Letter to the editor (Scientific journals)
The geometry of the quadruply imaged quasar PG 1115+080: implications for H_0_.
Courbin, F.; Magain, Pierre; Keeton, C. R. et al.
1997In Astronomy and Astrophysics, 324, p. 1-L4
Peer Reviewed verified by ORBi
 

Files


Full Text
Courbin_1997_AA324_L1.pdf
Publisher postprint (181.7 kB)
Download

The authors thank EDP Sciences for their deposit authorization.


All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
GRAVITATIONAL LENSING; DATA ANALYSIS
Abstract :
[en] Time delay measurements have recently been reported for the lensed quasar PG 1115+080. These measurements can be used to derive H_0_, but only if we can constrain the lensing potential. We have applied a recently developed deconvolution technique to analyze sub-arcsecond I band images of PG 1115+080, obtained at the Nordic Optical Telescope (NOT) and the Canada France Hawaii Telescope (CFHT). The high performance of the deconvolution code allows us to derive precise positions and magnitudes for the four lensed images of the quasar, as well as for the lensing galaxy. The new measurement of the galaxy position improves its precision by a factor of 3 and thus strengthens the constraints on the lensing potential. With the new data, a range of models incorporating some of the plausible systematic uncertainties yields H_0_=53^+10^_-7_km/s/Mpc.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Courbin, F.
Magain, Pierre  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image
Keeton, C. R.
Kochanek, C. S.
Vanderriest, C.
Jaunsen, A. O.
Hjorth, J.
Language :
English
Title :
The geometry of the quadruply imaged quasar PG 1115+080: implications for H_0_.
Publication date :
01 August 1997
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences, Les Ulis, France
Volume :
324
Pages :
L1-L4
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 21 January 2010

Statistics


Number of views
59 (1 by ULiège)
Number of downloads
50 (1 by ULiège)

Scopus citations®
 
39
Scopus citations®
without self-citations
26

Bibliography


Similar publications



Contact ORBi