SIMBAD references

2005PASP..117..563S - Publ. Astron. Soc. Pac., 117, 563-588 (2005/June-0)

Homogeneous photometry. IV. On the standard sequence in the globular cluster NGC 2419.


Abstract (from CDS):

I present a new analysis of CCD-based BVRI broadband photometry for the globular cluster NGC 2419, based on 340 CCD images either donated by colleagues or retrieved from public archives. The calibrated results have been made available through my Web site. I compare the results of my analysis with those of an independent analysis of a subset of these data by Saha et al. ((ref???)2005, PASP, 117, 37), who have found a color-dependent discrepancy of up to 0.05 mag between their I-band photometry and mine for stars in this cluster. I conclude that a major part of the discrepancy appears to be associated with small shutter timing errors (a few hundredths of a second) in the Mini-Mosaic (MIMO) camera on the WIYN 3.5 m telescope. Smaller contributions to the anomaly likely come from (1) a color-scale error with a maximum amplitude of ~±0.02 mag in my secondary standard list as of 2004 September, and (2) statistical effects arising from the previous study's use of a relatively small number of standard-star observations to determine a comparatively large number of fitting parameters in the photometric transformations.

Abstract Copyright:

Journal keyword(s): Techniques: Photometric - Catalogs - Galaxy: Globular Clusters: Individual: NGC Number: NGC 2419

CDS comments: In the ref list 2005AJ.129.2692W insead of 2004. In parag. 5.3.2. landolt star 98 102 is a probable misprint for SA 98-1002. In parag. 5.3.3. secondary standards L110-S96 and L110-S44 are not identified.

Simbad objects: 42

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