ONLINE REVISIONS. RBC V4
In this file we report on minor revisions of the current version of RBC that are
made as we recognize errors or if new data become available.

- RBC 2.0 [May 10, 2006] 
Wrong cross-identifications. 
The identifications NB6 and NB80 we took from Battistini et al. (1993) were 
found to be wrong. NB6 corresponds in fact to B118 and NB80 to B064D; we noted 
also that NB6 and NB78 are B064D and B118, respectively.
Moreover, in RBC (V.1) the object AU11 is actually B090D and AU12 is B145.
The RBC V2.0 has been corrected accordingly.
New data are included: Galleti et al. (2005) 

- RBC 3.0 [May 18, 2007]
Wrong cross-identifications. 
B458 and B031D are the same object.
The RBC V3.0 has been corrected accordingly.
New data are included: Martin et al.(2006); Mackey et al. (2007); 
Galleti et al. (2007) 

- RBC 3.2 [July 16, 2007] 
Wrong cross-identifications. 
VDB0 and B195D are the same object.
The RBC V3.2 has been corrected accordingly.
New data are included: Kim et al. (2007)

- RBC 3.3 [November 26, 2007] 
Wrong classifications.
B518 supplementary investigations shows that is star superimposed to galaxy,
and B519 is a galaxy (its radial velocity is from another object). 
NB67 is a star from HST images.

- RBC 3.4 [January 29, 2008] 
New data are included: Huxor et al. (2008)

- RBC 3.5 [March 21, 2008] 
New data are included:  Extended clusters reported in
Mackey et al. (2006) and Huxor et al. (2008)

- RBC 4.0 [December, 2009] 
Revised coordinates. the newly adopted values have been taken from:
2MASS, GSC-II, Caldwell et al. (2009)(WARNING!!!! Read our notes concerning 
this catalog in RBC_Caldwell file) and Massey et al. (2006), with this priority. 
We identified (and corrected the catalogue accordingly) several objects having 
two different entries (names) in previous versions:
B450 is SK087C; B465 is SK117B; B039D is SK103C; B108D is SK150B; 
B206D is SK084B; B118D is M049; B196D is SH08; B271D is SH18; M072 is SK167C; 
M071 is SK166C; M076 is SK170C; B521 is SK034A; B522 is SK038A; B523 is SK112B;
DAO32 is SK045B.
The classification of B444 was wrong and now has been corrected.
New data, new objects and updated classifications are included, from: 
Beccari et al. (2007), Fan et al. (2008), Alves-Brito et al. (2009), 
Caldwell et al. (2009) (Please read the notes), Galleti et al. (2009), 
Perina et al. (2009a) and Perina et al. (2009b). 
We also included new classifications and/or radial velocity estimates from
unpublished data obtained by us (TNG and Loiano telescopes):
B347D, B349D and B271D are galaxies;  B516 and SK101C are stars; 
SK003B Galaxy?, B344D star? Vr=+21 +- 15; B468 Vr=+21 +- 15; 
B399  Vr=-437 +- 20; B457 Vr=-63 +- 15; MCGC8 Vr=-381 +- 15;
MCGC8 Vr=-147 +- 20