- ID:
- ivo://nasa.heasarc/skyview/goodsnvla
- Title:
- GOODS North Observations with the VLA
- Short Name:
- GOODSNVLA
- Date:
- 07 Mar 2025
- Publisher:
- NASA/GSFC HEASARC
- Description:
- A combination of VLA measurements in all four configurations combined to generate a very deep image of the GOODS North region. A total of about 150 hours of VLA time was used. Data are sensitive to about 5 microJanskies in the central region. A total of 1230 discrete sources where found in the 40'x40' region. Provenance: VLA Observations taken by Morrison et al. as provided through their <a href="https://www.ifa.hawaii.edu/~morrison/GOODSN/">website</a>.. This is a service of NASA HEASARC.
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- ID:
- ivo://nasa.heasarc/skyview/granat
- Title:
- GRANAT/SIGMA Significance
- Short Name:
- GRANAT
- Date:
- 07 Mar 2025
- Publisher:
- NASA/GSFC HEASARC
- Description:
- The Soviet orbital observatory GRANAT was launched in December 1989 and was operational till November 1998. One of the main instruments of the observatory was the French-Soviet hard X-ray coded mask telescope SIGMA (Paul et al.1 1991, Adv.Space Res., 11, 279). It was the first space telescope that used coded aperture technique for reconstruction of sky images in hard X-rays (35-1300 keV). The angular resolution of the telescope was approximately 12' and the accuracy of a source localization is approximately 2-3'.<p> SIGMA discovered numerous interesting hard X-ray sources including GRS 1758-258, which is located only 40' from bright soft X-ray source GX 5-1. It detected hard X-ray flux from X-ray burster A1742-294, which is very near to bright black hole binary 1E1740.7-2942. SIGMA set an upper limit on the hard X-ray flux of from the central supermassive black hole in our Galaxy.<p> During the period 1990-1998 SIGMA observed more that one quarter of the sky with sensitivity better than 100 mCrab. The Galactic Center region had the deepest exposure ( approximately 9 million sec), with the sensitivity to a source discovery (S/N > ~ 5) or approximately 10 mCrab.<p> A list of all detected sources with references to publications on them is presented in the paper of Revnivtsev et al. 2004, Astr. Lett. v.6. In these survey images (40-100 keV) all performed observations are averaged together. Transient sources that were discovered by SIGMA may not visible in the averaged image. <p> This survey has some features that users should keep in mind. The SIGMA telescope is a complicated instrument and is strongly dominated by the accuracy of the background subtraction. The presence of a very bright source in the field of view of the telescope sometimes cannot be fully accounted for and as a result of it some 'ghost' sources can appear. Such features can be seen in the regions near very bright sources like Crab Nebula, Cyg X-1, Nova Per 1992, Nova Mus 1991, Nova Oph 1993, and in the Galactic Center region. In addition to its nominal field of view (~17x17 deg) located around the optical axis of the telescope, SIGMA had another window of relatively high transparency of its shield, approximately 20-30&#176;; apart from the optical axis. Becuase of this a very bright sources like Cyg X-1 can cause non zero illumination of the SIGMA detector if they are located approximately 20-30&#176;; from the optical axis. The ring-like features caused by this effect, can be seen around Cyg X-1, and Nova Per 1992. <p> The count rate of detected sources (or upper limits) can be roughly translated into mCrab using the fact that that Crab nebula gives the count rate approximately 2.8e<sup>-3</sup> cnts/s in the units, provided in 'flux' maps Provenance: High Energy Astrophysics Department, Space Research Institute, Moscow, Russia; CEA, Centre d'Etudes de Saclay Orme des Merisiers, France; Centre d'Etude Spatiale des Rayonnements, Toulouse, France; F&eacute;d&eacute;ration de Recherche Astroparticule et Cosmologie Universit&eacute; de Paris, France. This is a service of NASA HEASARC.
- ID:
- ivo://nasa.heasarc/skyview/gtee
- Title:
- GTEE 0035 MHz Radio survey
- Short Name:
- GTEE
- Date:
- 07 Mar 2025
- Publisher:
- NASA/GSFC HEASARC
- Description:
- This survey is a mosaic of data taken at the low frequency T-array near Gauribidanur, India. The data was distributed in the NRAO Images from the Radio Sky CD ROM. <p> The original 287x101 tiles had only 1 pixel overlap. To allow higher order resampling, the data were retiled into two hemisphere files of 1726x600 pixels with an overlap of 10 pixels. <p> The southernmost tiles were only 287x100 pixels. We assumed that bottom row of these tiles (as compared with the others) was truncated. Provenance: . This is a service of NASA HEASARC.
- ID:
- ivo://nasa.heasarc/skyview/halpha
- Title:
- H-alpha Full Sky Map
- Short Name:
- HAlpha
- Date:
- 07 Mar 2025
- Publisher:
- NASA/GSFC HEASARC
- Description:
- The full-sky H-alpha map (6' FWHM resolution) is a composite of the Virginia Tech Spectral line Survey (VTSS) in the north and the Southern H-Alpha Sky Survey Atlas (SHASSA) in the south. Stellar artifacts and bleed trails have been carefully removed from these maps. The Wisconsin H-Alpha Mapper (WHAM) survey provides a stable zero-point over 3/4 of the sky on a one degree scale. This composite map can be used to provide limits on thermal bremsstrahlung (free-free emission) from ionized gas known to contaminate microwave-background data. The map (in Rayleighs; 1R=10<sup>6</sup>/4pi photons/cm<sup>2</sup>/s/sr), an error map, and a bitmask are provided in 8640x4320 Cartesian projections as well as HEALPIX (Nside 256, 512, and 1024) projections on the <a href="https://faun.rc.fas.harvard.edu/dfink/skymaps/halpha/"> H-Alpha Full-Sky Map website</a>. Provenance: . This is a service of NASA HEASARC.
35. HEAO 1A
- ID:
- ivo://nasa.heasarc/skyview/heao1a
- Title:
- HEAO 1A
- Short Name:
- HEAO1A
- Date:
- 07 Mar 2025
- Publisher:
- NASA/GSFC HEASARC
- Description:
- These data were generated at the HEASARC in 1994. Certain gaps and streaks in the image have been fixed by interpolating over the the gap. Typically these gaps are no more than a pixel or two wide. A brief description of the satellite and the data analysis follows. The map used in <i> SkyView </i> is the map designated <tt> 322_15_tot_ecl_samp.img</tt> in the <a href=ftp://legacy.gsfc.nasa.gov/heao1/data/a2/maps/heasarc_med_hed> HEASARC FTP area</a>. Many other maps are available. These differ in epoch, resolution, energy band, coordinate system and projection, and sampling methods. Details are given in the README file in the archive. <p> See Allen, Jahoda, and Whitlock (1994) for full details about the available maps, their processing, and methods for converting the map intensities into familiar physical units. Provenance: NASA, HEASARC. This is a service of NASA HEASARC.
- ID:
- ivo://nasa.heasarc/skyview/herschel-spire
- Title:
- Herschel Space Observatory - SPIRE
- Short Name:
- HERSCHEL SPIRE
- Date:
- 07 Mar 2025
- Publisher:
- NASA/GSFC HEASARC
- Description:
- The Herschel SPIRE survey is Provenance: HERSCHEL Project. This is a service of NASA HEASARC.
- ID:
- ivo://nasa.heasarc/skyview/408mhz
- Title:
- HI All-Sky Continuum Survey
- Short Name:
- 408MHz
- Date:
- 07 Mar 2025
- Publisher:
- NASA/GSFC HEASARC
- Description:
- This survey is a mosaic of data taken at Jodrell Bank, Effelsberg and Parkes telescopes. The data was distributed in the NRAO <i>Images from the Radio Sky</i> CD ROM. Provenance: Max Planck Institute for Radio Astronomy, generated by Glyn Haslam. This is a service of NASA HEASARC.
- ID:
- ivo://nasa.heasarc/skyview/cfhtls-d-u
- Title:
- HIPS Survey:CFHTLS D u
- Short Name:
- CFHTLS-D-u
- Date:
- 07 Mar 2025
- Publisher:
- NASA/GSFC HEASARC
- Description:
- The Canada-France-Hawaii Telescope Legacy Survey is a 5-year program carried out jointly by the Canadian and French agencies. It will use the Megaprime/Megacam instrument mounted at prime focus of the 3.6m CFH telescope during the period 2003-2008. The Deep survey concerns 4 patchsof 1 square-degree. All will be observed in u,g,r,i and z, with very lon gexposure time<p> This survey description was generated automatically from the <a href='https://alasky.u-strasbg.fr/CFHTLS-T0007b/Deep/UALLSKY/properties'>HiPS property file</a> Provenance: CFHT<br> HiPS generated by CDS. This is a service of NASA HEASARC.
- ID:
- ivo://nasa.heasarc/skyview/cfhtls-w-u
- Title:
- HIPS Survey:CFHTLS W u
- Short Name:
- CFHTLS-W-u
- Date:
- 07 Mar 2025
- Publisher:
- NASA/GSFC HEASARC
- Description:
- The Canada-France-Hawaii Telescope Legacy Survey is a 5-year program carried out jointly by the Canadian and French agencies. It will use the Megaprime/Megacam instrument mounted at prime focus of the 3.6m CFH telescope during the period 2003-2008. The WIDE survey concerns 4 patchs, 3 of about 7x7 square-degrees each and 1 of about 4x4 square-degrees. All will be observed in u,g,r,i and z, with about 1 hr exposure time per filter<p> This survey description was generated automatically from the <a href='https://alasky.u-strasbg.fr/CFHTLS-T0007b/Wide/UALLSKY/properties'>HiPS property file</a> Provenance: CFHT<br> HiPS generated by CDS. This is a service of NASA HEASARC.
- ID:
- ivo://nasa.heasarc/skyview/tess
- Title:
- HIPS Survey:Transiting Exoplanet Survey Satellite
- Short Name:
- TESS
- Date:
- 07 Mar 2025
- Publisher:
- NASA/GSFC HEASARC
- Description:
- This is the TESS 2yr sky map. The Transiting Exoplanet Survey Satellite (TESS) is the next step in the search for planets outside of our solar system, including those that could support life. The mission will find exoplanets that periodically block part of the light from their host stars, events called transits. TESS will survey 200,000 of the brightest stars near the sun to search for transiting exoplanets. TESS aims for 50 ppm photometric precision on stars with TESS magnitude 9-15. TESS launched on April 18, 2018, aboard a SpaceX Falcon 9 rocket. This dataset is made of observations made during the first 2 years of the mission. See <a href="https://ui.adsabs.harvard.edu/abs/2015JATIS...1a4003R/abstract"> https://ui.adsabs.harvard.edu/abs/2015JATIS...1a4003R/abstract</a> for more information on the mission. Funding for the TESS mission is provided by NASA's Science Mission directorate. Provenance: TESS Data were obtained by using the code provided by Ethan Kruse at https://github.com/ethankruse/tess_fullsky. HiPS generated by CDS. This is a service of NASA HEASARC.
