... LABORATORY OF RADIO ASTRONOMICAL OBSERVATIONS . Radio sources identification is one of the most important tasks of the current radio astrophysics. ... Optical idetification. ... Optical identifications of subsample of steep spectra radio sources from RC catalog using 6m SAO telescope of SAO RAS: optical observations. ... Astronomy Reports. ... Identification of radio sources with data of various radio catalogs allows one to construct continual spectrum of the object and its radio structure. ...

... 88, Jan. 1983, p. 1-15. l. A survey of extragalactic radio sources made using driven declination scans is reported covering an area of about 0.07 sr to a limiting flux density of 35 mJy. The fast-scan survey was carried out at a galactic latitude greater than 17 deg with the NRAO 91-m telescope operating at 4.755 GHz, and the 480 sources detected were reobserved at 1.4 GHz with the National Astronomy and Ionosphere Center 305-m telescope at Arecibo. ...

We investigate the luminous X-ray sources in the Lockman Hole (LH) and the extended Groth strip (EGS) detected at 24 нјm using the Multiband Imaging Photometer (MIPS) and also with the Infrared Array Camera (IRAC) on board the Spitzer Space Telescope. We assemble optical/infrared spectral energy distributions (SEDs) for 45 X-ray/24 нјm sources in the EGS and LH. Only about one-quarter of the hard X-ray/24 нјm sources show pure type 1 active galactic nucleus (AGN) SEDs. ... ADS Citation Query . ...

... Flux density at 1 GHz (/Jy): 28 . ... Radio: Shell, brightest to the S. Optical: Filaments correspond well to the radio shell, brightest in SE. X-ray: Brightest to NW, with point source near centre. Point sources: Central, variable X-ray source, and nearby pulsar. ... Molonglo at 408 MHz (3') and Parkes 64-m at 5 GHz (4'). ADS . ... ASCA observations of compact X-ray source. ... X-ray variability of central source. ... ATCA at 1.4 GHz (50''), including H I absorption to central source. ...

... The stars examined here were primarily culled from two lists of X--ray sources in Orion. ... The second region is two degrees in extent east--west and ten degrees north--south with Orionis being near the northern edge. ... In the end, two main regions were chosen for monitoring: stars near Orionis and stars northwest of the belt of Orion. ... The PSPC identified 22 sources within 15 of Orionis in addition to the sources listed in Table 1 , giving a total of 85 X--ray sources in the Orionis region. ...

An investigation of the spectral energy distribution (SED) of the compact steep-spectrum (CSS) source and possible radio-loud narrow-line Seyfert 1 galaxy (NLS1), PKS 2004-447, is presented. ... Analysis of a non-contemporaneous, low-resolution optical spectrum suggests that the narrow-line region (NLR) is much more reddened than the X-ray emitting region suggesting that the gas-to-dust ratio in PKS 2004-447 may be very different than in our own Galaxy. ...

Next: The Model Up: No Title Previous: Radiopulsars as Sources of . In this section, we study the evolution of stellar populations on a time-scale of 10 Myr for a starburst љ occurring under conditions similar to those in the Galactic Center (see Lipunov et al. (1995d)[ 126 ]). We estimate the expected number of X-ray transient љ sources (NS + MS star), super accreting BH, and BH + supergiant binaries, all as functions of time elapsed after the burst. ...

... During the analysis of the surveys carried out on RATAN-600, it was found that almost one fifth of the detected sources shows significant radio flux variations. ... We used the data from "Cold" radio surveys carried out with RATAN-600 in 1980-1994 to search for radio sources with significant flux variability. ... On possibility of detection of variable sources using the data of Cold surveys carried out on RATAN-600. ... Detection of Variable Sources Using the Data of "Cold" Surveys. ...

... The ODFs are generated with scisim-2.1. 1.1 scisimsimple This test ODF contains one X-ray source (1 keV, broadened with a 20 eV Gaussian), and several optical sources. The ODF was generated using the default con guration modes for all of the XMM instruments as provided by SciSim. 1.2 scisimquad This test ODF is an observation of four point sources with an incident angle of 0.05 degrees and positioned in a square. ... All instruments are in the default con guration mode as provided by SciSim. ...

... The VSOP Survey Continuum Source List . The radio sample for the VSOP continuum survey was defined to include all extragalactic radio sources with: . a total flux density at 5 GHz, S>=1.0 Jy . ... The sample also included all sources in the sky with a 5 GHz flux density S>5 Jy, regardless of spectral index and galactic latitude. ... The source would then be included in the VSOP sample (three of the sources were found with a flux density above 1 Jy and added to the sample). ...

Next: Sample Properties Up: Sample Identification Previous: Comments on Individual Sources . Previously known serendipitous sources were selected by cross-correlating WGACAT with a variety of optical and radio catalogs, including the Ver?n-Cetty & Ver?n (1996) and Hewitt & Burbidge (1993) quasar catalogs, the 1 Jy (Stickel et al. 1994) and S4 (Stickel & K?hr 1994) radio catalogs, and the BL Lac catalog of Padovani & Giommi (1995b). ... Details of these 97 objects are given in Table 6. ...

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. ...

In calculating the NIFS sensitivity, we adopt a read noise of 5 e - , a dark current of 0.01 e - s -1 pix -1 , and a maximum exposure time of 3600 s. Grating . ... e/pix) . ... OH Cont. (e/pix) . ... NIFS should achieve signal-to-noise ratios of ~ 10 per spectral pixel in a 0.1" 0.1" aperture for single 1800 s exposures on uniform, extended, continuum sources with surface brightnesses of J = 15.4, J = 15.0, H = 14.8, and K = 13.5 mag arcsec -2 using the Z , J , H , and K gratings, respectively. ...

... Field of interest: data analysis and interpretation of X-ray observations of BHC and NS systems, astrophysics of compact objects and related phenomena: X-ray , optical and radio observations , shocks and stellar winds, emission mechanism, the spectral and timing analysis of the X-ray emission from microquasars ( signature of accreting BH), atoll- and Z-sources ( signature of accreting NS), modeling of INTEGRAL images % . ...

... Radio searches for pulsars associated with supernova remnants. ... The Bologna submillisecond pulsar survey. ... A search for pulsar wind nebulae using pulsar gating. ... Anomalous pulsars and other radio quiet neutron stars in supernova remnants. ... A 16 ms X-ray pulsar in the Crab-like SNR N157B: fast times at 30 Doradus. ... Radio-quiet X-ray pulsars in SNRs and the ``missing'' pulsar problem. ... Searching for X-ray pulsars associated to SNRs in public ROSAT observations. ...

Next: USING THE AO-CONTROL GUI FOR SPECTRAL LINE OBSERVATIONS Up: Spectral-Line Observing at AO Previous: STANDARDS OF REST & . This is the list of objects you wish to observe. Ideally, it should be named 'src.list' and should be placed in your project area on the data-taking computer. The format for your source list is: . name RhRmRs.s DdDmDs.s b/j velocity # Any comments you have . Name: Your object name, usually given as one word (no spaces). ... Good target . ... Lousy Target . ...

... The X-ray Sources of M31 . ... Credit: ROSAT , MPE , NASA Explanation: Just like our own Milky Way Galaxy , the nearest major galaxy M31 has many star systems spewing high energy radiation . ... Публикации с ключевыми словами: X-ray - рентгеновские источники - рентгеновские двойные - Рентгеновский телескоп - Андромеда . Публикации со словами: X-ray - рентгеновские источники - рентгеновские двойные - Рентгеновский телескоп - Андромеда . ... Рентгеновский телескоп Чандра . ...

... December 31, 1995 . The X-ray Sources of M31 . Credit: ROSAT , MPE , NASA . Explanation: Just like our own Milky Way Galaxy , the nearest major galaxy M31 has many star systems spewing high energy radiation . ... The X-ray sources in M31 occur in globular clusters , the spiral arms , and near the galaxy's center. ... M31 has more X-ray sources near its center than our Galaxy, and the reason for this is currently unknown. ... About APOD | ... NASA Technical Rep.: ...

... The ROSAT Results Archive (RRA) is a publicly accessible collection of source lists, images, spectra, lightcurves and counting rates derived from pointed-phase observations of the ROSAT X-ray satellite observatory. ... This paper discusses the methods and tools used to screen ROSAT source results, and discusses ways in which the data will eventually be made accessible to the general astronomical community. ... Each field and source gets assigned a set of quality flags by these scripts: . ...

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