... It may be desirable to apply (in addition to the source selection described above) some definite upper limit to the number of sources to be plotted - say, to plot only the first 50 brightest sources. Such a limit may be difficult or impossible to achieve by use of the expression parameter. ... The parameter ncutsortexpression has been provided to allow the sources to be sorted. ... slconv srclisttab=bert.ds:SRCLIST radiusexpression='RATE' withncut=yes ncutsortexpression='RATE' ncut=10 . ...

Next: Inspection of results Up: *fit* - Fit Data Previous: Verbose Mode . If the number of net counts for a source is less than it is impractical to fit the data in all 34 energy bits. However, if the flux is required, then a fit must be performed first. ... Fit will then calculate the normalization of the model and xflux can be used to determine the flux and luminosity of the source from the best fit model. xs> fit rebin=yes . ...

NStars 1: photometric surveyse --- | ... There are a number of 2MASS sources which have (faint) counterparts on POSS II F (R) or N (I), but don't have an entry in the GSC 2.2. ... It is possible that some images might have no GSC counterpart due to proper motion taking the source outside the 6 arcsecond search radius between the palte-taking and the 2MASS observation. ... Figure a1.1: The (F-J)/(J-K) two-colour diagram for faint sources with GSC2.2 counterparts. ... Intermediate sample . ...

Figure 1: The ux density distribution of confusing sources in the IDV sample for 1.4 GHz. ... N corresponds to the number of confusing sources detected in 101 images of the IDV sample target sources (no beam shape correction applied). 1 (a) 2.4 GHz (b) 4.8 GHz Figure 2: The number distribution of modulation indices,  of the total ux den- sity calculated over the duration of each observing run: May 1994 and August 1994. The distributions of  are shown for (a) 2.4 GHz and (b) 4.8 GHz. ...

... 389Voges+ IX/29 ROSAT All-Sky Survey Faint Source Catalog (Voges+ 2000) ============================================================================= ROSAT All-Sky Survey Faint source Catalogue (RASS-FSC) Voges W., Aschenbach B., Boller Th., ... The sources have a detection likelihood of at least 7 and contain at least 6 source photons. ... 0 Extraction radius 141-146 A6 --- PrioFlags [01] priority flags (8) 147 A1 --- PHA [ABCDb] PHA range of best detection (9) 149-152 F4.2 --- VigFactor ?= ...

... The numbers of three types of compact binaries containing accreting NSs and BHs, which are most interesting from the point of view of their observational appearances, have been calculated as a function of time: i) X-ray transient source containing a NS in an eccentric orbit around a main sequence Be-star (the observed prototype: A0535+26), ii) BH The evolution of the selected types of X-ray binaries during the first 10 million years after the starburst onset is presented in Fig. ...

... The actual cross-correlations were done as follows: north of WGACAT was correlated with the GB6 catalog with a correlation radius of one arc minute. ... We therefore cross-correlated WGACAT with the GB6 and PMN radio catalogs with a 1.5 arcmin radius. ... As a result of this experiment, we then added to the WGACAT/PMN candidate list the 29 unclassified sources obtained from the 1.5 arcmin correlation and having PSPC offsets arcmin, ratio between X-ray/radio offset and positional error , and . ...

Next: Program use Up: Description of program searchdup Previous: Description of program searchdup . Parameter input is done with a graphic user interface. ... Input file: Name of the input catalog file. It has to be formatted, one record per source/observation, according to the format used in the Arcetri observations and source archives. ... Minimum number of observations per source Source with less than this number of independent observations are not included in the output file . ...

CONTENTS Volume 25 Number 1 (January 1998) . ... A. A. Ubachukwu . SPECTRAL INDEX ASYMMETRIES IN POWERFUL RADIO SOURCES: COSMOLOGICAL EVOLUTION VERSUS LUMINOSITY SELECTION EFFECTS . ... A. G. Gunn . ... A MEDIEVAL IRISH TREATISE ON ASTRONOMY RECALLED, WITH A MEMOIR OF ITS TRANSLATOR AND EDITOR, MAURA POWER (1887-1916) . ... 1995-1999 Irish Astronomical Journal, Downshay, 12 Heather Lea Avenue, Dore, Sheffield S17 3DJ, S. Yorkshire, United Kingdom WWW Contact: Alastair G Gunn Back to IAJ Home Page ...

. Previous . Next . Returns the number of lexemes or word stems in a text search vector. length(tsv TSVECTOR) RETURNS INT4 SELECT line_number, ts_vec, length(ts_vec) FROM ts_readme ORDER BY line_number LIMIT 3; line_number | ts_vec | length -------------+---------------------------------------------------------------------+-------- 1 | 'full':2 'text':3 'extens':5 'search':4 'tsearch2':1 'postgresql':7 | 6 2 | | 0 3 | '10':1 'avail':8 'onlin':2 'version':3 'document':6 | 5 (3 rows)

FIFTEENTH CREW REQUIRED RESOURCES TWELFTH RUSSIAN VISITING CREW IMAGE . ... EXPEDITION FIFTEEN (ISS-15) . ... During ISS-15, it is planned to implement 272 sessions of 47 experiments. ... Breakdown of Experiments and Number of Sessions by Research Areas. Research Area . Experiment Name . Totally . ... Research of space rays . ... Ascent to ISS RS: by Soyuz TMA-10 . ... ISS-15 Crew Commander F. Urchikhin (Russia) . ... RECORDING AND TRANSFER OF SCIENTIFIC DATA TO PRINCIPAL INVESTIGATORS . ...

... Canadian Astronomy Data Center, DAO/NRC . SkyCat is a tool that combines image visualization with access to astronomical catalogs and data archives. SkyCat uses a standardized URL syntax to access a large number of data sources on the net. ... More information on SkyCat can be found at the SkyCat Web site. The ESO SkyCat Tool includes the following features: . ... PostScript color printing of the display (image + graphics), . ... overlay catalog sources on an image, . ...

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The NICFPS:Dither:Point Source Random script allows you to take a sequence of exposures in a square pattern plus a point in the middle. This pattern is typically used for point sources. ... Any dither point may be omitted by unchecking its checkbox before running the script. ... Dither pattern without randomization . ... Randomization 1. ... Dither pattern with randomization Thanks to Corey Wood for the first implementation of randomization and for the images used in the documentation. ...

Family ASTRO Event Leaders can follow the links below to find a number of resources and more background reading to help them with their Astronomy Events and expand their knowledge on the topics covered in our series of Leader Kits for educators. ... Print and Web Resources on the Night Sky . ... If you have questions about Family ASTRO, see our Frequently Asked Questions for Educators and Astronomers page , or our Frequently Asked Questions for Families and Friends page. ...

. AO Fax Numbers . Telephone Numbers . Arecibo Observatory . ( 787 ) 878-2612 . NAIC Ithaca . ( 607 ) 255-3735 . Fax Numbers . Arecibo Observatory ( Gen. ) . 787 - 878-1861 . Purchasing Dept. 787 - 880-0662 . Human Resources . 787 - 880-8025 . Facilities Dept. 787 - 880-8050 . Administration . 787 - 879-3007 . Electronics Dept. 787 - 817-2740 . Visitor Center . 787 - 817-6117 . Scientific Services . 787 - 879-4415 . Control Room . 787 - 817-6135 . Warehouse . 787 - 817-1345 . NAIC Ithaca . 607 - 255-8803 .

SIMPLE = T / file does conform to FITS standard BITPIX = 8 / number of bits per data pixel NAXIS = 0 / number of data axes EXTEND = T / FITS dataset may contain extensions COMMENT FITS (Flexible Image Transport System) format is defined in 'AstronomyCOMMENT and Astrophysics', volume 376, page 359; bibcode: 2001A .. ... IMAGEW = 4256 / image width IMAGEH = 2832 / image height ANRUN = T / Solve this field! ...

... Exposure Time Calculator (ETC) . ... ESO - Public Surveys . ... the recommended values to use for DIT, . ... Detector on-chip integration (DIT): seconds. to your chosen value - a separate page gives recommended values to use for DIT - for modes 1 and 2 below you may wish to start with the maximum recommended values as these will minimize the effect of read noise (a total object exposure of Y secs with DIT=X secs will produce Y/X lots of read noise) and give you a lower limit on the time needed. ...

USING THE CORRELATION BETWEEN ISGRI SURVEY RESULTS AND OTHER CATALOGUES TO AID SOURCE IDENTIFICATION John B. Stephen, A. Malizia and L. Bassani IASF-INAF, Via P. Gobetti 101, 40129 Bologna, ITALY, E-mail: stephen@iasfbo.inaf.it ABSTRACT In order to help in the identification of INTEGRAL/ISGRI sources, we have developed a software package which allows a rapid and detailed cross-correlation to be performed between various source catalogues. ... We show below some preliminary results from this analysis. ...

... Astrophysics Group . ... Variability studies . ... The variability of radio sources at 151 MHz has been studied in detail using the CLFST , as part of the 7C survey. ... The 7C survey of radio sources at 151 MHz ? ... McGilchrist & Riley 1990 MNRAS, 246, 123 ; . ... From Green & Riley (1995), the 51P and 52P source lists at 408 MHz, plus the 53P and 54P source lists at 1420 MHz. From Riley & Green (1998), the 67P and 68P source lists at 408 MHz, plus the 69P and 70P source lists at 1420 MHz. ...