An Optical Time Delay Estimate for the Double Gravitational Lens System B1600+434
peer reviewed We present optical I-band light curves of the gravitationally lensed double QSO B1600+434 from observations obtained at the Nordic Optical Telescope (NOT) between 1998 April and 1999 November. The photometry has been performed by simultaneous deconvolution of all the data frames, invol...
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Online Access: | https://orbi.uliege.be/handle/2268/2759 https://orbi.uliege.be/bitstream/2268/2759/1/Burud_2000_ApJ544_117.pdf https://doi.org/10.1086/317213 |
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ftorbi:oai:orbi.ulg.ac.be:2268/2759 2024-04-21T08:05:50+00:00 An Optical Time Delay Estimate for the Double Gravitational Lens System B1600+434 Burud, I. Hjorth, J. Jaunsen, A. O. Andersen, M. I. Korhonen, H. Clasen, J. W. Pelt, J. Pijpers, F. P. Magain, Pierre Østensen, R. 2000-11-01 https://orbi.uliege.be/handle/2268/2759 https://orbi.uliege.be/bitstream/2268/2759/1/Burud_2000_ApJ544_117.pdf https://doi.org/10.1086/317213 en eng University of Chicago Press http://adsabs.harvard.edu/abs/2000ApJ.544.117B urn:issn:0004-637X urn:issn:1538-4357 https://orbi.uliege.be/handle/2268/2759 info:hdl:2268/2759 https://orbi.uliege.be/bitstream/2268/2759/1/Burud_2000_ApJ544_117.pdf doi:10.1086/317213 scopus-id:2-s2.0-0034693532 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess Astrophysical Journal, 544, 117-122 (2000-11-01) Cosmology: Observations Cosmology: Distance Scale Galaxies: Spiral Cosmology: Gravitational Lensing quasars: individual (B1600+434) Physical chemical mathematical & earth Sciences Space science astronomy & astrophysics Physique chimie mathématiques & sciences de la terre Aérospatiale astronomie & astrophysique journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2000 ftorbi https://doi.org/10.1086/317213 2024-03-27T14:55:59Z peer reviewed We present optical I-band light curves of the gravitationally lensed double QSO B1600+434 from observations obtained at the Nordic Optical Telescope (NOT) between 1998 April and 1999 November. The photometry has been performed by simultaneous deconvolution of all the data frames, involving a numerical lens galaxy model. Four methods have been applied to determine the time delay between the two QSO components, giving a mean estimate of Deltat=51+/-4 days (95% confidence level). This is the fourth optical time delay ever measured. Adopting a Omega=0.3, Lambda=0 universe and using the mass model of Maller et al., this time delay estimate yields a Hubble parameter of H[SUB]0[/SUB]=52[SUP]+14[/SUP][SUB]-8[/SUB] km s[SUP]-1[/SUP] Mpc[SUP]-1[/SUP] (95% confidence level), where the errors include time delay as well as model uncertainties. There are time-dependent offsets between the two (appropriately shifted) light curves that indicate the presence of external variations due to microlensing. Based on observations made with the Nordic Optical Telescope, operated on the island of La Palma jointly by Denmark, Finland, Iceland, Norway, and Sweden, in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias. Article in Journal/Newspaper Iceland University of Liège: ORBi (Open Repository and Bibliography) The Astrophysical Journal 544 1 117 122 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Cosmology: Observations Cosmology: Distance Scale Galaxies: Spiral Cosmology: Gravitational Lensing quasars: individual (B1600+434) Physical chemical mathematical & earth Sciences Space science astronomy & astrophysics Physique chimie mathématiques & sciences de la terre Aérospatiale astronomie & astrophysique |
spellingShingle |
Cosmology: Observations Cosmology: Distance Scale Galaxies: Spiral Cosmology: Gravitational Lensing quasars: individual (B1600+434) Physical chemical mathematical & earth Sciences Space science astronomy & astrophysics Physique chimie mathématiques & sciences de la terre Aérospatiale astronomie & astrophysique Burud, I. Hjorth, J. Jaunsen, A. O. Andersen, M. I. Korhonen, H. Clasen, J. W. Pelt, J. Pijpers, F. P. Magain, Pierre Østensen, R. An Optical Time Delay Estimate for the Double Gravitational Lens System B1600+434 |
topic_facet |
Cosmology: Observations Cosmology: Distance Scale Galaxies: Spiral Cosmology: Gravitational Lensing quasars: individual (B1600+434) Physical chemical mathematical & earth Sciences Space science astronomy & astrophysics Physique chimie mathématiques & sciences de la terre Aérospatiale astronomie & astrophysique |
description |
peer reviewed We present optical I-band light curves of the gravitationally lensed double QSO B1600+434 from observations obtained at the Nordic Optical Telescope (NOT) between 1998 April and 1999 November. The photometry has been performed by simultaneous deconvolution of all the data frames, involving a numerical lens galaxy model. Four methods have been applied to determine the time delay between the two QSO components, giving a mean estimate of Deltat=51+/-4 days (95% confidence level). This is the fourth optical time delay ever measured. Adopting a Omega=0.3, Lambda=0 universe and using the mass model of Maller et al., this time delay estimate yields a Hubble parameter of H[SUB]0[/SUB]=52[SUP]+14[/SUP][SUB]-8[/SUB] km s[SUP]-1[/SUP] Mpc[SUP]-1[/SUP] (95% confidence level), where the errors include time delay as well as model uncertainties. There are time-dependent offsets between the two (appropriately shifted) light curves that indicate the presence of external variations due to microlensing. Based on observations made with the Nordic Optical Telescope, operated on the island of La Palma jointly by Denmark, Finland, Iceland, Norway, and Sweden, in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias. |
format |
Article in Journal/Newspaper |
author |
Burud, I. Hjorth, J. Jaunsen, A. O. Andersen, M. I. Korhonen, H. Clasen, J. W. Pelt, J. Pijpers, F. P. Magain, Pierre Østensen, R. |
author_facet |
Burud, I. Hjorth, J. Jaunsen, A. O. Andersen, M. I. Korhonen, H. Clasen, J. W. Pelt, J. Pijpers, F. P. Magain, Pierre Østensen, R. |
author_sort |
Burud, I. |
title |
An Optical Time Delay Estimate for the Double Gravitational Lens System B1600+434 |
title_short |
An Optical Time Delay Estimate for the Double Gravitational Lens System B1600+434 |
title_full |
An Optical Time Delay Estimate for the Double Gravitational Lens System B1600+434 |
title_fullStr |
An Optical Time Delay Estimate for the Double Gravitational Lens System B1600+434 |
title_full_unstemmed |
An Optical Time Delay Estimate for the Double Gravitational Lens System B1600+434 |
title_sort |
optical time delay estimate for the double gravitational lens system b1600+434 |
publisher |
University of Chicago Press |
publishDate |
2000 |
url |
https://orbi.uliege.be/handle/2268/2759 https://orbi.uliege.be/bitstream/2268/2759/1/Burud_2000_ApJ544_117.pdf https://doi.org/10.1086/317213 |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Astrophysical Journal, 544, 117-122 (2000-11-01) |
op_relation |
http://adsabs.harvard.edu/abs/2000ApJ.544.117B urn:issn:0004-637X urn:issn:1538-4357 https://orbi.uliege.be/handle/2268/2759 info:hdl:2268/2759 https://orbi.uliege.be/bitstream/2268/2759/1/Burud_2000_ApJ544_117.pdf doi:10.1086/317213 scopus-id:2-s2.0-0034693532 |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1086/317213 |
container_title |
The Astrophysical Journal |
container_volume |
544 |
container_issue |
1 |
container_start_page |
117 |
op_container_end_page |
122 |
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1796945204428668928 |