- ID:
- ivo://CDS.VizieR/IX/43
- Title:
- 1SXPS Swift X-ray telescope point source catalogue
- Short Name:
- IX/43
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the 1SXPS (Swift-XRT Point Source) catalogue of 151,524 X-ray point-sources detected by the Swift-XRT in 8 years of operation. The catalogue covers 1905 square degrees distributed approximately uniformly on the sky. We analyze the data in two ways. First we consider all observations individually, for which we have a typical sensitivity of ~3e-13 erg.cm^-2^s^-1` (0.3-10 keV). Then we co-add all data covering the same location on the sky: these images have a typical sensitivity of ~9e-14 erg cm^-2^s^-1^ (0.3-10 keV). Our sky coverage is nearly 2.5 times that of 3XMM-DR4, although the catalog is a factor of ~1.5 less sensitive. The median position error is 5.5" (90% confidence), including systematics. Our source detection method improves on that used in previous XRT catalogues and we report >68,000 new X-ray sources. The goals and observing strategy of the Swift satellite allow us to probe source variability on multiple timescales, and we find ~30,000 variable objects in our catalog. For every source we give positions, fluxes, time series (in four energy bands and two hardness ratios), estimates of the spectral properties, spectra and spectral fits for the brightest sources, and variability probabilities in multiple energy bands and timescales.
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- ID:
- ivo://CDS.VizieR/J/A+A/469/1221
- Title:
- Sydney observatory Galactic survey (SOGS)
- Short Name:
- J/A+A/469/1221
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- First Epoch astrometric and radiometric information of a survey in the optical along the Galactic fourth quadrant is archived for further analysis in the time-domain. A photographic survey of 1.9x10^6^ stars down to B-magnitude 14.5+/-0.5 along the galactic meridian l=(330+/-5){deg},-64{deg}<b<-7{deg} and along the galactic equator 272{deg}<l<341{deg},-7{deg}<b<7{deg}, is provided from century old astrographic plates of Sydney Observatory. Stellar candidates to investigate the Galaxy disk kinematics up to a distance of 1kpc from the Sun are tentatively selected. A catalogue of 4.8x10^5^ stars is provided for further investigation of the galactic disk heating by transient spiral wave or by GMC encounter.
- ID:
- ivo://CDS.VizieR/I/86A
- Title:
- Sydney Southern Star Catalogue
- Short Name:
- I/86A
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This catalogue principally covers the range between -51deg. and -63.5 deg and contains positions and proper motions for 29,926 stars. 3244 faint Astrographic stars were added to supplement the stars at fainter magnitudes. Positions in standard form (hours, minutes, and seconds of time for the right ascensions and degrees, minutes, and seconds of arc for the declinations) have been added to the machine readable version of this catalogue.
- ID:
- ivo://nasa.heasarc/skyview/sumss
- Title:
- Sydney University Molonglo Sky Survey
- Short Name:
- SUMSS
- Date:
- 09 May 2025
- Publisher:
- NASA/GSFC HEASARC
- Description:
- The Sydney University Molonglo Sky Survey (SUMSS) is a deep radio survey at 843 MHz of the entire sky south of declination -30&#176;;, made using the Molonglo Observatory Synthesis Telescope (<a href="https://www.physics.usyd.edu.au/astrop/most/"> MOST </a>), located near Canberra, Australia. The images from the SUMSS are produced as 4 x 4 degree mosaics of up to seventeen individual observations, to ensure even sensitivity across the sky. The mosaics slightly overlap each other. Data were last updated on January 28, 2015. <p> Images can also be obtained from the <a href="https://www.astrop.physics.usyd.edu.au/cgi-bin/postage.pl">SUMSS Postage Stamp Server</a>. <p> The SUMSS is intended to complement the NRAO-VLA Sky Survey (NVSS) which covered the sky between +90 and -40 deg declination, at a frequency of 1400MHz. <p> Provenance: The SUMSS project team, University of Sydney. This is a service of NASA HEASARC.
- ID:
- ivo://CDS.VizieR/VIII/78
- Title:
- Sydney University Molonglo Sky Survey (SUMSS)
- Short Name:
- VIII/78
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The Sydney University Molonglo Sky Survey (SUMSS) is being carried out at 843MHz with the Molonglo Observatory Synthesis Telescope (MOST) in its upgraded wide-field capability. The survey consists of 4.3x4.3{deg} mosaic images with 45x45''cosec{delta} resolution, covering 8000 square degrees from -30 degrees declination southwards. The survey resolution and sensitivity (1-sigma noise limit 1mJy) are well-matched to the NRAO VLA Sky Survey (NVSS) so that together NVSS and SUMSS will provide a complete survey of the radio sky. The version 1.7 (01-Jun-2006) of the catalogue consists of 205676 radio sources made by fitting elliptical gaussians in 671 SUMSS mosaics to a limiting peak brightness of 6mJy/beam at declination <-50{deg}, and 10mJy/beam at declination >-50{deg}. Positional accuracies are 1-2'' for sources with S_p_>=20mJy/beam, and are always better than 10''. The internal flux density scale is accurate to 3%. Image artefacts have been classified using a decision tree, which correctly identifies and rejects spurious sources in over 96% of cases. See the SUMSS site at http://www.astrop.physics.usyd.edu.au/sumsscat/ for details about all versions of the SUMSS, and an access to the mosaic images.
- ID:
- ivo://nasa.heasarc/sumss
- Title:
- Sydney University Molonglo Sky Survey (SUMSS) Source Catalog
- Short Name:
- SUMSS
- Date:
- 09 May 2025
- Publisher:
- NASA/GSFC HEASARC
- Description:
- The Sydney University Molonglo Sky Survey (SUMSS) is a radio imaging survey of the sky south of declination, delta = -30 degrees (a total area of 8100 square degrees) carried out with the Molonglo Observatory Synthesis Telescope (MOST) operating at 843 MHz. The survey consists of 629 4.3 degrees by 4.3 degrees mosaic images with a resolution of 45" by 45" x cosec delta, and a limiting peak brightness of 6 mJy/beam at declinations delta <= 50 degrees, and 10 mJy/beam at delta > 50 degrees. The SUMSS is therefore similar in sensitivity and resolution to the northern NRAO VLA Sky Survey (NVSS). This table based on the latest version of the SUMSS Source Catalog of radio sources (which uses all of the released mosaics). Sources were found by fitting two-dimensional Gaussians to SUMSS mosaics. Positions in the catalog are accurate to within 1-2" for sources with peak brightness >= 20 mJy/beam, and are always better than 10". The internal flux density scale is accurate to within 3%. Image artifacts were classified using a decision tree, which correctly identified and rejected spurious sources in over 96% of cases. Analysis of the catalog shows that it is highly uniform and is complete to 8 mJy at delta <= -50 degrees, and to 18 mJy at delta > -50 degrees. This HEASARC table was initially created in August 2005. It is updated automatically within a week of any detected change to the SUMSS Source Catalog as obtained from the SUMSS Website at the following URL: <pre> <a href="https://web.archive.org/web/20241228020055/">https://web.archive.org/web/20241228020055/</a><a href="http://www.astrop.physics.usyd.edu.au/sumsscat/update">http://www.astrop.physics.usyd.edu.au/sumsscat/update</a> </pre> This is a service provided by NASA HEASARC .
- ID:
- ivo://CDS.VizieR/VIII/81B
- Title:
- Sydney University Molonglo Sky Survey (SUMSS V2.1)
- Short Name:
- VIII/81B
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The Sydney University Molonglo Sky Survey (SUMSS) is carried out at 843MHz with the Molonglo Observatory Synthesis Telescope (MOST) in its upgraded wide-field capability. The survey consists of 4.3x4.3{deg} mosaic images with 45x45''cosec{delta} resolution, covering 8000 square degrees from -30 degrees declination southwards with |b|>10{deg}. The survey resolution and sensitivity (1-sigma noise limit 1mJy) are well-matched to the NRAO VLA Sky Survey (NVSS) so that together NVSS and SUMSS provide a complete survey of the radio sky. The version 2.0 (08-Aug-2007) of the catalogue consists of 210412 radio sources made by fitting elliptical gaussians in 633 SUMSS mosaics to a limiting peak brightness of 6mJy/beam at declination <-50{deg}, and 10mJy/beam at declination >-50{deg}. Positional accuracies are 1-2'' for sources with S_p_>=20mJy/beam, and are always better than 10''. The internal flux density scale is accurate to 3%. Image artefacts have been classified using a decision tree, which correctly identifies and rejects spurious sources in over 96% of cases. See the SUMSS site at http://www.astrop.physics.usyd.edu.au/sumsscat/ for details about all versions of the SUMSS, and an access to the mosaic images. The version 2.1 (from 2008-03-11) corrects a bug in 2.0 in which some bright (S>500 mJy) sources were missing from the catalogue.
- ID:
- ivo://CDS.VizieR/J/MNRAS/462/2695
- Title:
- Symbiotic recurrent nova T CrB spectroscopy
- Short Name:
- J/MNRAS/462/2695
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- T CrB is a symbiotic recurrent nova known to exhibit active phases, characterized by apparent increases in the hot component temperature and the appearance of flickering, i.e. changes in the observed flux on the time-scale of minutes. Historical UV observations have ruled out orbital variability as an explanation for flickering and instead suggest flickering is caused by variable mass transfer. We have analysed optical and X-ray observations to investigate the nature of the flickering as well as the active phases in T CrB. The spectroscopic and photometric observations confirm that the active phases follow two periods of ~1000d and ~5000d. Flickering in the X-rays is detected and follows an amplitude-flux relationship similar to that observed in the optical. The flickering is most prominent at harder X-ray energies, suggesting that it originates in the boundary layer between the accretion disc and the white dwarf. The X-ray radiation from the boundary layer is then reprocessed by a thick accretion disc or a nebula into UV radiation. A more detailed understanding of flickering would benefit from long-term simultaneous X-ray and optical monitoring of the phenomena in symbiotic recurrent novae and related systems such as Z And type symbiotic stars.
21319. Symbiotic Stars Catalog
- ID:
- ivo://nasa.heasarc/symbiotics
- Title:
- Symbiotic Stars Catalog
- Short Name:
- Symbiotics
- Date:
- 09 May 2025
- Publisher:
- NASA/GSFC HEASARC
- Description:
- This database table contains a catalog of confirmed and suspected symbiotic stars. The list includes 188 symbiotic stars as well as 30 objects suspected of being symbiotic. For each star, basic observational material is presented: coordinates, V and K magnitudes, ultraviolet (UV), infrared (IR), X-ray and radio observations. Also listed are the spectral type of the cool component, the maximum ionization potential observed, references to finding charts, spectra, classifications and recent (as of 2000) papers discussing the physical parameters and nature of each object. This table does NOT contain the information on orbital photometric ephemerides and orbital elements of known symbiotic binaries, pulsational periods for symbiotic Miras, Hipparcos parallaxes and information about outbursts and flickering that is contained in the printed version of the catalog (see Tables 3-7 in the paper for this material). This table was created by the HEASARC in November 2005 based on 4 CDS tables (table1.dat, table1b.dat, table2.dat, table2b.dat) from the directory J/A+AS/146/407/. This is a service provided by NASA HEASARC .
21320. Symbiotic stars catalogue
- ID:
- ivo://CDS.VizieR/J/A+AS/146/407
- Title:
- Symbiotic stars catalogue
- Short Name:
- J/A+AS/146/407
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a new catalogue of symbiotic stars. In our list we include 188 symbiotic stars as well as 30 objects suspected of being symbiotic. For each star, we present basic observational material: coordinates, V and K magnitudes, ultraviolet (UV), infrared (IR), X-ray and radio observations. We also list the spectral type of the cool component, the maximum ionization potential observed, references to finding charts, spectra, classifications and recent papers discussing the physical parameters and nature of each object. Moreover, we present the orbital photometric ephemerides and orbital elements of known symbiotic binaries, pulsational periods for symbiotic Miras, Hipparcos parallaxes and information about outbursts and flickering.
