... arXiv.org . astro-ph . ... Submitted: 2008-03-26 . With the aim of studying magnetic effects in time-distance helioseismology, we use the first-order Born approximation to compute the scattering of acoustic plane waves by a magnetic cylinder embedded in a uniform medium. ... We also show that, for arbitrary magnetic field strength, the Born approximation is not valid in the limit where the radius of the magnetic cylinder tends to zero. [2] oai:arXiv.org:astro-ph/0701578 [ pdf ] - 88707 . ...

adapted from Observe: Eclipses, published in 1979 by the Astronomical League and "Safe Solar Filters," by B. Ralph Chou, Sky and Telescope, August 1981) . ... Tape TWO pieces of film together into a sandwich, and tape this over the opening in the cardboard. ... The cardboard frame will act as a shade from the bright Sun, while you safely observe through the film sandwich. ... Undeveloped film is not safe. ... tape . ... At the end of one of the tubes, tape the aluminum foil, and make a tiny pinhole. ...

What is a Handler . ... mod_actions . ... A "handler" is an internal Apache representation of the action to be performed when a file is called. Generally, files have implicit handlers, based on the file type. Normally, all files are simply served by the server, but certain file types are "handled" separately. Apache 1.1 adds the ability to use handlers explicitly. ... The following directives will enable the send-as-is handler, which is used for files which contain their own HTTP headers. ...

At 08:32, Moscow Time, Soyuz TMA-14 descent vehicle returned to Earth. ... Russian cosmonaut G. Padalka (commander of ISS-19/20, commander of Soyuz TMA-14) and NASA astronaut M.Barratt (flight engineer of ISS-19/20 and of Soyuz TMA-14) completed their mission to the International Space Station (ISS) under the program of Expedition ISS-19/20, and a spaceflight participant, Canadian citizen G. Laliberte has completed his mission under the program of the 17th visiting mission. ...

Rastorguev А.S. "Astronomical Distances" (Lecture course for postgraduates, 2009-2016) . Part 1. ... Trigonometric parallaxes of stars. Moving clusters distances. ... Photometric distances: general approach. Normal stars as "standard candles". ... Main Sequence fitting or distance scale of star clusters. ... Moving photospheres technique. Cepheid distance scale and P-L relations. RR Lyrae distance scale. ... Globular clusters luminosity function. ...

Astrophotography Forum Message . ... Post . ... Purus Astromechanik . ... Post Message | ... I have such clockdrive and I use it normally with a ccd camera or with a Meade DSI and a camera lens as you can see in the post in my blog http://alphecca.blogspot.com/2010/07/ecco-lattrezzatura-utilizzata-per-la.html . ... www.astronomy.net . About Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

VIEW OUT OF THE WINDOW FROM ALBUQUERQUE, NEW MEXICO, USA . The winter started early here with severe snow storms in November and December. ... But this winter we had so many storms, food had to be air-lifted by the Air Force, to feed farm animals in the countryside. The weather began to get much better in January. Now it is cool and sunny. ... New Mexico is usually very dry, . ... This altitude, coupled with the dry sunny climate, results in very cold nights and cool days in the winter. ...

. Prague, August 16, 2006 . Present classification : Suggested: . SN, SNI, SNII SN (to avoid introducing the current complex classification) AM AM (including XM from X-ray variables), DQ (intermediate polars) . UG, UGSS, UGZ UG, UGSS, UGZ UGSU UGSU, UGWZ (WZ Sge type, extremely long supercycles, large amplitudes), UG_ER (ER Uma type, short supercycles and normal cycles, small amplitudes; ideas of a better abbreviation are welcome) . CATACLYSMIC VARIABLES . AND OTHER STARS WITH OUTBURSTS (CONTINUED)

... August, 31st -- the command on switching on of the second onboard hydrogen maser has been given. ... At the same day (August 31st) for the functioning checking, all the scientific devices and units of the focal container have been switched on: the shaper of heterodyne micro-wave frequencies, the micro-wave signals selector, the block of pulse calibration, the control and analysis block (BUAS-F), four termostats of receivers on 18 and 92 cm. ... There are no remarks to the devices operation. ...

... 2. ui , i- , : 5 ui = ( - sin cos i cosi - cos i sini T ), i (1) i ­ i- OYZ; i ­ i- OYZ, i = 225 - 90 i, i = 1,.. ... 6 max ( L1 , L2 ) nmax = min ( L1 , L2 ) ( nmax + 1) , nmax = min ( L1 , L2 ) max ( L1 , L2 ) - min ( L1 , L2 ) - . ... 3) D1min1 , D1min 2 7 mi n1min1 , n2 n1 , min 2 min 2 n1 , n2 , Dlast . ... 11) OX OXY : nxy = nijk - ( nijk , ez ) ez , (12) ex , ey , ez ­ . ... nxy , ex ) ( , ( nxy , ex ) < 0 -arccos nxy (13) OX OXZ : nxz = nijk - ( nijk , ey ) ey . ... 450 B2 (+225 ) B1 (-225 )...

... 3rd ISCC) Kunming, China, Oct. ... THIRD INTERNATIONAL SYMPOSIUM OF CHRONOBIOLOGY AND CHRONOMEDICINE Kunming , China , October 7-12, 1998 REGISTRATION FORM This form should be typewritten Participant Title (tick): Prof. _ Dr. _ Mr. _ Mrs. _ Miss _ Ms. _ Surname: _______________ ... ____________________ Given name(s): ______________________ Country: _____________________ Nationality: ________________________ Registration fees: Participant Companion N of companions Amount U.S . $300 ...

... Bad Astronomy . ... Bitesize Astronomy . ... Mad Science . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Area of science: Astronomy . ... Stellar property requirements for supernova vs. nova (mass, nearby celestial bodies, stellar composition, etc.) ... A nova is actually a binary system, usually a normal star like the Sun and a small dense white dwarf. ... One is very similar to a nova: a binary system with a normal star and a white dwarf. ... 2008 Phil Plait. ...

Asteroids, Comets, Meteors (2008) 8010.pdf SPECTRAL SIGNS OF CARBONACEOUS CHONDRITIC MATERIAL ON (21) LUTETIA V.V. Busarev, Sternberg Astronomical Institute (SAI), Moscow University, Universitetskij pr., ... We have discovered considerable variations in the continuum slope and shape of the visible-range reflectance spectra of the asteroid with rotation in November 2004 (4/5, 5/6 and 7/8) and March 2006 (3/4). ... Resulting normalized (at 0.55 m) and smoothed reflectance spectra are shown in Fig. ...

... The circumnuclear GASEOUS disks are often decoupled from the circumnuclear stellar disks and are even stronger inclined to the outer disk planes; in fact, we have found a considerable `population' of inner polar rings. Inner gas polar rings are found as in spiral galaxies with the massive outer gas disks co-planar to the main symmetry planes (e.g. NGC 2841, Sil'chenko et al. 1997, and NGC 7217, Sil'chenko & Afanasiev 2000) as well in many lenticular galaxies (Fig. ...

IMAGING PRODUCTS TM-1300 PROGRESSIVE SCAN HIGH RESOLUTION SHUTTER CAMERA Pr oduct Featur es · Very high resolution 2/3" progressive scanning interline transfer CCD imager 1300(H) x 1030(V) · 8/10-bit digital output for progressive scan (RS-422) · Real time, 12 frame/sec (20 MHz data clock) with SVGA display (47 frame/sec.) output · Full-frame shutter ....1/50 to 1/39,000 sec. ... Internal shutter speed mode. ... Digital output: 1-bit, 12 frame/sec. ... Memory mode: Digital output: 8-bit, 12 frame/sec. ...

... Астрономические наблюдения (Модераторы: LeMay , Александр Репной , Грудцын Алексей ) ? Полное солнечное затмение 29 марта 2006 . ... Ответ #200 : 30.03.2006 [17:52:18] ? ... Записан . ... Кстати попутный вопрос: 29 марта 2006 года на юге Ставропольского края наблюдалось полное солнечное затмение, через какой период времени оно будет наблюдаться в том же районе? Следующее полное солнечное затмение полоса полной фазы которой будет проходить через город Ставрополь состоится аж 31 мая 2375 года!! ...

... 2 Measurement of PMTs counting characteristics and selection of op erating p oint To select the operating point of the PMT, that is the optimal values of the high voltage supply and pulse discrimination threshold, the command run counting=hv value is provided in the program mass. ... Starting with the minimum voltage (say 550 V) run command run counting=550 for the measurement execution. ... It is recommended to take measurements for the set of values of 0.4, 0.6, 0.8, 1.0. ...

... For reliable estimation of the accuracy of asteroid CCD observations we usually consider from ten or more various NUMBERED MINOR PLANETS (NMPs) observed during several nigths per month (more then 50 positions). ... They can be considered as an indicator of accuracy of the CCD positional observations with given MPC code. ... For any NUMBERED minor planet the (O-C) values must be zero if the errors of observations and the errors of its theory are absent. ...

... Average effective wavelengths and band widths for various sp ectra Lyrae spectrum f flat k е 1014 Hz 5386 ± 18 4.66 ± 0.04 5714 ± 12 4.1 6234.5 ± 0.5 1.03 5372 ± 18 4.69 ± 0.04 eff 2 Optical Filter ID 1 2 3 4 a Fo c -6 10 erg/cm2 s 12.55 ± 0.10 11.04 ± 0.01 2.77 ± 0.004 12.63 ± 0.10 fo d 6 10 photons/cm2 s 3.40 ± 0.02 3.18 ± 0.004 0.87 ± 0.002 3.42 ± 0.02 Power-law eff f 2 е 5746 ± 317 6197 ± 253 6305 ± 31 5736 ± 316 spectra pl k 1014 Hz 3.70 ± 0.26 3.14 ± 0.16 0.88 ± 0.01 3.70 ± 0.27 Table 1. ...

Электронная библиотека астронома-любителя. ... архив RSN . ... Ru.Space.News: . Апрель 1998 . ... Дата: 28 апреля 1998 (1998-04-28) От: Alexander Bondugin Тема: Cassini Update - April 26, 1998 Привет всем! ... The web site also contains some audio files, including a recording of the Mode-S beacon which plays for 20 seconds. ... During the period 1998-Mar-21 to 1998-Apr-15, excellent signals have once again been received from the 145.826 MHz beacon. ... The 435.025 MHz beacon is normally off. ...