Gravitational Lenses: Proceedings of a Conference Held in Hamburg, Germany 9–13 September 1991

Martin J. Rees (auth.), Rainer Kayser, Thomas Schramm, Lars Nieser (eds.)3540557970, 9783540557975, 0387557970

One of the most spectacular predictions of Einstein’s theory of general relativity is the occurrence of gravitational lenses in our galactic system.Nowadays the mastering of the mathematics together with the technology available to astronomers allow Einstein’s prediction to be confirmed. Several reviews here give the reader the chance to under- stand the basic theoretical concept of gravitational lensing and to obtain an overview of observational work. The present state of the field and latest results are given in a large number of specialized papers. Anextensive source and subject index make these proceedings valuable also as areference book for all researchers active in the field.

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Table of contents :
The impact of gravitating lensing on astrophysics….Pages 1-11
Introduction to basic concepts of gravitational lensing….Pages 12-26
Optical observations of gravitational lenses….Pages 27-43
Recent radio observations of gravitational lenses….Pages 44-49
Old faithful: The venerable gravitational lens system 0957+561….Pages 50-60
Determining the Hubble parameter….Pages 61-66
Time delay determination for the first gravitational lens Q0957+561 A,B….Pages 67-72
Photometric monitoring of gravitational lenses with the nordic optical telescope….Pages 73-79
A search for closely-spaced gravitational lenses….Pages 80-82
A high-resolution imaging survey for gravitational lenses….Pages 83-87
Search for gravitational lensing in a sample of highly luminous quasars….Pages 88-96
Bidimensional spectrography of multiple quasars….Pages 97-106
Sizing up the universe with an optical illusion: Comments on the measurement of Δ t in Q 0957+561….Pages 107-111
HST observations of G2237+0305 and PG1115+080….Pages 112-116
A star-formation region in 2237+030….Pages 117-121
Redshift measurements of the brightest cluster galaxies of the gravitational lens 0957+561….Pages 122-127
The Triple Quasar PG1115+080….Pages 128-133
1830-211 as a lens artefact….Pages 134-139
0218+357: The smallest separation lensed system….Pages 140-142
Gravitational microlensing….Pages 143-155
The search for massive compact halo objects….Pages 156-162
Probing the galactic disk with gravitational microlensing….Pages 163-163
Searching for microlensing in optical lightcurves of quasars….Pages 164-172
The Hamburg quasar monitoring program at Calar Alto….Pages 173-177
Microlensing predictions for the Einstein cross 2237+0305….Pages 178-182
Expected color variations of the microlensed QSO 2237+0305….Pages 183-188
Intrinsic variability implications for microlensing….Pages 189-195
Gravitational lensing statistics….Pages 196-208
Quasar-galaxy associations….Pages 209-221
Associations between QSOs and galaxies….Pages 222-229
Quasar-galaxy associations….Pages 230-236
Einstein rings and related phenomena….Pages 237-244
Observational indications for statistical lensing by clusters of galaxies….Pages 245-249
Counts of galaxies around distant highly luminous QSOs….Pages 250-255
A search for close separation (≲ 1″) quasar images….Pages 256-263
Joint discussion on quasar-galaxy associations….Pages 264-266
Luminous arcs: An observational update….Pages 267-278
Cluster gravitational lenses….Pages 279-287
Deep galaxy surveys….Pages 288-297
Statistical lensing by clusters of galaxies and Dark Matter distribution….Pages 298-304
Observation and analysis of Abell 2218 arcs and rings….Pages 305-311
New results on Abell 963 and MG1131+0456….Pages 312-317
On the straight arc in A2390….Pages 318-322
A search for gravitational lenses using sky survey plate scans….Pages 323-327
Gravitational lensing of BL Lac objects and related AGN….Pages 328-332
Recent observations of PKS1830-211….Pages 333-337
Possible test for Λ with gravitational lenses….Pages 338-344
Gravitational lensing by large-scale structures….Pages 345-349
Concluding summary….Pages 350-361
Spectrography in the 0957+561 field….Pages 362-362
Gravitational lensing in alternative cosmological models….Pages 363-363
Possibilities for observing lensing effects in the gravitational field of our galaxy….Pages 364-364
The appearance of cross-like quasar images and the estimation of GL parameters….Pages 365-365
Gravitational lensing properties of the Reissner-Nordström type neutron star….Pages 366-366
A search for the optical counterpart of the Einstein ring PKS 1830-211….Pages 367-367
Local behavior of caustics in different lens models….Pages 368-368
Multiple imaging by gravitational waves….Pages 369-369
Statistical lensing by extended lenses….Pages 370-370
VLBI hybrid maps of 0957+561 A,B….Pages 371-373
Deformation of P Cygni line profiles by gravitational microlensing effects….Pages 373-373
Statistical lensing and the overdensity of QSO near foreground galaxies….Pages 374-374
A moving gravitational lens in the Friedmann universe….Pages 375-375
Strong microlensing and BL LAC objects….Pages 376-376
Dispersive effects in the spectra of QSO pairs….Pages 377-377
Our galactic nucleus through the lens’s eye of gravity….Pages 378-378
Unobserved lensing agents….Pages 379-379
Discordant redshifts in compact groups of galaxies….Pages 380-380
An analytical approach to quasar variability due to microlensing….Pages 381-381
Morse theory and gravitational microlensing….Pages 382-382
N-body techniques for μ -lensing….Pages 383-383
Statistics of lensing by clusters of galaxies: Giant luminous arcs….Pages 384-384
Spherical opaque gravitational lens models and their implication for Ω 0 ….Pages 385-385
Catastrophe theory and stable images and caustics in gravitational lenses….Pages 386-386
List of contributions not submitted for inclusion….Pages 387-388