images of a possible companion, probably a low-mass M star, to the star HD102982 which demonstrates our ability to detect substellar objects. ...
... With the FORS1 instrument of the ESO VLT, we have performed during the 2007 apparition of 133P/Elst-Pizarro quasisimultaneous photometry and polarimetry of its nucleus at nine epochs in the phase angle range 0 - 20 . ... Geometric information about the dust tails of 133P/Elst-Pizarro. ... The most logical explanation of the almost absent coma and the narrow dust tails is low nucleus activity and the small terminal expansion velocity of the dust grains after release by the nucleus of 133P/Elst...
... Oke (AJ, 99, 1621, 1990) has provided absolute spectral energy distributions covering the wavelength range 3200 to 9200A in AB magnitudes for 25 stars. ... The reduced magnitudes are tabulated at 1A intervals from 3300 to 4700A and at 2A intervals from 4700 to 9200A. Comparison of the fluxes with those determined elsewhere showed that Oke's absolute magnitudes are systematically brighter by 0.04 mag. The magnitudes and fluxes plotted have been corrected for this effect. ...
... The telluric features redward of 6700 A have been removed from the accurate spectro photometric standards of Hamuy et al. to permit more reliable relative and absolute spectrophotometry to be obtained from CCD spectra. Smooth яuxes from 3300 to 10500 A are best determined by dividing the raw spectra of all objects taken in a night by the raw spectrum of a "" smooth оо spectrum star before deriving the instrumental response function using the revised standard star яuxes. ...
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Ссылки http://www.mso.anu.edu.au/~bessell/FTP/Oldspectrophotometry/aa_paper_on_spectrophotometry.pdf -- 231.5 Кб -- 29.11.2004 Похожие документы
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STAR FIELDS Newsletter of the Amateur Telescope Makers of Boston Including the Bond Astronomical Club Established in 1934 in the Interest of Telescope Making & Using Vol. ... 9 October 2000 This Month's Meeting.. ... Dr. Donahue described the work done on solar observing from the early 1900's to today. ... See details in September's Star Fields THE ANNUAL MEETING of the AAVSO (the American Association of Variable Star Observers) will be held Wed-Sun October 25th-28th in Waltham, Massachusetts. ...