Open AccessThe extension of the Hubble diagram. I. New redshifts and BVR photometry of remote cluster galaxies, and an improved richness correction.
Author(s) -
Allan Sandage,
J. Kristian,
James A. Westphal
Publication year - 1976
Publication title -
astrophysical journal/the astrophysical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.376
H-Index - 489
eISSN - 1538-4357
pISSN - 0004-637X
DOI - 10.1086/154324
Subject(s) - physics , astrophysics , redshift , galaxy , photometry (optics) , astronomy , galaxy cluster , virgo cluster , stars