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The Stability of BVRI Comparison Stars Near Selected TeV Blazars | | Cameron J. Pace
; Richard L. Pearson III
; J. Ward Moody
; Michael D. Joner
; Bret Little
; | | Date: |
6 Mar 2013 | | Abstract: | We have measured Johnson BV and Cousins RI magnitudes for comparison stars
near five TeV blazars. We compare our values with published values, spanning 25
years in some cases, to identify those stars that are most likely proven
stable. To avoid zero-point offsets mimicking long-term variability, we based
our analysis on the standard deviation between measurements after a mean offset
between data sets was removed. We found most stars to be stable at the 0.04
magnitude level. We confirm two stars as variable and identify two others as
possibly being variable. In each of the five fields there are at least two
stars, and typically many more, that show no evidence of variability. | | Source: | arXiv, 1303.1380 | | Services: | Forum | Review | PDF | Favorites | |
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