. XMM-Newton Science Analysis System . omsource (omsource-1.15.5) [xmmsas_20070708_1801-7.1.0] . Meta Index / Home Page / Imaging Mode Photometry Window / Background Determination Controls If this is checked then the background will be determined from an annulus region on the image. XMM-Newton SOC/SSC -- 2007-07-09

type = ac_bkg fk5 ; annulus ( 359.954738, 62.307158, 22.22 , 55.55 ) # color = red srcid =XS02810B3_028 fk5 ; annulus ( 0.024147, 62.360659, 16.24 , 40.60 ) # color = yellow srcid =XS02810B3_016 fk5 ; annulus ( 359.964990, 62.347695, 14.44 , 36.10 ) # color = yellow srcid =XS02810B3_019 fk5 ; annulus ( 359.942620, 62.346935, 13.42 , 33.55 ) # color = yellow ...

... User Guide ] Task: ellint Purpose: Integrate a Miriad image in elliptical annuli. ... The integration is done separately for each image plane in the region included. ... They are the outer radius (arcsec) of the annulus; number of pixels in the annulus; the average (median) in the annulus; the rms of the annulus; the sum in the annulus normalized by the volume of the primary beam (if there is one); the cumulative sum for all annuli so far. Key: in Input image name. xyz images only. No default. ...

... NOTES: ; Calculates sky by median. ... Preferably, we'd like to use a simple ; weighting scheme for these pixels (like in IRAF) by taking a fraction ; of the pixel value equal to its fraction inside the aperture. ; would be slightly nicer if ... correspond to what ; ;- ; number of fields in output NOUT = 13 if keyword_set(zpt) eq 0 then zpt = 26.0 if n_params() lt 4 then begin print ,'apphot, image ,x,y, aprad ,(inskyrad),( outskyrad ),(output),' print ,' [badpix=],[zpt='+ strc (zpt)+'],[ ...

OBJECT_NAME CH*16 POS_X R F7.2 POS_Y R F7.2 RADIUS R F7.2 GAP R F7.2 ANNULUS R F7.2

Table 5.3 Parameter Notation and Units Parameters of the TC93 Electron Density Model Estimated Value Description Outer axisymmetric component n1 h1 ( cm-3 kpc ) h1 ( kpc ) A1 ( kpc ) F1 0.0165 0.88 20 0.4 Nominal electron density , n1; scale height , h1 Scale height Reference radius Fluctuation parameter Inner axisymmetric component n2 h2 A2 F2 ( cm-3 ) ( kpc ) ( ...

asnphot -- plot magnitude as function of subpixel position asnphot association . ... calnicb style association input file with list of images to be processed and co-added. istar . star to be used for the photometry. ... Calls "qphot" to perform photometry on the same star in each image of an association. ... The task requires that "alignasn" has been run on the association in order to define the stars to be used and in order to measure accurately the shifts between images. digiphot, qphot ...

... The standard science quicklook processing produces over a dozen sky maps at each downlink, and these maps are automatically searched for potential transient point sources. ... We have found that a heuristic modification of a formula derived by Li & Ma (1983) provides reasonably accurate estimates of p -values for point source detections even for very low p -value detections. ... Case 1u. The most straightforward approach uses the signal , where . ... To get a p -value, use . ...

... This file twosigma.dat 79 46186 The 2-sigma catalog -------------------------------------------------------------------------------- See also: VII/152: Einstein Medium Sensitivity Survey Catalog Byte-by-byte Description of file: twosigma.dat -------------------------------------------------------------------------------- ... Format Units Label Explanations -------------------------------------------------------------------------------- 1- 2 I2 h RAh RA ( 1950 ) of the ...

Peremennye Zvezdy ( Variable Stars ) 32 , No. ... We report on our photometric analysis of the poorly studied cataclysmic variable in Ophiuchus, 1RXS J174320.1-042953 (DDE 11). ... The long-term behavior of J1743-0429 shows that it is a probable magnetic cataclysmic variable (polar), with a large difference between its low and high states. The orbital period obtained from our observations is 0 0866, or 2 08, close to the lower boundary of the period gap of cataclysmic variables. ... Fig. ...

... The light baffles consist of the wind baffle that surrounds the telescope and doubles as a light baffle, the primary baffle that extends from the primary center-hole toward the secondary (left), the secondary baffle that extends from the perimeter of the secondary toward the primary (right), and the conical baffle that is suspended approximately halfway between the primary and secondary (middle). The wind baffle is covered with panels that are 25% porous to the wind. ...

... We have taken into account: dead-times of detectors, data gaps, VETO, detectors signal thresholds, precursor normalized counts/sec/ keV 10-4 10-3 0.01 0.1 1 peak normalized counts/sec/ keV 10-4 10-3 0.01 0.1 1 normalized counts/sec/ keV 10-4 10-3 0.01 0.1 1 tail peak SPI ACS 120000 100000 80000 1800 [counts/s] 1400 1000 600 200 500 400 300 200 100 0 precursor 140000 tail 2 2 0 0 ISGRI -2 10 100 1000 energy channel [ ... GRB 031111A 10 100 1000 energy channel [keV] Figure 2. ...

Educator's Guide to Eclipses . ... In a solar eclipse you observe the Sun (using only safe methods, of course). ... In a lunar eclipse you observe the Moon. ... Because of the geometry described below, you can only view a solar eclipse when the Sun is up, and the Moon is nowhere to be seen. ... Eclipses occur when the Sun, Earth and Moon line up. ... In a solar eclipse the Moon passes directly in front of the Sun. ... In a lunar eclipse the Moon moves into Earth's shadow. ...

MULTISCOPES . MULTISCOPE-EF . ... HOME . ... ABOUT LOMO . PRODUCTS . MICROSCOPES . ... SURGICAL MICROSCOPES . ... Home Products Microscopes Multiscopes UP-PH3 Upgrade Package . PHASE CONTRAST UPGRADE PACKAGES (UP-PH3 and UP-PH4) . The upgrade consists of the state-of-the-art C-PH N.A. 0.8 Phase Contrast condenser and three (UP-PH3: 10 X 0.30, 20 X 0.40, 40 X 0.65] or four (UP-PH4: 10 X 0.30, 20 X 0.40, 40 X 0.65, 100X1.25 Oil) EAP-Series Phase Achromatic objectives. ...

... Astrophysics Group . ... COAST Technical Details . ... The beam from each telescope passes through an aluminium tube, which serves to isolate it from the atmosphere, into the beam combining building. ... Inside the beam combining building the outer annulus of each light beam is separated and used in the acquisition and autoguider system. ... A simple algorithm is then used to detect the offset from the centre of the field, and this is corrected using piezo-driven mirrors at the back of the...

... 2005 May 6 . Hybrid Solar Eclipse . ... Explanation: April's spectacular geocentric celestial event was a rare hybrid eclipse of the Sun - a total or an annular eclipse could be seen depending on the observer's location. For Fred Espenak , aboard a gently swaying ship within the middle of the Moon's shadow track about 2,200 kilometers west of the Galapagos, the eclipse was total, the lunar silhouette exactly covering the bright solar disk for a few brief moments. ... About APOD | ...

PHYSICAL REVIEW B 77, 054509 2008 Spontaneous fluxon production in annular Josephson tunnel junctions in the presence of a magnetic field R. Monaco* Istituto di Cibernetica del C.N.R., 80078 Pozzuoli, Italy and Unita' INFM-Dipartimento di Fisica, Universita' di Salerno ... spontaneous production of fluxons in annular Josephson tunnel junctions during a thermal quench in the presence of a symmetry-breaking magnetic field ... R. Carmi, E. Polturak, and G. Koren, Phys. Rev. Lett. ...

... Астрофорум - астрономический портал ? ... Астрономическое оборудование и аксессуары (Модераторы: zlyden , Denk36 ) ? Супер а$ферика" от Vixen . ... Рейтинг: +747/-69 . ... Ответ #80 : 01.03.2006 [12:53:55] ? ... Записан . ... Рейтинг: +25/-1 . ... Рейтинг: +172/-9 . ... Рейтинг: +369/-27 . ... Ответ #89 : 02.06.2007 [17:21:32] ? ... Рейтинг: +269/-52 . ... Жизнь слишком коротка и хорошее небо слишком редко бывает, чтобы тратить его на плохом оборудовании. (с) Роланд Крисчен. ...

... Astronomers have been surprised by the emergence on the Sun of one of the largest sunspot groups of modern times. ... A sunspot's area is measured in millionths of the area of the Sun's disc. ... The current sunspot group is one of the largest seen since 1947, rivalling a group seen in 2001. ... The vertical magnetic field lines, deep below the sunspot, inhibit the transfer of heat from the general body of the Sun to the central region of a spot, resulting in the lower temperature of the umbra. ...

... Solar Eclipses in 2009 : . There are two eclipses of the Sun (an annular eclipse on January 26 and a total eclipse on July 21-22 ) in 2009. ... Annular Solar Eclipse . ... Annular Eclipse of the Sun on January 26, 2009 . ... Beginning of northern limit of umbra . ... Beginning of center line; central eclipse begins . ... Central eclipse at local apparent noon . ... Total solar eclipse . ... An annular eclipse occurs when the apparent disk of the Moon is smaller than that of the Sun. ... Umbra: . ...