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- ID:
- ivo://org.gavo.dc/apo/res/apo/frames
- Title:
- Apache Point observations of lensed quasars
- Short Name:
- apo.frames
- Date:
- 23 Mar 2022 13:13:04
- Publisher:
- The GAVO DC team
- Description:
- Observations of the lensed quasar Q2237+0305 performed between 1995 and 1998.
- ID:
- ivo://astron.nl/apertif_dr_bootes/q/cutout
- Title:
- Apertif DR Bootes - Mosaic
- Short Name:
- DR Bootes
- Date:
- 23 Jun 2023 13:45:11
- Publisher:
- ASTRON
- Description:
- This service provides mosaic from the images of the Apertif DR Bootes.
- ID:
- ivo://org.gavo.dc/bgds/q/sia
- Title:
- Bochum Galactic Disk Survey (BGDS) images
- Short Name:
- bgds sia
- Date:
- 09 Feb 2023 14:31:11
- Publisher:
- The GAVO DC team
- Description:
- The Bochum Galactic Disk Survey is an ongoing project to monitor the stellar content of the Galactic disk in a 6 degree wide stripe centered on the Galactic plane. The data has been recorded since mid-2010 in Sloan r and i simultaneously with the RoBoTT Telecsope at the Universitaetssternwarte Bochum near Cerro Armazones in the Chilean Atacama desert. It contains measurements of about 2x10^7 stars over more than seven years. Additionally, intermittent measurements in Johnson UVB and Sloan z have been recorded as well.
- ID:
- ivo://org.gavo.dc/boydende/q/data
- Title:
- Boyden Station ADH Plates in Germany
- Short Name:
- boydende.data
- Date:
- 21 Mar 2023 00:03:28
- Publisher:
- The GAVO DC team
- Description:
- The Armagh-Dunsink-Harvard Becker-Schmidt Telescope was deployed at Boyden Station, Maselspoort South Africa between 1965 and 1970. During that time, astronomers from Bamberg, Heidelberg, Hamburg and Münster took astronomical images there, with a focus on old star clusters, the Magellanic clouds, and the southern milky way. This service provides scans of the plates obtained.
- ID:
- ivo://org.gavo.dc/cars/q/cutout
- Title:
- CARS image cutouts
- Short Name:
- CARS_cutout
- Date:
- 23 Mar 2022 13:13:18
- Publisher:
- The GAVO DC team
- Description:
- Images and data from from the CFHTLS archive research survey, a multi-band dataset spanning 37 square degrees of sky in high galactic latitudes.
- ID:
- ivo://org.gavo.dc/fornax/q/c
- Title:
- Deep Mosaic of the Fornax cluster core
- Short Name:
- fornax cutout
- Date:
- 27 Feb 2023 14:52:21
- Publisher:
- The GAVO DC team
- Description:
- This is a deep optical mosaic of the Fornax cluster’s core, covering 1.6 square degrees. The data were acquired with ESO/MPG 2.2m/WFI, using a transparent filter that nearly equals the no-filter throughput and thus provides a high signal-to-noise ratio. Based on an approximate conversion to V-band magnitudes, the unbinned and binned mosaics (0.24 and 0.71 arcsec/pixel) reach a median depth of 26.6 and 27.8 mag/sq.arcsec, respectively.
- ID:
- ivo://org.gavo.dc/dfbs/q/i
- Title:
- Digitized First Byurakan Survey (DFBS) Plate Scans
- Short Name:
- DFBS plates
- Date:
- 05 Jan 2023 13:10:51
- Publisher:
- The GAVO DC team
- Description:
- First Byurakan survey plate scan service
- ID:
- ivo://padc.obspm.astro/dfbs/q/i
- Title:
- Digitized First Byurakan Survey (DFBS) Plate Scans
- Short Name:
- DFBS plates
- Date:
- 26 Feb 2021 10:16:00
- Publisher:
- Paris Astronomical Data Centre
- Description:
- First Byurakan survey plate scan service
- ID:
- ivo://byu.arvo/dfbs/q/i
- Title:
- Digitized First Byurakan Survey (DFBS) Plate Scans
- Short Name:
- DFBS plates
- Date:
- 21 Feb 2020 09:52:13
- Publisher:
- The staff at the ArVO Data Center
- Description:
- First Byurakan survey plate scan service
- ID:
- ivo://padc.obspm.astro/esor/q/i
- Title:
- ESO survey digitized by MAMA
- Short Name:
- POSSE
- Date:
- 07 Apr 2022 17:14:46
- Publisher:
- Paris Astronomical Data Centre
- Description:
- Pallomar Observatory plate scan service
- ID:
- ivo://org.gavo.dc/__system__/siap2/sitewide
- Title:
- GAVO Data Center SIAP Version 2 Service
- Short Name:
- GAVO DC SIA2
- Date:
- 07 Feb 2024 00:41:32
- Publisher:
- The GAVO DC team
- Description:
- The GAVO Data Center's sitewide SIAP version 2 service publishes all the images published through the site. For more advanced queries including uploads, all this data is also available through ObsTAP.
- ID:
- ivo://org.gavo.dc/lswscans/res/positions/siap
- Title:
- HDAP -- Heidelberg Digitized Astronomical Plates
- Short Name:
- hdap_siap
- Date:
- 31 Oct 2023 19:15:05
- Publisher:
- The GAVO DC team
- Description:
- Scans of plates kept at Landessternwarte Heidelberg-Königstuhl. They were obtained at location, at the German-Spanish Astronomical Center (Calar Alto Observatory), Spain, and at La Silla, Chile. The plates cover a time span between 1880 and 1999. Specifically, HDAP is essentially complete for the plates taken with the Bruce telescope, the Walz reflector, and Wolf's Doppelastrograph at both the original location in Heidelberg and its later home on Königstuhl.
- ID:
- ivo://org.gavo.dc/hppunion/q/im
- Title:
- Historical Photographic Plate Image Archive
- Short Name:
- hpp_web
- Date:
- 23 Mar 2022 13:13:04
- Publisher:
- The GAVO DC team
- Description:
- GAVO's historical photographic plate archive (GHHPA) is a collection of various digitized historical photographic plates. It currently exposes: * the scans of plates of selected Kapteyn special fields obtained at Potsdam * the Palomar-Leiden Trojan surveys, 1960-1977, * a collection of plates obtained at Boyden Station, South Africa, kept at various German observatories. Other plate collections kept by GAVO include the Heidelberg Digitized Astronomical Plates HDAP, ivo://org.gavo.dc/lswscans/res/positions/siap, and the APPLAUSE database from Potsdam.
- ID:
- ivo://org.gavo.dc/lensunion/q/im
- Title:
- Lens Image Archive
- Short Name:
- lenses_web
- Date:
- 23 Mar 2022 13:13:10
- Publisher:
- The GAVO DC team
- Description:
- A collection of images of lensed quasars from various sources. Included are images from Maidanak Observatory (ivo://org.gavo.dc/maidanak/res/rawframes/siap), Apache Point Observatory, from the MiNDSTEp project (ivo://org.gavo.dc/danish/red/q), and from the Liverpool Robotic Telescope (ivo://org.gavo.dc/liverpool/res/rawframes/q).
- ID:
- ivo://org.gavo.dc/liverpool/res/rawframes/rawframes
- Title:
- Liverpool Quasar Lens Monitoring
- Short Name:
- liverpool.rawfra
- Date:
- 20 Apr 2023 00:19:47
- Publisher:
- The GAVO DC team
- Description:
- This collection includes optical monitorings of gravitationally lensed quasars. The frames can be used to make light curves of quasar images and field objects. From quasar light curves, one may measure time delays and flux ratios, analyse variability and chromaticity, etc. These direct analyses/measurements are basic tools for different astrophysical studies, e.g., expansion rate of the Universe, mechanism of intrinsic variability in quasars, accretion disk structure, supermassive black holes, dark halos of galaxies (dust, collapsed dark matter, smoothly distributed dark matter,...)
- ID:
- ivo://astron.nl/lolss/q/cutout
- Title:
- LoLSS - Image Cutout Service
- Short Name:
- LoLSS Cutout
- Date:
- 02 Feb 2023 15:08:05
- Publisher:
- ASTRON
- Description:
- This service provides cutouts from the images of the LOFAR LBA Sky Survey (LoLSS).
- ID:
- ivo://astron.nl/hetdex/lotss-dr1-img/imgs
- Title:
- LoTSS-DR1 Image Archive
- Short Name:
- LoTSS-DR1 images
- Date:
- 12 Nov 2021 16:37:07
- Publisher:
- ASTRON
- Description:
- This service queries the catalog of images 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://astron.nl/hetdex/lotss-dr1-img/cutout
- Title:
- LoTSS-DR1 Image Cutout Service
- Short Name:
- LoTSS-DR1 Cutout
- Date:
- 12 Nov 2021 16:37:07
- Publisher:
- ASTRON
- Description:
- This service provides cutouts from the images of 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://astron.nl/lotss_dr2/q/query_mosaics
- Title:
- LoTSS-DR2 mosaics
- Short Name:
- "Mosaics"
- 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 images.