- ID:
- ivo://astron.nl/apertif_elais/q/cone
- Title:
- Apertif Elais - Catalogue
- Short Name:
- Apertif Elais
- Date:
- 24 Feb 2025 08:45:55
- Publisher:
- ASTRON
- Description:
- Apertif is a phased-array feed system for the Westerbork SynthesisRadio Telescope (WSRT), operating at 1.4 GHz and providing forty instantaneous beams over 300 MHz of bandwidth. This data release includes the image of the ELAIS-N field observed with Apertif. The image covers 25 square degree region, has an angular resolution of 18x11 arcseconds and a median background noise of 37 μJy/beam. The corresponding source catalog, complete down to the 0.3 mJy level, includes 8526 sources. https://science.astron.nl/telescopes/wsrt-apertif/apertif-data-access/data-releases/apertif-single-fields/
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Search Results
1082. Apertif Elais - Mosaic
- ID:
- ivo://astron.nl/apertif_elais/q/cutout
- Title:
- Apertif Elais - Mosaic
- Short Name:
- Apertif Elais
- Date:
- 24 Feb 2025 08:45:55
- Publisher:
- ASTRON
- Description:
- Apertif is a phased-array feed system for the Westerbork Synthesis Radio Telescope (WSRT), operating at 1.4 GHz and providing forty instantaneous beams over 300 MHz of bandwidth. This data release includes the image of the ELAIS-N field observed with Apertif. The image covers 25 square degree region, has an angular resolution of 18x11 arcseconds and a median background noise of 37 μJy/beam. The corresponding source catalog, complete down to the 0.3 mJy level, includes 8526 sources. https://science.astron.nl/telescopes/wsrt-apertif/apertif-data-access/data-releases/apertif-single-fields/
- ID:
- ivo://astron.nl/apertif_lockman/q/cone
- Title:
- Apertif Lockman - Catalogue
- Short Name:
- Apertif Lockman
- Date:
- 24 Feb 2025 08:51:26
- Publisher:
- ASTRON
- Description:
- Apertif is a phased-array feed system for the Westerbork Synthesis Radio Telescope (WSRT), operating at 1.4 GHz and providing forty instantaneous beams over 300 MHz of bandwidth. This data release includes the image of the Lockman Hole field observed with Apertif. The image covers 136 square degree region, has an angular resolution of 15x13 arcseconds and a median background noise of 27 μJy/beam. The corresponding source catalog, complete down to the 0.3 mJy level, includes 55166 sources. https://science.astron.nl/telescopes/wsrt-apertif/apertif-data-access/data-releases/apertif-single-fields/
1084. Apertif Lockman - Mosaic
- ID:
- ivo://astron.nl/apertif_lockman/q/cutout
- Title:
- Apertif Lockman - Mosaic
- Short Name:
- Apertif Lockman
- Date:
- 24 Feb 2025 08:51:26
- Publisher:
- ASTRON
- Description:
- Apertif is a phased-array feed system for the Westerbork Synthesis Radio Telescope (WSRT), operating at 1.4 GHz and providing forty instantaneous beams over 300 MHz of bandwidth. This data release includes the image of the Lockman Hole field observed with Apertif. The image covers 136 square degree region, has an angular resolution of 15x13 arcseconds and a median background noise of 27 μJy/beam. The corresponding source catalog, complete down to the 0.3 mJy level, includes 55166 sources. https://science.astron.nl/telescopes/wsrt-apertif/apertif-data-access/data-releases/apertif-single-fields/
- ID:
- ivo://astron.nl/arts_dr2/q/det_cone
- Title:
- Apertif Time Domain FRB detection cone search (DR2)
- Short Name:
- Detected FRB
- Date:
- 31 Jul 2024 11:50:27
- Publisher:
- ASTRON
- Description:
- 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. Please note that the ARTS DR2 collection includes all data from the DR1 collection.
- ID:
- ivo://astron.nl/arts_dr1/q/det_cone
- Title:
- Apertif Time Domain FRB detection cone search (DR1)
- Short Name:
- Detected FRB
- Date:
- 31 Jul 2024 11:50:09
- Publisher:
- ASTRON
- Description:
- This is the first 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. Please note that the ARTS DR1 collection available from this end-point is superseded by the ARTS DR2 collection. DR2 includes all data from the DR1 collection that can be queried here. The ARTS DR2 FRB detection cone search can be reached at https://vo.astron.nl/arts_dr2/q/det_cone/form.
- ID:
- ivo://astron.nl/arts_dr2/q/obs_cone
- Title:
- Apertif Time Domain FRB observation cone search (DR2)
- Short Name:
- Observed FRBs
- Date:
- 31 Jul 2024 11:50:27
- Publisher:
- ASTRON
- Description:
- 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. Please note that the ARTS DR2 collection includes all data from the DR1 collection.
- ID:
- ivo://astron.nl/arts_dr1/q/obs_cone
- Title:
- Apertif Time Domain FRB observation cone search (DR1)
- Short Name:
- Observed FRBs
- Date:
- 31 Jul 2024 11:50:09
- Publisher:
- ASTRON
- Description:
- This is the first 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. Please note that the ARTS DR1 collection available from this end-point is superseded by the ARTS DR2 collection. DR2 includes all data from the DR1 collection that can be queried here. The ARTS DR2 FRB observation cone search can be reached at https://vo.astron.nl/arts_dr2/q/obs_cone/form.
- ID:
- ivo://CDS.VizieR/J/A+A/659/A89
- Title:
- Aperture-corrected SN Ia host properties
- Short Name:
- J/A+A/659/A89
- Date:
- 11 Mar 2022 07:19:46
- Publisher:
- CDS
- Description:
- We use type Ia supernova (SN Ia) data obtained by the Sloan Digital Sky Survey-II Supernova Survey (SDSS-II SNS) in combination with the publicly available SDSS DR16 fiber spectroscopy of supernova (SN) host galaxies to correlate SN Ia light-curve parameters and Hubble residuals with several host galaxy properties. Fixed-aperture fiber spectroscopy suffers from aperture effects: the fraction of the galaxy covered by the fiber varies depending on its projected size on the sky, and thus measured properties are not representative of the whole galaxy. The advent of integral field spectroscopy has provided a way to correct the missing light, by studying how these galaxy parameters change with the aperture size. Here we study how the standard SN host galaxy relations change once global host galaxy parameters are corrected for aperture effects. We recover previous trends on SN Hubble residuals with host galaxy properties, but we find that discarding objects with poor fiber coverage instead of correcting for aperture loss introduces biases into the sample that affect SN host galaxy relations. The net effect of applying the commonly used g-band fraction criterion is that intrinsically faint SNe Ia in high-mass galaxies are discarded, thus artificially increasing the height of the mass step by 0.02 mag and its significance. Current and next-generation fixed-aperture fiber-spectroscopy surveys, such as DES, DESI, or TiDES in 4MOST, that aim to study SN and galaxy correlations must consider, and correct for, these effects.
- ID:
- ivo://CDS.VizieR/J/ApJ/671/333
- Title:
- Aperture photometry in NGC 5194
- Short Name:
- J/ApJ/671/333
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We have studied the relationship between the star formation rate (SFR), surface density, and gas surface density in the spiral galaxy M51a (NGC 5194), using multiwavelength data obtained as part of the Spitzer Infrared Nearby Galaxies Survey (SINGS). We introduce a new SFR index based on a linear combination of Halpha emission-line and 24um continuum luminosities, which provides reliable extinction-corrected ionizing fluxes and SFR densities over a wide range of dust attenuations.
