Next: Artifacts Up: Computational Methods Previous: Estimation . The actual transformation of raw detector data to clean maps in intensity scale depends strongly on both the imaging and detecting systems. However, three typical steps can be identified, namely: detection and removal artifacts in the data, correction for non--linear effects or relative variations in sensitivity of the detector system, and correction for geometric distortions in the imaging device. ... Response Calibration . ...

... This paper describes distortion calibration procedures for the SOHO /LASCO-C2 Coronagraph, based on in-orbit data and extensive image processing methods. ... C2 suffers from moderate optical distortion, which must be corrected in order to properly locate the stars crossing its field-of-view (which are subsequently used for photometric calibrations), to retrieve critical attitude parameters, and to insure a correct overlapping of the region common to the C2 and C3 instruments. ...

Fermi s Gamma ray Pulsars . ... Traditionally identified and studied by observing their regular radio pulsations , two dozen pulsars have now been detected at extreme gamma-ray energies by the Fermi Gamma-ray Space Telescope . ... This gamma-ray all-sky map, aligned with the plane of our Milky Way Galaxy, shows the pulsar positions, with the 16 new Fermi pulsars circled in yellow (8 previously known radio pulsars are in magenta). ... NASA Web Site Statements, Warnings, and Disclaimers . ...

Next: Identifications and Efficiency Up: THE DEEP X-RAY RADIO Previous: Source Classification . ... For some sources which did not have NVSS positions before the time of optical observations, arcsecond positions from the Texas survey (Douglas et al. 1996) and NED (typically based on VLA data) were used. ... All X-ray/radio sources without counterparts on the survey plates were imaged at either the KPNO 0.9m or the CTIO 0.9m telescopes. ... Previously Identified Sources . Sample Properties . ...

Next: References Up: No Title Previous: Observational data and reduction . ... A minor loss of information is due to the overestimation of the scattered light in the region of and to the broad emission lines and . On the diagrams are shown the blue-shifted absorption lines and the interstellar diffusion bands. ... In Table 1 are given only emission lines. Questionable features and the lines that fell within the gaps are not included in it, question-marks are for unreliable identification. ...

Dear PALFA consortium members, Another smooth day of observing, with detections of J1928+1746 (PALFA#1), a much brighter re-detection of B2020+28, a few single-pulse candidates, and not much else to report from our quicklook. ... Update databsae with fill_observed.py Quicklook Notes: * Plot order bug: displays candidate 1, 10, 2, 3, .. Plot display bug: If the last candidate (#9 for now) is filtered out, then the single pulse plot is also filtered out. ... No other obvious quicklook candidates. ...

. Home . News . Gallery . Events . Twitter . Press Releases . Links . Contact Us . Calendar . Press & Web Coverage . Previous . Next . List . Taken on the 24th November by John McConnell. It shows the ISS and an unidentified satellite . Friday, 2 January 2009 23:14 . International Year of Astronomy, Ireland National Node . [Back To Top] .

... In order to obtain a quantitative estimate of the accuracy and reliability of our data reduction procedures and results, we have performed a data reduction pipeline based on the following steps: i) define a set of simulated HST-like images with synthetic globular cluster stellar distributions, which provide the ``true'' data for comparison; ii) convolve these images with appropriate assumptions of PSF and noise in order to construct simulated `` observed '' ... It contains 470 stars. b) ...

... A one line summary for each source detected by the EPIC detection tasks is created. The summary information is a subset of the information given in the emldetect source list table. ... M2_BOX_ID_SRC columns). emldetect source lists from different detection runs can be merged into one summary source list. ... The cross-correlation radius can be specified by an input parameter. ... In the case of several source lists from one instrument, count rates are averaged and exposure map values are added. ...

This visualization follows the original detection to Hubble observations of the July 9, 2005, burst. ... The group led by Derek Fox of Penn State then imaged the burst's X-ray afterglow with Chandra, shown as a square. ... Astrophysicists at the University of Copenhagen using the Danish 1.5-meter telescope at La Silla Observatory in Chile identified the optical afterglow.) ... NASA / University of Copenhagen; Visualization: Mike McClare / NASA GSFC ...

... About half an hour after the BAT trigger, the first images were obtained with the SAO RAS Zeiss-1000 telescope in four BVRI filters (see Fig.1). ... The spectrum of the optical transient was obtained with the SAO RAS 6-m BTA telescope 1.54 hours after the burst, using the SCORPIO instrument in the spectroscopic mode (Fig.2). ... The spectrum of the optical transient GRB090726 with identified lines, obtained with the BTA 1.54 hours after the burst. ...

... CELLMAP -- prepares x-ray qp file for DETECT. ... Running Snrmap .. ... Input xray Qpoe : xdata $rp110590.qp Output xray image : rp110590_cmp ROSAT PSPC Cellsize in arcsecs - 30 [h/b]| 45 [s]| 60 [s/h/b]| 120 [s/h/b]: 30 Energy Band (soft|hard|broad) (broad): hard xdata $rp110590.qp[bl=20,pi=52:201][128:639,128:639] - rp110590_cmp.imh add rp110590_cmp.imh,cellsize = 30 rp110590_cmp.imh updated xdata $rp110590.qp[pi=52:201] de snrmap Input xray image : rp110590_cmp Output snrmap ...

Next: Imaging Polarimetry with NICMOS Up: NICMOS Data Calibration and Previous: The Photometric Performance of . ... NICMOSlook and Calnic C . ... Extracting spectra from a large number of NICMOS grism images requires a convenient interactive tool which allows a user to manipulate direct/grism image pairs. ... NICMOSlook and Calnic-C are two programs that were designed to take advantage of the fact that the NICMOS grism mode typically consists of taking both a direct and a grism image. ...

OPTICAL IDENTIFICATIONS OF INTEGRAL / RXTE SOURCES WITH 1.5-METER OPTICAL TELESCOPE RTT150 I.Bikmaev (1,2), M.Revnivtsev (3,4) , R.Burenin (3) R.Sunyaev (3,4) , N.Sakhibullin (1,2) (1) Kazan State University, Kremlevskaya Str., ... 1, D-85741, Garching bei MЭnchen , Germany (3 (4) ABSTRACT We present the first results of our project on optical identifications of INTEGRAL / RXTE hard X-ray sources by using scientific instrumentations of the 1.5meter joint Russian-Turkish optical telescope RTT150. ...

DIS-III Spectra Other information . ... LOW Blue . ... MED Blue . ... HIGH Blue . ... Lines / mm . ... 5.03е /pix . 2.43е /pix . 2.26е /pix . 1.23е /pix . 0.84е /pix . 0.62е /pix . ... 7.0 е /pix . 3.05е /pix . 3.15е /pix . ... 1.17е /pix . ... Spacial scale for Blue gratings are: 0.42 arc-sec/pixel . ... 300 lines/mm . Low Blue . ... Med Blue . ... 0.9 " slit . ... unidentified . ... Offset Directions for DIS Using Various Interfaces as viewed by the Slit Camera . ...

... For massive binaries,   we assumed an initial mass ratio exponent , and obtained the total amount of both types of binary PSR with BH per Galaxy of 2 , which is in agreement with independent estimates of Narayan et al. ... The above estimate of number of bright BH+II binaries (similar to Cyg X-1), about 10 per Galaxy, yields a lower limit for the expected N(PSR+BH) 0.3 per 700 single pulsars (Figure 34 ). ... These estimates mean that PSR+BH systems may be discovered in the near future. ...

Hubble Finds Oxygen Atmosphere On Jupiter's Moon Europa . Astronomers using NASA's Hubble Space Telescope (HST) have identified the presence of an extremely tenuous atmosphere of molecular oxygen around Jupiter's second moon, Europa . ... Europa's oxygen atmosphere is so tenuous that its surface pressure is barely one hundred billionth that of the Earth," said Principal Investigator Doyle Hall, of Johns Hopkins. ... The oxygen gas slowly leaks into space and must be replenished continuously. ...

... The function is accessible, if the file with the image is open, and Ю identification of a star field is made. ... a) Load a first image by the command " Open ", and others by the command " Open +". b) Make an identification of the field. c) Open the menu " File ", select " Next " or press . ... It is necessary tree or more images. a) Load the first image by the command " Open" , and others by the command " Open + ". b) Open the menu " Marking ", select "Detect moving objects" or press - . ...

To appear in "Fourth Workshop on Robotic Autonomous Observatories (2015)"RevMexAA(SC) MASSIVE PHOTOMETRY OF LOW-ALTITUDE ARTIFICIAL SATELLITES ON MINI-MEGATORTORA S. Karpov, 1, 3 E. Katkova,2 G. Beskin, 1, 3 A. Biryukov3,4 S. Bondar,2 E. Davydov5 E. Ivanov,2 A. Perkov,2 V. Sasyuk3 RESUMEN Favor de prop orcionar un resumen en espanol. ... The nine-channel Mini-MegaTORTORA (MMT-9) optical widefield monitoring system with high temporal resolution system is in operation since June 2014. ...