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This article is an erratum for:

Volume 537, January 2012
Article Number C2
Number of page(s) 1
Section Letters
Published online 09 January 2012

© ESO, 2012

Due to an error in the application of the heliocentric corrections to the NOT radial velocities, the interstellar velocities quoted in the paper (and in Table 2) for the optical lines require corrections of –19.6 km s-1 for the dates covered in the text. Catchpole (1969). Also gives radial velocities for the two components on Ca II K, +19.2 and +20.6 km s-1 based on photographic spectra taken at 49 Å mm-1 during the 1966 outburst. The corrected Table 2 is included here. We thank Ivan De Gennaro Aquino, Univ. di Pisa, whose diligent work uncovered this problem.

Table 2

Heliocentric interstellar line velocities.


  1. Catchpole, R. M. 1969, MNRAS, 142, 119 [NASA ADS] [CrossRef] [Google Scholar]

All Tables

Table 2

Heliocentric interstellar line velocities.

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