| apertif_dr1.beam_cubes | Table Info | N/A | N/A |
| apertif_dr1.calibrated_visibilities | Table Info | N/A | N/A |
| apertif_dr1.continuum_images | Table Info | N/A | N/A |
| apertif_dr1.flux_cal_visibilities | Table Info | N/A | N/A |
| apertif_dr1.pol_cal_visibilities | Table Info | N/A | N/A |
| apertif_dr1.pol_cubes | Table Info | N/A | N/A |
| apertif_dr1.raw_visibilities | Table Info | N/A | N/A |
| apertif_dr1.source_catalog | Table Info | N/A | N/A |
| apertif_dr1.spectral_cubes | Table Info | N/A | N/A |
| apertif_dr_bootes.images | Table Info | Continuum mosaic image and catalog of the Bootes field | Continuum mosaic image and catalog of the Bootes field |
| apertif_dr_bootes.source_catalog | Table Info | Continuum mosaic image and catalog of the Bootes field | Continuum mosaic image and catalog of the Bootes field |
| arts_dr1.frb_det | Table Info | This is the release of data from the Apertif Radio Transient System
(ARTS), a supercomputing radio-telescope instrument that performs
real-time FRB detection and localisation on the Westerbork Synthesis
Radio Telescope (WSRT) interferometer. It reaches coherent-addition
sensitivity over the entire field of the view of the primary- dish
beam. After commissioning results verified the system performed as
planned, we initiated the Apertif FRB survey (ALERT). Over the first 5
weeks we observed at design sensitivity in 2019, we detected 5 new
FRBs, and interferometrically localised each of these to 0.4−10 sq.
arcmin. All detections are broad band and very narrow, of order 1 ms
duration, and unscattered. Dispersion measures are generally high. | This is the release of data from the Apertif Radio Transient System
(ARTS), a supercomputing radio-telescope instrument that performs
real-time FRB detection and localisation on the Westerbork Synthesis
Radio Telescope (WSRT) interferometer. It reaches coherent-addition
sensitivity over the entire field of the view of the primary- dish
beam. After commissioning results verified the system performed as
planned, we initiated the Apertif FRB survey (ALERT). Over the first 5
weeks we observed at design sensitivity in 2019, we detected 5 new
FRBs, and interferometrically localised each of these to 0.4−10 sq.
arcmin. All detections are broad band and very narrow, of order 1 ms
duration, and unscattered. Dispersion measures are generally high. |
| arts_dr1.frb_obs | Table Info | This is the release of data from the Apertif Radio Transient System
(ARTS), a supercomputing radio-telescope instrument that performs
real-time FRB detection and localisation on the Westerbork Synthesis
Radio Telescope (WSRT) interferometer. It reaches coherent-addition
sensitivity over the entire field of the view of the primary- dish
beam. After commissioning results verified the system performed as
planned, we initiated the Apertif FRB survey (ALERT). Over the first 5
weeks we observed at design sensitivity in 2019, we detected 5 new
FRBs, and interferometrically localised each of these to 0.4−10 sq.
arcmin. All detections are broad band and very narrow, of order 1 ms
duration, and unscattered. Dispersion measures are generally high. | This is the release of data from the Apertif Radio Transient System
(ARTS), a supercomputing radio-telescope instrument that performs
real-time FRB detection and localisation on the Westerbork Synthesis
Radio Telescope (WSRT) interferometer. It reaches coherent-addition
sensitivity over the entire field of the view of the primary- dish
beam. After commissioning results verified the system performed as
planned, we initiated the Apertif FRB survey (ALERT). Over the first 5
weeks we observed at design sensitivity in 2019, we detected 5 new
FRBs, and interferometrically localised each of these to 0.4−10 sq.
arcmin. All detections are broad band and very narrow, of order 1 ms
duration, and unscattered. Dispersion measures are generally high. |
| arts_dr2.frb_det | Table Info | This is the final, full data release from the Apertif Radio Transient
System (ARTS), a supercomputing radio-telescope instrument that
performed real-time FRB detection and localisation on the Westerbork
Synthesis Radio Telescope (WSRT) interferometer. It reached
coherent-addition sensitivity over the entire field of the view of the
primary- dish beam. The Apertif FRB survey (ALERT) detected 24 new
FRBs, and interferometrically localised each of these to 0.4−10 sq.
arcmin. All detections are broad band and very narrow, of order 1 ms
duration, with high dispersion measures. | This is the final, full data release from the Apertif Radio Transient
System (ARTS), a supercomputing radio-telescope instrument that
performed real-time FRB detection and localisation on the Westerbork
Synthesis Radio Telescope (WSRT) interferometer. It reached
coherent-addition sensitivity over the entire field of the view of the
primary- dish beam. The Apertif FRB survey (ALERT) detected 24 new
FRBs, and interferometrically localised each of these to 0.4−10 sq.
arcmin. All detections are broad band and very narrow, of order 1 ms
duration, with high dispersion measures. |
| arts_dr2.frb_obs | Table Info | This is the final, full data release from the Apertif Radio Transient
System (ARTS), a supercomputing radio-telescope instrument that
performed real-time FRB detection and localisation on the Westerbork
Synthesis Radio Telescope (WSRT) interferometer. It reached
coherent-addition sensitivity over the entire field of the view of the
primary- dish beam. The Apertif FRB survey (ALERT) detected 24 new
FRBs, and interferometrically localised each of these to 0.4−10 sq.
arcmin. All detections are broad band and very narrow, of order 1 ms
duration, with high dispersion measures. | This is the final, full data release from the Apertif Radio Transient
System (ARTS), a supercomputing radio-telescope instrument that
performed real-time FRB detection and localisation on the Westerbork
Synthesis Radio Telescope (WSRT) interferometer. It reached
coherent-addition sensitivity over the entire field of the view of the
primary- dish beam. The Apertif FRB survey (ALERT) detected 24 new
FRBs, and interferometrically localised each of these to 0.4−10 sq.
arcmin. All detections are broad band and very narrow, of order 1 ms
duration, with high dispersion measures. |
| hetdex.hetdex_images | Table Info | 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. | 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. |
| hetdex.main | Table Info | 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. | 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. |
| hetdex.main_merged | Table Info | 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. | 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. |
| ivoa.ObsCore | Table Info | The IVOA-defined obscore table, containing generic metadata for
datasets within this datacenter. | Definition and support code for the ObsCore data model and table. |
| lbcs.main | Table Info | This service queries the catalog of calibrators from the LOFAR
Long-Baseline Calibrator Survey (LBCS). The LBCS aims to identify
sources suitable for calibrating the highest-resolution observations
made with the International LOFAR Telescope, which include baselines
>1000 km. Suitable sources must contain significant correlated flux
density (>50 − 100 mJy) at frequencies around 110–190 MHz on scales of
a few hundred milliarcseconds. | This service queries the catalog of calibrators from the LOFAR
Long-Baseline Calibrator Survey (LBCS). The LBCS aims to identify
sources suitable for calibrating the highest-resolution observations
made with the International LOFAR Telescope, which include baselines
>1000 km. Suitable sources must contain significant correlated flux
density (>50 − 100 mJy) at frequencies around 110–190 MHz on scales of
a few hundred milliarcseconds. |
| lofartier1.img_main | Table Info | This service queries the catalog of images from the LOFAR HBA Tier-1
preliminary data release (LoTSS-PDR). This data release contains
images and catalogs that characterise the low-frequency radio emission
in the region of the HETDEX Spring Field. In excess of 40,000 sources
are detected in the images that cover an area of over 350 square
degrees, have a resolution of 25 arcsec, and typical noise levels of
less than 0.5 mJy/beam. | This service queries the catalog of images from the LOFAR HBA Tier-1
preliminary data release (LoTSS-PDR). This data release contains
images and catalogs that characterise the low-frequency radio emission
in the region of the HETDEX Spring Field. In excess of 40,000 sources
are detected in the images that cover an area of over 350 square
degrees, have a resolution of 25 arcsec, and typical noise levels of
less than 0.5 mJy/beam. |
| lofartier1.main | Table Info | This service queries the catalog of radio sources from the LOFAR HBA
Tier-1 preliminary data release (LoTSS-PDR). This data release
contains images and catalogs that characterise the low-frequency radio
emission in the region of the HETDEX Spring Field. In excess of 40,000
sources are detected in the images that cover an area of over 350
square degrees, have a resolution of 25 arcsec, and typical noise
levels of less than 0.5 mJy/beam. | This service queries the catalog of radio sources from the LOFAR HBA
Tier-1 preliminary data release (LoTSS-PDR). This data release
contains images and catalogs that characterise the low-frequency radio
emission in the region of the HETDEX Spring Field. In excess of 40,000
sources are detected in the images that cover an area of over 350
square degrees, have a resolution of 25 arcsec, and typical noise
levels of less than 0.5 mJy/beam. |
| lolss.mosaic | Table Info | This page provides public access to the LBA survey of HETDEX, as a
single mosaic over the HETDEX field and associated catalogue, covering
around 700 square degrees centered in the RA range 10h45m00s to
15h30m00s and DEC range 45d00m00s to 57d00m00s. 25,247 sources are
detected and the rms noise level is around 4 mJy/beam at a resolution
of 47 arcsec and an effective frequency of 54 MHz. The flux scale
appears to be good based on a comparison with VLSS. | This page provides public access to the LBA survey of HETDEX, as a
single mosaic over the HETDEX field and associated catalogue, covering
around 700 square degrees centered in the RA range 10h45m00s to
15h30m00s and DEC range 45d00m00s to 57d00m00s. 25,247 sources are
detected and the rms noise level is around 4 mJy/beam at a resolution
of 47 arcsec and an effective frequency of 54 MHz. The flux scale
appears to be good based on a comparison with VLSS. |
| lolss.source_catalog | Table Info | This page provides public access to the LBA survey of HETDEX, as a
single mosaic over the HETDEX field and associated catalogue, covering
around 700 square degrees centered in the RA range 10h45m00s to
15h30m00s and DEC range 45d00m00s to 57d00m00s. 25,247 sources are
detected and the rms noise level is around 4 mJy/beam at a resolution
of 47 arcsec and an effective frequency of 54 MHz. The flux scale
appears to be good based on a comparison with VLSS. | This page provides public access to the LBA survey of HETDEX, as a
single mosaic over the HETDEX field and associated catalogue, covering
around 700 square degrees centered in the RA range 10h45m00s to
15h30m00s and DEC range 45d00m00s to 57d00m00s. 25,247 sources are
detected and the rms noise level is around 4 mJy/beam at a resolution
of 47 arcsec and an effective frequency of 54 MHz. The flux scale
appears to be good based on a comparison with VLSS. |
| lotss_dr2.main_gausses | Table Info | 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. | 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. |
| Tablename | Info | Table desc. | Res desc. |
|---|
| lotss_dr2.main_sources | Table Info | 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. | 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. |
| lotss_dr2.mosaics | Table Info | 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. | 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. |
| msss.img_main | Table Info | This service queries the archive of both LBA and HBA images from the
Multifrequency Snapshot Sky Survey (MSSS). This survey is the first
major observing program to be carried out with LOFAR during its
ongoing commissioning phase. | This service queries the archive of both LBA and HBA images from the
Multifrequency Snapshot Sky Survey (MSSS). This survey is the first
major observing program to be carried out with LOFAR during its
ongoing commissioning phase. |
| mvf.main | Table Info | 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◦). | 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◦). |
| mvf.msssvf_img_main | Table Info | This service queries the catalogue of both LBA and HBA images from
the Multifrequency Snapshot Sky Survey (MSSS). This survey is the
first major observing program to be carried out with LOFAR during its
ongoing commissioning phase. The Verification Field is a region of 100
square degrees centered at (15h,69◦). | This service queries the catalogue of both LBA and HBA images from
the Multifrequency Snapshot Sky Survey (MSSS). This survey is the
first major observing program to be carried out with LOFAR during its
ongoing commissioning phase. The Verification Field is a region of 100
square degrees centered at (15h,69◦). |
| sauron.main | Table Info | This table contains the catalogue of velocity field images from the
SAURON WSRT HI Survey. This project consists of deep Westerbork
Synthesis Radio Telescope observations of neutral hydrogen in 12
nearby elliptical and lenticular galaxies. The selected objects come
from a representative sample of nearby galaxies earlier studied at
optical wavelengths with the integral-field spectrograph SAURON
(Spectrographic Areal Unit for Research on Optical Nebulae). They are
field galaxies, or (in two cases) located in poor group environments. | This service queries the catalogue of observational data from the
SAURON WSRT HI Survey. This project consists of deep Westerbork
Synthesis Radio Telescope observations of neutral hydrogen in 12
nearby elliptical and lenticular galaxies. The selected objects come
from a representative sample of nearby galaxies earlier studied at
optical wavelengths with the integral-field spectrograph SAURON
(Spectrographic Areal Unit for Research on Optical Nebulae). They are
field galaxies, or (in two cases) located in poor group environments. |
| sauron.mom0 | Table Info | This table contains the catalogue of images from the SAURON WSRT HI
Survey. This project consists of deep Westerbork Synthesis Radio
Telescope observations of neutral hydrogen in 12 nearby elliptical and
lenticular galaxies. The selected objects come from a representative
sample of nearby galaxies earlier studied at optical wavelengths with
the integral-field spectrograph SAURON (Spectrographic Areal Unit for
Research on Optical Nebulae). They are field galaxies, or (in two
cases) located in poor group environments. | This service queries the catalogue of observational data from the
SAURON WSRT HI Survey. This project consists of deep Westerbork
Synthesis Radio Telescope observations of neutral hydrogen in 12
nearby elliptical and lenticular galaxies. The selected objects come
from a representative sample of nearby galaxies earlier studied at
optical wavelengths with the integral-field spectrograph SAURON
(Spectrographic Areal Unit for Research on Optical Nebulae). They are
field galaxies, or (in two cases) located in poor group environments. |
| svc.main | Table Info | This is a source catalog of the Apertif Science Verification Campaign
containing polarised sources in the L-Band in combination with
infrared and optical data. | This is a source catalog of the Apertif Science Verification Campaign
containing polarised sources in the L-Band in combination with
infrared and optical data. |
| tap_schema.columns | Table Info | Columns in tables available for ADQL querying. | Unnamed data center's Table Access Protocol (TAP) service with
table metadata. |
| tap_schema.groups | Table Info | Columns that are part of groups within tables available for ADQL
querying. | Unnamed data center's Table Access Protocol (TAP) service with
table metadata. |
| tap_schema.key_columns | Table Info | Columns participating in foreign key relationships between tables
available for ADQL querying. | Unnamed data center's Table Access Protocol (TAP) service with
table metadata. |
| tap_schema.keys | Table Info | Foreign key relationships between tables available for ADQL querying. | Unnamed data center's Table Access Protocol (TAP) service with
table metadata. |
| tap_schema.schemas | Table Info | Schemas containing tables available for ADQL querying. | Unnamed data center's Table Access Protocol (TAP) service with
table metadata. |
| tap_schema.tables | Table Info | Tables available for ADQL querying. | Unnamed data center's Table Access Protocol (TAP) service with
table metadata. |
| tgssadr.img_main | Table Info | This service queries the catalogue of images (5 def square mosaics)
from the images of the TIFR GMRT Sky Survey (TGSS) Alternative Data
Release (up to 1 deg square). This data release contains previously
unpublished data from the TIFR GMRT Sky Survey (TGSS), which has been
independently reprocessed. It includes continuum stokes I images of
99.5 percent of the radio sky north of -53° DEC (3.6π sr, or 90
percent of the full sky) at a resolution of 25“ x 25” north of 19° DEC
and 25“ x 25” / cos(DEC-19°) south of 19°, and a median noise of 3.5
mJy/beam. The extracted radio source catalog contains positions, flux
densities, sizes and more for 0.62 Million sources down to a 7-sigma
peak-to-noise threshold. | This service queries the catalogue of images (5 def square mosaics)
from the images of the TIFR GMRT Sky Survey (TGSS) Alternative Data
Release (up to 1 deg square). This data release contains previously
unpublished data from the TIFR GMRT Sky Survey (TGSS), which has been
independently reprocessed. It includes continuum stokes I images of
99.5 percent of the radio sky north of -53° DEC (3.6π sr, or 90
percent of the full sky) at a resolution of 25“ x 25” north of 19° DEC
and 25“ x 25” / cos(DEC-19°) south of 19°, and a median noise of 3.5
mJy/beam. The extracted radio source catalog contains positions, flux
densities, sizes and more for 0.62 Million sources down to a 7-sigma
peak-to-noise threshold. |
| tgssadr.main | Table Info | This service queries the catalogue of radio sources from the images
of the TIFR GMRT Sky Survey (TGSS) Alternative Data Release (up to 1
deg square). This data release contains previously unpublished data
from the TIFR GMRT Sky Survey (TGSS), which has been independently
reprocessed. It includes continuum stokes I images of 99.5 percent of
the radio sky north of -53° DEC (3.6π sr, or 90 percent of the full
sky) at a resolution of 25“ x 25” north of 19° DEC and 25“ x 25” /
cos(DEC-19°) south of 19°, and a median noise of 3.5 mJy/beam. The
extracted radio source catalog contains positions, flux densities,
sizes and more for 0.62 Million sources down to a 7-sigma
peak-to-noise threshold. | This service queries the catalogue of radio sources from the images
of the TIFR GMRT Sky Survey (TGSS) Alternative Data Release (up to 1
deg square). This data release contains previously unpublished data
from the TIFR GMRT Sky Survey (TGSS), which has been independently
reprocessed. It includes continuum stokes I images of 99.5 percent of
the radio sky north of -53° DEC (3.6π sr, or 90 percent of the full
sky) at a resolution of 25“ x 25” north of 19° DEC and 25“ x 25” /
cos(DEC-19°) south of 19°, and a median noise of 3.5 mJy/beam. The
extracted radio source catalog contains positions, flux densities,
sizes and more for 0.62 Million sources down to a 7-sigma
peak-to-noise threshold. |
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