- ID:
- ivo://CDS.VizieR/J/MNRAS/341/993
- Title:
- u_j_br photometry and redshifts of QSOs
- Short Name:
- J/MNRAS/341/993
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a detailed analysis of a sample of radio-detected quasars, obtained by matching together objects from the FIRST (<VIII/71>) survey and the 2dF Quasar Redshift Survey (2dF, <VII/223>). The data set consists of 113 sources, spanning a redshift range 0.35<~z<~2.2, with optical magnitudes 18.25<=bj<=20.85 and radio fluxes S_1.4GHz_>=1mJy. These objects exhibit properties such as redshift and colour distribution in full agreement with those derived for the whole quasar population, suggesting that the mechanism(s) controlling the birth and lifetime of quasars are independent of their level of radio emission. The long-debated question of the radio-loud/radio quiet (RL/RQ) dichotomy is then investigated for the combined FIRST-2dF and FIRST-LBQS (Large Bright Quasar Survey) samples, as they present similar selection criteria.
Number of results to display per page
Search Results
- ID:
- ivo://CDS.VizieR/II/316
- Title:
- UKIDSS-DR6 Galactic Plane Survey
- Short Name:
- II/316
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The UKIDSS Galactic Plane Survey (GPS) is one of the five near infrared Public Legacy Surveys that are being undertaken by the UKIDSS consortium, using the Wide Field Camera on the United Kingdom Infrared Telescope. It is surveying 1868 deg^2^ of the northern and equatorial Galactic plane at Galactic latitudes -5{deg}<b<5{deg} in the J, H and K filters and a ~300 deg^2^ area of the Taurus-Auriga-Perseus molecular cloud complex in these three filters and the 2.12{mu}m (1-0)S(1)H_2_ filter. It will provide data on ~ 3x10^9^ sources. The survey use the Wide Field Camera (WFCAM, see Casali et al. 2007A&A...467..777C) on the United Kingdom Infrared Telescope (UKIRT). The typical 90% completeness limits in uncrowded fields are K=18.0, H=18.75, J=19.5, with uncertainties of about 0.2mag.
22963. UKIDSS-DR7 Large Area Survey
- ID:
- ivo://CDS.VizieR/II/310
- Title:
- UKIDSS-DR7 Large Area Survey
- Short Name:
- II/310
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The UKIRT Infrared Deep Sky Survey (UKIDSS) is a large-scale near-IR survey which aim is to cover 7500 square degrees of the Northern sky. The survey is carried out using the Wide Field Camera (WFCAM), with a field of view of 0.21 square degrees, mounted on the 3.8m United Kingdom Infra-red Telescope (UKIRT) in Hawaii. The Large Area Survey (LAS) covers an area of 4000 square degrees in high Galactic latitudes (extragalactic) in the four bands Y(1.0um) J(1.2um) H(1.6um) and K(2.2um) to a depth of K = 18.4. Details of the survey can be found in the in the paper by Lawrence et al. (2007MNRAS.379.1599L)
- ID:
- ivo://CDS.VizieR/II/319
- Title:
- UKIDSS-DR9 LAS, GCS and DXS Surveys
- Short Name:
- II/319
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The UKIRT Infrared Deep Sky Survey (UKIDSS) is a large-scale near-IR survey which aim is to cover 7500 square degrees of the Northern sky. The survey is carried out using the Wide Field Camera (WFCAM), with a field of view of 0.21 square degrees, mounted on the 3.8m United Kingdom Infra-red Telescope (UKIRT) in Hawaii. The project comprises five surveys (LAS, GCS, DXS, GPS and UDS). The Large Area Survey (LAS) covers an area of 4000 square degrees in high Galactic latitudes (extragalactic) in the four bands Y(1.0um) J(1.2um) H(1.6um) and K(2.2um) to a depth of K=18.4. This release 9 includes proper motions for a fraction (~1/6) of the sources. The Galactic Clusters Survey (GCS) aims to survey ten large open star clusters and star formation associations, covering a total of 1067 square degrees in the five bands Z (0.9um), Y(1.0um) J(1.2um) H(1.6um) and K(2.2um), plus a second pass in K for proper motions, to a depth of Z=20.4, Y=20.3, J=19.5, H=18.6, K=18.6. This release 9 includes proper motions for a fraction (~1/4) of the sources. The Deep Extragalactic Survey (DXS) aims to map 35 square degrees of sky to a 5-{sigma} point-source sensitivity of J=22.3 and K=20.8 in four carefully selected, multi-wavelength survey areas. The central regions of each field will also be mapped to H=21.8. The primary aim of the survey is to produce a photometric galaxy sample at a redshift of 1-2, within a volume comparable to that of the SDSS, selected in the same passband (rest frame optical). Details of the surveys can be found in the in the paper by Lawrence et al. (2007MNRAS.379.1599L), and at the UKIDSS Surveys site (http://www.ukidss.org/surveys/surveys.html). The data described here represent a subset of the UKIDSS data, limited to the public data and most representative columns. In the "Byte-by-byte Description" below the original names of the columns are given as bracketed names.
- ID:
- ivo://CDS.VizieR/II/314
- Title:
- UKIDSS-DR8 LAS, GCS and DXS Surveys
- Short Name:
- II/314
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The UKIRT Infrared Deep Sky Survey (UKIDSS) is a large-scale near-IR survey which aim is to cover 7500 square degrees of the Northern sky. The survey is carried out using the Wide Field Camera (WFCAM), with a field of view of 0.21 square degrees, mounted on the 3.8m United Kingdom Infra-red Telescope (UKIRT) in Hawaii. The project comprises five surveys (LAS, GCS, DXS, GPS and UDS). The Large Area Survey (LAS) covers an area of 4000 square degrees in high Galactic latitudes (extragalactic) in the four bands Y(1.0um) J(1.2um) H(1.6um) and K(2.2um) to a depth of K=18.4. The Galactic Clusters Survey (GCS) aims to survey ten large open star clusters and star formation associations, covering a total of 1067 square degrees in the five bands Z (0.9um), Y(1.0um) J(1.2um) H(1.6um) and K(2.2um), plus a second pass in K for proper motions, to a depth of Z=20.4, Y=20.3, J=19.5, H=18.6, K=18.6. The Deep Extragalactic Survey (DXS) aims to map 35 square degrees of sky to a 5-{sigma} point-source sensitivity of J=22.3 and K=20.8 in four carefully selected, multi-wavelength survey areas. The central regions of each field will also be mapped to H=21.8. The primary aim of the survey is to produce a photometric galaxy sample at a redshift of 1-2, within a volume comparable to that of the SDSS, selected in the same passband (rest frame optical). Details of the surveys can be found in the in the paper by Lawrence et al. (2007MNRAS.379.1599L), and at the UKIDSS Surveys site (http://www.ukidss.org/surveys/surveys.html). The data described here represent a subset of the UKIDSS data, limited to the public data and most representative columns. In the "Byte-by-byte Description" below the original names of the columns are given as bracketed names.
22966. UKIDSS DR8 (Secure Access)
- ID:
- ivo://wfau.roe.ac.uk/ukidssDR8-v1/UKIDSS_DR8
- Title:
- UKIDSS DR8 (Secure Access)
- Date:
- 06 Oct 2010 16:30:56
- Publisher:
- WFAU
- Description:
- This DSA hosts data release 8 of the UKIRT Infrared Deep Sky Survey housed at the Wide Field Astronomy Unit at the Univeristy of Edinburgh. In order to access this data you need to contact Mark Holliman at msh@roe.ac.uk to be added to the authorized users list. This catalog contains WFCAM data primarily originating from the five UKIDSS surveys: Large Area Survey, Galactic Plane Survey, Galactic Clusters Survey, Deep Extragalactic Survey and the Ultra Deep Survey (see the www.ukidss.org for survey descriptions)
22967. UKIDSS DR8 (Secure Access)
- ID:
- ivo://wfau.roe.ac.uk/ukidssDR8-v1/UKIDSS_DR8/ceaApplication
- Title:
- UKIDSS DR8 (Secure Access)
- Date:
- 06 Oct 2010 16:30:56
- Publisher:
- WFAU
- Description:
- This DSA hosts data release 8 of the UKIRT Infrared Deep Sky Survey housed at the Wide Field Astronomy Unit at the Univeristy of Edinburgh. In order to access this data you need to contact Mark Holliman at msh@roe.ac.uk to be added to the authorized users list. This catalog contains WFCAM data primarily originating from the five UKIDSS surveys: Large Area Survey, Galactic Plane Survey, Galactic Clusters Survey, Deep Extragalactic Survey and the Ultra Deep Survey (see the www.ukidss.org for survey descriptions)
22968. UKIDSS DR11 SIAP Service
- ID:
- ivo://wfau.roe.ac.uk/ukidssDR11-siap
- Title:
- UKIDSS DR11 SIAP Service
- Short Name:
- UKIDSS DR11 SIAP
- Date:
- 16 Feb 2021 09:44:32
- Publisher:
- WFAU, Institute for Astronomy, University of Edinburgh
- Description:
- Simple image access to UKIDSS data release 11 images for the LAS, GCS, DXS, and UDS surveys.
22969. UKIDSS DR10 SIAP Service
- ID:
- ivo://wfau.roe.ac.uk/ukidssdr10-siap
- Title:
- UKIDSS DR10 SIAP Service
- Short Name:
- UKIDSS DR10 SIAP
- Date:
- 14 Aug 2019 10:48:18
- Publisher:
- WFAU, Institute for Astronomy, University of Edinburgh
- Description:
- Simple image access to UKIDSS data release 10 images for the LAS, GCS, DXS, and UDS surveys.
22970. UKIDSS DR9 SIAP Service
- ID:
- ivo://wfau.roe.ac.uk/ukidssdr9-siap
- Title:
- UKIDSS DR9 SIAP Service
- Short Name:
- UKIDSS DR9 SIAP
- Date:
- 09 Jul 2019 14:44:16
- Publisher:
- WFAU, Institute for Astronomy, University of Edinburgh
- Description:
- Simple image access to UKIDSS data release 9 images for the LAS, GCS, DXS, and UDS surveys.