- ID:
- ivo://astron.nl/hetdex/lotss-dr1/cone
- Title:
- LoTSS-DR1 Cross-Matched Source Catalogue
- Short Name:
- LoTSS-DR1 Cone Search
- Date:
- 04 Feb 2022 17:05:54
- Publisher:
- ASTRON
- Description:
- This service queries the catalog of radio sources from the LOFAR Two-metre Sky Survey First Data Release (LoTSS-DR1) that have been cross-matched with an optical or infrared counterpart. This data release contains images and catalogs that characterise the low-frequency radio emission in the region of the HETDEX Spring Field (right ascension 10h45m00s to15h30m00s and declination 45◦00′00′′ to 57◦00′00′′). A total of 325,694 radio sources are detected in a region covering 424 square degrees. The maps have a median sensitivity of 71 uJy/beam and a resolution of 6 arcsec. Optical counterparts for 71% of the radio sources have been identified and where possible photometric redshifts for these sources have been derived.
Number of results to display per page
Search Results
- ID:
- ivo://astron.nl/lotss_dr2/q/gaus_cone
- Title:
- LoTSS-DR2 Gaussian catalog cone search
- Short Name:
- LoTSS-DR2 Gaus
- Date:
- 28 Sep 2023 14:12:45
- Publisher:
- ASTRON
- Description:
- In this data release from the ongoing LOw-Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) we present 120-168 MHz images covering 27% of the northern sky. Our coverage is split into two regions centred at approximately 12h45m +44°30′ and 1h00m +28°00′ and spanning 4178 and 1457 square degrees respectively. The images were derived from 3,451 hrs (7.6 PB) of LOFAR High Band Antenna data which were corrected for the direction-independent instrumental properties as well as direction-dependent ionospheric distortions during extensive, but fully automated, data processing. A catalogue of 4,395,448 radio sources is derived from our total intensity (Stokes I) maps, where the majority of these have never been detected at radio wavelengths before. At 6′′ resolution, our full bandwidth Stokes I continuum maps with a central frequency of 144 MHz have: a median rms sensitivity of 83 μ Jy/beam; a flux density scale accuracy of approximately 10%; an astrometric accuracy of 0.2′′; and we estimate the point-source completeness to be 90% at a peak brightness of 0.8 mJy/beam. By creating three 16 MHz bandwidth images across the band we are able to measure the in-band spectral index of many sources, albeit the error on the derived spectral index is > ±0.2 which is a consequence of our flux-density scale accuracy and small fractional bandwidth. Our circular polarisation (Stokes V) 20′′ resolution 120-168 MHz continuum images have a median rms sensitivity of 95 μ Jy/beam, and we estimate a Stokes I to Stokes V leakage of 0.056%. Our linear polarisation (Stokes Q and Stokes U) image cubes consist of 480 97.6 kHz wide planes and have a median rms sensitivity per plane of 10.8mJy/beam at 4′ and 2.2mJy/beam at 20′′; we estimate the Stokes I to Stokes Q/U leakage to be approximately 0.2%. Here we characterise and publicly release our Stokes I, Q, U and V images in addition to the calibrated uv-data to facilitate the thorough scientific exploitation of this unique dataset. This service queries the Stokes I continuum mosaic gaussian component catalogue.
- ID:
- ivo://astron.nl/hetdex/lotss-dr1-raw/cone
- Title:
- LoTSS-DR1 Raw Radio Catalogue Cone Search
- Short Name:
- LoTSS-DR1 Raw
- Date:
- 12 Nov 2021 17:52:40
- Publisher:
- ASTRON
- Description:
- This service queries the catalog of radio sources from the LOFAR Two-metre Sky Survey First Data Release (LoTSS-DR1). This data release contains images and catalogs that characterise the low-frequency radio emission in the region of the HETDEX Spring Field (right ascension 10h45m00s to15h30m00s and declination 45◦00′00′′ to 57◦00′00′′). A total of 325,694 radio sources are detected in a region covering 424 square degrees. The maps have a median sensitivity of 71 uJy/beam and a resolution of 6 arcsec. Optical counterparts for 71% of the radio sources have been identified and where possible photometric redshifts for these sources have been derived.
- ID:
- ivo://org.gavo.dc/lotsspol/q/cone
- Title:
- LoTSS DR2 Rotation Measures
- Short Name:
- lotsspol SCS
- Date:
- 20 Jan 2023 07:33:07
- Publisher:
- The GAVO DC team
- Description:
- The LOFAR Two Meter Sky Survey LoTSS DR2 (:bibcode:`2022A&A...659A...1S`) obtained radio data from 27% of the northern sky between 120 and 168 MHz in the year 2014 through 2020. This service publishes polarization spectra of extragalactic radio sources (radio galaxies and blazars) and the rotation measures derived from them. We also give redshifts for all sources. The data has a spatial resolution of 20 arcsec.
- ID:
- ivo://astron.nl/lotss_dr2/q/src_cone
- Title:
- LoTSS-DR2 Source catalog cone search
- Short Name:
- LoTSS-DR2 Source
- Date:
- 28 Sep 2023 14:12:45
- Publisher:
- ASTRON
- Description:
- In this data release from the ongoing LOw-Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) we present 120-168 MHz images covering 27% of the northern sky. Our coverage is split into two regions centred at approximately 12h45m +44°30′ and 1h00m +28°00′ and spanning 4178 and 1457 square degrees respectively. The images were derived from 3,451 hrs (7.6 PB) of LOFAR High Band Antenna data which were corrected for the direction-independent instrumental properties as well as direction-dependent ionospheric distortions during extensive, but fully automated, data processing. A catalogue of 4,395,448 radio sources is derived from our total intensity (Stokes I) maps, where the majority of these have never been detected at radio wavelengths before. At 6′′ resolution, our full bandwidth Stokes I continuum maps with a central frequency of 144 MHz have: a median rms sensitivity of 83 μ Jy/beam; a flux density scale accuracy of approximately 10%; an astrometric accuracy of 0.2′′; and we estimate the point-source completeness to be 90% at a peak brightness of 0.8 mJy/beam. By creating three 16 MHz bandwidth images across the band we are able to measure the in-band spectral index of many sources, albeit the error on the derived spectral index is > ±0.2 which is a consequence of our flux-density scale accuracy and small fractional bandwidth. Our circular polarisation (Stokes V) 20′′ resolution 120-168 MHz continuum images have a median rms sensitivity of 95 μ Jy/beam, and we estimate a Stokes I to Stokes V leakage of 0.056%. Our linear polarisation (Stokes Q and Stokes U) image cubes consist of 480 97.6 kHz wide planes and have a median rms sensitivity per plane of 10.8mJy/beam at 4′ and 2.2mJy/beam at 20′′; we estimate the Stokes I to Stokes Q/U leakage to be approximately 0.2%. Here we characterise and publicly release our Stokes I, Q, U and V images in addition to the calibrated uv-data to facilitate the thorough scientific exploitation of this unique dataset. This service queries the Stokes I continuum mosaic source catalogue.
- ID:
- ivo://org.gavo.dc/mcextinct/q/cone
- Title:
- Magellanic Clouds Extinction Values
- Short Name:
- MC extinctions
- Date:
- 23 Mar 2022 13:13:07
- Publisher:
- The GAVO DC team
- Description:
- A catalogue of E(V-I) extinction values is presented for 3174 (LMC) and 693 (SMC) fields within the Magellanic Clouds. The extinction values were computed by determining the (V-I) colour difference of the red clump from Optical Gravitational Microlensing Experiment (OGLE III) observations in the V and I bands and theoretical values for unreddend red clump colours.
67. 2Mass Query
- ID:
- ivo://org.gavo.dc/2mass/res/2mass/q
- Title:
- 2Mass Query
- Short Name:
- twomass_q
- Date:
- 23 Mar 2022 13:13:10
- Publisher:
- The GAVO DC team
- Description:
- The 2MASS Point Source Catalogue, short a couple of exotic fields. We provide this data mainly for matching with other catalogs within our TAP service.
- ID:
- ivo://astron.nl/mvf/q/cone
- Title:
- MSSS Verification Field Sources
- Short Name:
- MSSS Cone Search
- Date:
- 08 Jun 2020 20:34:26
- Publisher:
- ASTRON
- Description:
- This service queries the unified source catalogue of radio sources from the Multifrequency Snapshot Sky Survey (MSSS) Verification Field. This survey is the first major observing program to be carried out with LOFAR during its ongoing commissioning phase. This service queries the unified source catalogue database for the MSSS survey. The Verification Field is a region of 100 square degrees centered at (15h,69◦).
- ID:
- ivo://musewide.aip.de/conesearch
- Title:
- MUSE-Wide survey Cone Search Service
- Date:
- 19 Apr 2020
- Publisher:
- Leibniz Institute for Astrophysics Potsdam (AIP)
- Description:
- The Cone Search Service for musewide.aip.de.
- ID:
- ivo://xaovo/nsone/q/web
- Title:
- 1M-WideField Images Web
- Short Name:
- NOWT_web
- Date:
- 25 Mar 2024 03:33:36
- Publisher:
- Xinjiang Astronomical Observatory,CAS
- Description:
- Images created by 1M-WideField