getannotation({"annotations":[{"id":3214,"username":"epecontal","context":"vizierTable","element":"I/297","creationDate":1401192785000,"parentId":-1,"isAdmin":"false","isPrivate":"false","text":"I have met a problem using the NOMAD catalog: The B magnitudes from the YB6 catalog appear to be wrong by at least 4 magnitudes in some fields. For instance, in the field centered at:\r\nra2000\u003d18:19:02.71  de2000\u003d-32:12:57.9\r\nradius 7.5 arcmin\r\n\r\nThe stars with magnitude from YB6 have a magnitude around 12. If you draw an histogram of all the magnitudes in this field, there is a separated class at magnitude 12 corresponding to these stars. I don't know where this artefact comes from, but it is there...\r\n","parsedText":"I have met a problem using the NOMAD catalog: The B magnitudes from the YB6 catalog appear to be wrong by at least 4 magnitudes in some fields. For instance, in the field centered at:\u003cbr /\u003era2000\u003d18:19:02.71  de2000\u003d-32:12:57.9\u003cbr /\u003eradius 7.5 arcmin\u003cbr /\u003e\u003cbr /\u003eThe stars with magnitude from YB6 have a magnitude around 12. If you draw an histogram of all the magnitudes in this field, there is a separated class at magnitude 12 corresponding to these stars. I don't know where this artefact comes from, but it is there...\u003cbr /\u003e","adminText":"Effectively the problem seems to be with the Bmagnitude (but not with the V or R magnitude) with a large number of blue magnitudes between 12.4 and 12.6 ; since the YB6 (Yellow-Blue catalog) was not published, difficult to guess the origin of the problem (both Bmag and Vmag are from YB6)...","type":"errorNotification","status":"pending"}],"requestedCatalogue":"I/297"})