Erratum: ``Gravitational Lensing of the Farthest Known Supernova SN 1997ff'' (ApJ, 561, 106 [2001])

Details Erratum: ``Gravitational Lensing of the Farthest Known Supernova SN 1997ff'' (ApJ, 561, 106 [2001]) Erratum: ``Gravitational Lensing of the Farthest Known Supernova SN 1997ff'' (ApJ, 561, 106 [2001])

Jun 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003apj...589.1089m&link_type=abstract

The Astrophysical Journal, Volume 589, Issue 2, pp. 1089-1092.

Astronomy and Astrophysics

Astronomy

1

Errata, Addenda

Scientific paper

Because of a recently discovered bug in the code for computing the magnification and deflection angles, Figures 2, 3, and 4 are altered. The figures are not altered dramatically, and the conclusions remain.
The upper panel of the corrected Figure 2 shows very large magnifications for m*=1013 Msolar. In fact, for large enough velocity dispersion, the magnification diverges, indicating multiple imaging of the source. Since no second image of the host is observed, this combination of parameters can be excluded.
The discussion of the drops in the curve of the lower panel of Figure 3 is no longer relevant since they have disappeared.
Instead of the erroneous example in the lower right panel of Figure 4, we take a magnification of μ=2.1 in the iST band as an example, with a corresponding axis ratio of 0.47. This axis ratio is only about 1.5 times more rare than the intrinsic axis ratio of 0.85, according to D. G. Lambas, S. J. Maddox, & J. Loveday (MNRAS, 258, 1097 [1998]). From the corrected Figure 4 we still draw the conclusion that the intrinsic ellipticity has a mild dependence on the magnification and that it does not put any strong constraints on the level of magnification. Note that we have added an indication of the central point where the supernova is placed (where the magnification in the figure is also defined) and the m* needed to obtain the given magnification.

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