2002A&A...389L..57P


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.16CEST15:49:30

2002A&A...389L..57P - Astronomy and Astrophysics, volume 389, L57-60 (2002/7-2)

Bias and consistency in time delay estimation methods: Case of the double quasar HE 1104-1805.

PELT J., REFSDAL S. and STABELL R.

Abstract (from CDS):

We present a short re-evaluation of a recently published time delay estimate for the gravitational lens system HE 1104-1805 with emphasis on important methodological aspects: bias of the statistics, inconsistency of the methods and use of the purposeful selection of data points (or so-called ``cleaning'') at the preprocessing stage. We show how the inadequate use of simple analysis methods can lead to too strong conclusions. Our analysis shows that there are indications for the time delay in HE 1104-1805 to be between -0.9 and -0.7 years, but still with a large uncertainty.

Abstract Copyright:

Journal keyword(s): gravitational lensing - quasars: individual: HE 1104-1805 - methods: data analysis

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 7C 095757.60+560823.00 QSO 10 01 20.6915852239 +55 53 55.595776916   17.16 16.95     ~ 697 3
2 QSO B1104-181 QSO 11 06 33.39 -18 21 23.8   15.8 15.9 15.7   ~ 301 1

    Equat.    Gal    SGal    Ecl

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2020.07.16-15:49:30

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