Fig. 7 from The Two Micron All Sky Survey (2MASS)

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The Two Micron All Sky Survey (2MASS)

Authors: M. F. Skrutskie, R. M. Cutri, R. Stiening, M. D. Weinberg, S. Schneider, J. M. Carpenter, C. Beichman, R. Capps, T. Chester, J. Elias, J. Huchra, J. Liebert, C. Lonsdale, D. G. Monet, S. Price, P. Seitzer, T. Jarrett, J. D. Kirkpatrick, J. E. Gizis, E. Howard, T. Evans, J. Fowler, L. Fullmer, R. Hurt, R. Light, E. L. Kopan, K. A. Marsh, H. L. McCallon, R. Tam, S. Van Dyk, and S. Wheelock

Skrutskie et al. 2006 The Astronomical Journal 131 1163.

Provider: AAS Journals

Caption: Fig. 7.

Mean nightly J (blue), H (green), and K_s (red) photometric zero points vs. time for the two 2MASS observatories. The zero point is measured in magnitudes and represents the offset between instrumental and calibrator magnitudes. The zero point thus tracks the total system transmission, with more negative values indicating poorer sensitivity.

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