Abstract
The density of stars and MACHOs in the universe could theoretically be determined or limited by simultaneous measurements of compact sources by well separated observers. A gravitational lens effect would be expected to create a slight differential amplification between the observers detectable with sufficiently sensitive relative photometry: 'lensing parallax'. When applied to expanding fireballs such as those from GRBs and supernovae, the mass of the lens can be indicated by the end of lensing parallax, when the angular size of the source becomes much greater than the angular size of the Einstein ring of the lens.
Similar content being viewed by others
References
Alcock, C., et al.: 1996, Astrophys. J. 461, 84.
Costa, E., et al.: 1997, Nature 387, 783.
Gould, A.: 1992, Astrophys. J. 392, 442.
Gould, A.: 1994, Astrophys. J. 421, L75.
Gould, A.: 1995, Astrophys. J. 441, L21.
Grieger, B., Kayser, R. and Refsdal, S.: 1986, Nature 324, 126.
Klebesadel, R., Strong, I.B. and Olson, R.A.: 1973, Astrophys. J. Lett. 182, L85.
Loeb, A. and Perna, Astrophys. J. 495, 597.
Marani, G.F.: 1997, Ph D. thesis, George Mason University.
Marani, G.F., et al.: 1998, in preparation.
Metzger, M.R., et al.: 1997, Nature 387, 878.
Nemiroff, R.J.: 1989, Astrophys. J. 341, 579.
Nemiroff, R.J., et al.: 1993, Astrophys. J. 414, 36.
Nemiroff, R.J. and Gould, A.: 1995, Astrophys. J. 452, L111.
Nemiroff, R.J., Norris, J.P., Bonnell, J.T. and Marani, G.F.: 1998, Astrophys. J., 494, L173.
Paczynski, B.: 1986, Astrophy. J. 304, 1.
Refsdal, S.: 1966, Mon. Not. R. Astron. Soc. 134, 315.
van Paradijs, J., et al.: 1997, Nature 386, 686.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Nemiroff, R.J. Attributes of Gravitational Lensing Parallax. Astrophysics and Space Science 259, 309–315 (1998). https://doi.org/10.1023/A:1001769807077
Issue Date:
DOI: https://doi.org/10.1023/A:1001769807077