... xs qpspec source qpoe file (xdata$rp110590n00.qp): xdata$rp110590n00.qp[ time =(1606720.00:1607479.00)] source region descriptor ():c 6947 9325 2' background qpoe file ( ): bkgd region descriptor (): a 6947 9325 3' 4' root name for output files [root_obs.tab, etc.] (): arlac_1 ds: 0 file : arlac_1_obs.tab scale: 0.00 mission: 20 seqno: CA110590P.N6 instrument: ROSAT_PSPC sub-instrument: 1 no. pha channels: 34 mean off-axis angle of events (arcmin ...

. Home . Structure of Data . Description . Catalog . Publications . VO . ЮБ 2000 . 11:49:18.0 . ЮД 2000 . -62:13:47 . l . 295.764 . b . -0.226 . diameter . 5.0' . (m - M) 0 . 11.72 0.17 . distance . 2200 180 pc . E(B - V) . 0.98 0.08 . log(t) . 8.6 0.05 . (J, J-H) isochrone VOTable . 2MASS data VOTable . Developed by the Team . Send us your questions or feedback

... The NICMOS data reduction and calibration pipeline employs file formats and software architecture techniques that are new and different from what has been used for previous HST instruments. This paper describes the FITS file format used for NICMOS data, which includes error estimate and data quality arrays for each science image, and describes the approach used to associate multiple observations of a single target. ... This group of five data arrays is called an image set, or ``imset'' for short. ...

... Plates and Drilling . ... Results . ... In January of 1992 we drilled and measured a set of test plates testing several techniques including drilling with a carbide twist drill and drilling followed by reaming [R. Owen, et al., unpublished]. ... The test plates were 3.5" diameter 1/8" thick disks of aluminum. 50 holes were drilled in each test plate, 10 each in five concentric circles. ... This diameter was the optimal value for our plug plates determined from the 1/92 drilling tests. ...

1927: 5.21 inches . 1911: 4.91 inches . 1986: 4.65 inches . ... 5 years: 1919 -- 1924: 15.60 inches . 10 years: 1911 -- 1921: 27.05 inches . 15 years: 1912 -- 1927: 36.72 inches . 20 years: 1911 -- 1931: 46.83 inches . 1993: 0.00 inches . 1975: 0.00 inches . 1965: 0.00 inches . ... 5 years: 1988 -- 1993: 3.23 inches . 10 years: 1989 -- 1999: 11.05 inches . ... 15 years: 1909 -- 1919: 23.25 inches . ... 20 years: 1901 -- 1921: 53.32 inches . To the Weather Page . ...

March 1988 # T0=2452500.4573 P=0.8142833 (KJ.M. Kreiner, 2004, Acta Astronomica, vol. 54, pp 207-210) #Phase Flux Error 0.899 0.57 0.26 0.908 0.49 0.18 0.915 0.28 0.19 0.926 0.50 0.20 0.933 0.54 0.16 0.943 0.43 0.16 0.954 0.47 0.21 0.959 0.34 0.17 0.966 0.30 0.16 0.976 0.09 0.19 0.984 0.10 0.16 0.993 0.30 0.16 1.001 0.55 0.20 1.010 0.61 0.16 1.023 0.23 0.16 1.027 0.57 ...

... OEM COMPONENTS . ... OEM OPTICAL COMPONENTS . ... Objective, Plan Achromatic, 4 X 0.12, BF . ... Objective, Flatfield Achromatic, 20 X 0.40, BF . ... Objective, Flatfield Achromatic, 60 X 1.00-0.70, Oil, Iris, BF . ... Objective, Flatfield Achromatic, 100 X 1.25, Oil, BF . ... Q-Plan™ Achromat Objective, 2.5 X 0.08, BF . ... Q-Plan™ Achromat Objective, 50 X 1.0-0.70, oil, iris, BF/DF . ... Q-Plan™ Achromat Objective, 100 X 1.25, oil, BF . ... Q-Plan™ Achromat Objective, 100 X 1.30, oil, iris, BF/DF ...

... Printed in U.S.A. Measuring the Balmer Jump and the Effective Gravity in FGK Stars Michael S. Bessell Research School of Astronomy and Astrophysics, Australian National University, Mount Stromlo, Weston, Australia; bessell@mso.anu.edu.au Received 2006 October 17; accepted 2007 May 18; published 2007 June 21 ABSTRACT. ... Synthetic fl spectra for [Fe/H] p 2.5, 5750 K, and log g p 4.5, 3.5, 2.5. ... Synthetic spectra divided by an 11,800 K BB for [Fe/H] p 2.5, 6500 K, and log g p 4.5, 4.0, 2.5. ...

... Its perihelion would occur on April 1, 1997, at which point the comet would be only 0.92 astronomical units from the Sun, just within the orbit of Earth. ... Taken in April 1993, the photo showed the comet over 13 astronomical units from the Sun, well beyond the orbit of Saturn. ... Hale, as in Comet Hale-Bopp, has written a book, Everybody's Comet (available through the ASP Catalog) and coordinated an Internet project, "Hale-Bopp: Live in the American Classroom." ... Anatomy of a comet. ...

... Tonight's Sky . ... News . Observing . ... Dark energy update . ... What's more, because of dark energy's destructive effects, a universe that contained much more dark energy than what we observe would almost certainly by unsuitable for the evolution of life. ... Dark energy and the accelerating universe . ... Only registered members of Astronomy.com are allowed to comment on this article. ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

... Bad Astronomy . ... Bitesize Astronomy . ... The Nine Planets . ... Hey, it's either this or one of those really irritating PayPal donation buttons here. ... I have a snack from April 1998 that gives a brief intro to these peculiar objects , but briefly, brown dwarfs (or BDs for short) are objects that are a little less massive than "normal" stars, but bigger than any planets we currently know about. ... A star forms from a collapsing gas cloud. ... One more point: is a BD a star? ... 2008 Phil...

... AstroImageJ (AIJ) .. ... Reads and writes FITS images with standard headers . ... Provides a time and coordinate converter tool with capability to update/enhance FITS header content (AIRMASS, BJD, etc.) ... Creates color images and with native ImageJ processing power . ... AstroImageJ_Updater . Update operation now updates AIJ version number in Info.plist CFBundleVersion and CFBundleShortVersionString (MacOSX only) . ... AstroImageJ is ImageJ with astronomy plugins and macros installed. ...

Next: A Coronagraphic Search for Up: NICMOS Science Previous: NICMOS Science . ... A search for previously unknown low-mass (giant planet and brown dwarf) companions to stars in the solar neighborhood, and circumstellar dust disks around main sequence stars by direct coronagraphic imaging has been undertaken by the NICMOS Instrument Definition Team (IDT). ... The problem in the target acquisition process resulted in degraded pointing and target centration performance for these observations. ...

... The spectrum of the brightest star, our Sun, shows several dark gaps perpendicular to the flow of it’s colours (figure 1). These so called spectral absorption lines where discovered in 1802 by the English scientist William Wollaston. ... Some stars as Pollux show a spectrum similar to that of our sun with strong Ca II and Fe II lines, others as Sirius or Vega show strong absorption lines of hydrogen, others, as Mira show very complicated spectra due to molecular absorption lines (see figure 5). ...