... 2 XPOS pixels x-coordinate of centroided source centre . ... 5 RATE counts/sec Total measured source counts (after background subtraction) within default source extraction aperture (r=12 un-binned pixels), divided by exposure time. ... 7 BACKGROUND_RATE counts/sec Total estimated background counts (scaled by area ratio, from the background annulus) within default source extraction aperture, divided by exposure time . ... Filter WHITE is set to 6 pixels. ... Bit set integer value reason region colour...

... Observing . ... Solar Observing . ... April 3 (SUN) - Solar Observing, Central Park , Manhattan . ... APRIL'S SKY . ... Lecture Series at the American Museum of Natural History The Amateur Astronomers Association is proud to present an astronomy lecture series from October through May each year for our members and the .. ... The€аAmateur Astronomers Association of New York€аwas organized in 1927 to promote the study of Astronomy, emphasizing its cultural and inspirational value. ...

... We describe the optical morphological properties of the new 40 galaxies, derive the surface brightness profiles for 25 of them, and present the results of photometric decompositions of these profiles into a "bulge" (R 1/4 or exponential) and a disk component. ... Resolved, central compact sources are detected in about 50% of the galaxies. ... B. Irregular/exponential bulges typically host central compact sources. ... Many of the galaxies which host compact sources contain a barred structure. ...

... The processing of these associated images presents new challenges to the HST data processing pipelines, which heretofore operated only on single images. ... Stage 1 (CALNICA) calibrates individual exposures without information from other members of the association. ... Stage 2 of calibration (CALNICB) only operates on associated images that have previously gone through CALNICA processing, and creates combined images for each distinct (non-overlapping) pointing within the association. ...

A Wideband Upgrade for the Australia Telescope Compact Array Dick Ferris & Warwick Wilson, CSIRO ATNF Overview The available signal bandwidth on the Australia Telescope Compact Array (ATCA) is to expand from 128MHz to 2GHz. ... 2GHz 4k channels Basic Configuration 2GHz 4k channels Simple Zoom 2GHz MFS and Zoom Modes During continuum observations the large number of frequency channels will usually oversample the u-v plane, the exception being low frequency observations involving the SKA antennas. ...

My research interests are focussed on the theory and modelling of accretion processes as well as star and planet formation mechanisms. I am particularly interested in the stability properties of accretion discs, the generation of MHD turbulence and associated angular momentum transport, disk - planet interactions and the origin and characteristics of jets and winds from accreting systems . ... These results have been published in Salmeron & Wardle, 2005, M.N.R.A.S., 361: 45-69. ...

Next: The STScI NICMOS Calibration Up: No Title Previous: CONICA: The high resolution . The STScI NICMOS Calibration Pipeline . Introduction . ... Dark Current Subtraction . ... Input Data . ... Scalar Background Subtraction . 2-D Background Subtraction . ... Status and Goals of the NICMOS Calibration Plan . ... Photometry . ... Photometric Performance of NICMOS . ... NICMOS Photometry. ... ST-ECF Grism Spectrum Software for NICMOS Grism Data . ... Analysis . ... STScI NICMOS Software . ...

... Ignacio Ugarte Urra's PhD thesis topic is the investigation of coronal bright points. In his first paper (in collaboration with Gerry Doyle and Maria Madjarska) he investigated the formation, evolution and decay of a coronal bright point via a spectroscopic analysis of its transition region counterpart and the evolution of the underlying magnetic bipole during 3 days of almost continuous observations. ... In general the bright point has a radiance 4 times higher than that of the network. ...

Results of analysis . ... IAA EOP Service . ... EOP series are regularly submitted to the IERS, and also are available at the IAA EOP Service page. EPN coordinate time series . EUREF Permanent GPS Network (EPN) coordinate time series is computed from analysis of available EUREF weekly solutions. ... Second solution is based on independent combination of individual EPN Analysis Centers' solutions . ... USNO GPS Timing Operations . ... GPS Time Series . ... EPN : European Permanent GPS Network . ...

... Several attempts to discover the FICN signal in VLBI nutation series made during last years failed. ... We investigated several VLBI CPO series by means of spectral and wavelet analysis. It has been shown that there are several periodic signals with close amplitude around the expected FICN period without any prevailing one that can be reliably associated with the FICN. ... DATA ANALYSIS We analyzed several CPO series obtained in IVS analysis centers by means of spectral and wavelet analysis. ...

Weaving together Astronomy+Statistics+Computer Science+Engineering+Intrumentation, far beyond the growing borders . ... Posts tagged ?Frequentist? ... Continue reading ?[ ... Tags: Bayesian , Frequentist , Ping Zhao , question for statisticians , weighted mean . Category: Bad AstroStat , Fitting , Frequentist , Stat , Uncertainty | 18 Comments . ... Category: arXiv , Quotes | Comment . ... Category: arXiv | ... Category: Bayesian , Fitting , Frequentist , Jargon , Stat , Uncertainty | ...

... Optical: Nebulosity offset to NE. X-ray: Non-thermal shell, confused by the Vela SNR, with central source, and possible associated pulsar. Point sources: Central X-ray source, with optical nebula, and possible associated pulsar. ... ADS . ... 1998, Nature, 396, 142. -ray observations. ... 1999, ApJ, 519, L177. ... Chandra of central X-ray source. ... Optical observations of central source. ... 2005, ApJ, 619, L163. -ray observations. ... Deep optical observations of compact X-ray source. ...

Next: Combining Flat Fields Up: Preparing Your Calibration Previous: Combining Bias Frames . Similarly to the bias combination one can obtain an average dark current frame. However, one should consider whether the dark correction should really be applied: one needs a reasonable number of dark frames in order not to degrade the S/N, and obviously this takes telescope time. ... In that case, provided a good linearity of the CCD, one could do with the subtraction of an average dark frame. ...

Please enter the lightcurve file name and period search parameters: . Lightcurve file: . ... Apply the Heliocentric correction and convert all dates to Terrestrial Time (TT)? ... Also, the Heliocentric correction cannot be applied to such lightcurves. ... This period search service is also available at the mirror sites: Mirror 1 , Mirror 2 , Mirror 3 , Mirror 4 . You may download the latest source code distribution and install the period search service at your own web server. ...

Next: Observing the Old-Fashioned Way (Gui-Free Observations) Up: Spectral Line Appendices Previous: OLD Basic Analyz Routines For use with data taken BEFORE March 6, 2000 . This appendix contains example analyz sequences used to look at HI spectra. ... Additionally, if you have not run analyz before, instruction (2) should read: If you have not, instruction (3) should read: . ... 7) redln < rec < n : This first stores the individual ON/OFF - 1 data dumps into registers 100 - 100+ - 1. ...

... Centaurus A: The Galaxy Deep Inside . ... Explanation: Deep inside Centaurus A , the closest active galaxy to Earth, lies ... another galaxy! ... The ISO data maps out the dust in what appears to be a barred spiral galaxy about the size of the prominent nearby spiral M33 . ... Publications with keywords: Centaurus A - active galaxy - agn - barred spiral galaxy . Publications with words: Centaurus A - active galaxy - agn - barred spiral galaxy . ... Nearby Spiral Galaxy NGC 4945 . ...

... The object is remarkable because of its low estimated mass and age and because it is associated with a mid-infrared source, an indication of a surrounding dusty disk. Based on the comparison of our spectrum with similar spectra of field M-dwarfs and atmospheric models, we obtain revised estimates of the spectral type, effective temperature and luminosity of the central object. ...

... ESO is building what will be the World's largest optical telescope array, The Very Large Telescope (VLT). The VLT Project organisation is responsible for the design and construction of the Unit Telescopes, including enclosures, optics, adapter-rotators and coating unit. ... Unit Telescopes Overview - This page is outdated, an update is in process. ... Secondary mirror (M2 Unit) - This page is outdated, an update is in process. ... Coating Unit - This page is outdated, an update is in process. ...

... Cross-shaped galaxy ZGC 2315+03 (Fig.1) has been described by Zwicky (1971) as ``post-eruptive or the result of the crossing of a compact galaxy through an edge-on spiral'' . This object was included in the Polar-Ring Catalog (C-71) by Whitmore et al. (1990) as a possible candidate for Polar-Ring Galaxies (PRG). ... One of them is galaxy 'disk' and the other is 'polar-ring'. ... The facts against the polar-ring nature of ZGC 2315+03 can be summarized as follows: . ...

LARGE-SCALE PHENOMENA AT THE SUN ASSOCIATED . WITH FILAMENT ERUPTIONS OUTSIDE ACTIVE . ... Considering the 12.09.1999 event as an example, we analyze manifestations of large-scale disturbances associated with coronal mass ejections (CMEs) caused by filament eruptions outside of active regions. ... The filament eruption occurred in relatively weak magnetic fields, but it was accompanied by larger-scale phenomena than flare events do. ...