The Cosmic Lens All‐Sky Survey–II. Gravitational lens candidate selection and follow‐up IWA Browne, PN Wilkinson, NJF Jackson, ST Myers, CD Fassnacht, ...
Monthly Notices of the Royal Astronomical Society 341 (1), 13-32, 2003
402 2003 Time delay for the gravitational lens system B0218+ 357 AD Biggs, IWA Browne, P Helbig, LVE Koopmans, PN Wilkinson, ...
Monthly Notices of the Royal Astronomical Society 304 (2), 349-358, 1999
237 1999 Constraints on cosmological parameters from the analysis of the Cosmic Lens All Sky Survey radio-selected gravitational lens statistics KH Chae, AD Biggs, RD Blandford, IWA Browne, AG De Bruyn, ...
Physical Review Letters 89 (15), 151301, 2002
180 2002 Investigating the sensitivity of the atmospheric general circulation model ECHAM 3 to paleoclimatic boundary conditions S Lorenz, B Grieger, P Helbig, K Herterich
Geologische Rundschau 85 (3), 513-524, 1996
110 1996 A general and practical method for calculating cosmological distances R Kayser, P Helbig, T Schramm
Astronomy and Astrophysics 318 (3), 680-686, 1997
105 1997 Gravitational lensing statistics with extragalactic surveys . II. Analysis of the Jodrell Bank-VLA Astrometric Survey P Helbig, D Marlow, R Quast, PN Wilkinson, IWA Browne, LVE Koopmans
Astronomy and Astrophysics Supplement Series 136 (2), 297-305, 1999
68 1999 A new quadruple gravitational lens system: CLASS B0128+ 437 PM Phillips, MA Norbury, LVE Koopmans, IWA Browne, NJ Jackson, ...
Monthly Notices of the Royal Astronomical Society 319 (2), L7-L11, 2000
46 2000 Gravitational lensing statistics with extragalactic surveys. I. a lower limit on the cosmological constant R Quast, P Helbig
Astronomy and Astrophysics 344 (3), 721-734, 1999
38 1999 Lensing galaxies: light or dark? N Jackson, P Helbig, IWA Browne, CD Fassnacht, LVE Koopmans, ...
Astronomy and Astrophysics 334 (2), L33-L36, 1998
38 1998 Can microlensing explain the long-term optical variability of quasars? E Zackrisson, N Bergvall, T Marquart, P Helbig
Astronomy and Astrophysics 408 (1), 17-25, 2003
35 2003 Is there a flatness problem in classical cosmology? P Helbig
Monthly Notices of the Royal Astronomical Society 421 (1), 561-569, 2012
26 2012 CLASS B0827+ 525: Dark lens' or binary radio-loud quasar? LVE Koopmans, AG De Bruyn, CD Fassnacht, DR Marlow, D Rusin, ...
Astronomy and Astrophysics 361 (3), 815-822, 2000
23 2000 Gravitational lensing statistics with extragalactic surveys. III. Joint constraints on lambda_0 and Omega_0 from lensing statistics and the mz relation for type Ia supernovae P Helbig
Astronomy and Astrophysics 350 (1), 1-8, 1999
21 1999 Cosmological parameters and the redshift distribution of gravitational lenses P Helbig, R Kayser
Astronomy and Astrophysics 308 (2), 359-367, 1995
19 1995 Constraining Dark Matter with the Long-Term Variability of Quasars E Zackrisson, N Bergvall, P Helbig
Lighthouses of the Universe: The Most Luminous Celestial Objects and Their …, 2002
17 * 2002 The m-z relation for type Ia supernovae, locally inhomogeneous cosmological models, and the nature of dark matter P Helbig
Monthly Notices of the Royal Astronomical Society 451 (2), 2097--2107, 2015
13 2015 The Δθ–zs relation for gravitational lenses as a cosmological test P Helbig
Monthly Notices of the Royal Astronomical Society 298 (2), 395-398, 1998
12 1998 The flatness problem and the age of the Universe P Helbig
Monthly Notices of the Royal Astronomical Society 495 (4), 3571--3575, 2020
11 2020 The - Relation as a Cosmological Test P Helbig
Large Scale Structure: Tracks and Traces, 319-320, 1998
11 * 1998 The Cosmic Lens All‐Sky Survey parent population–I. Sample selection and number counts JP McKean, IWA Browne, NJ Jackson, CD Fassnacht, P Helbig
Monthly Notices of the Royal Astronomical Society 377 (1), 430-440, 2007
10 2007