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Systematic Bias in 2MASS Galaxy Photometry · Around

2011

Systematic Bias in 2MASS Galaxy Photometry

Schombert, James

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We report the discovery of a serious bias in galaxy photometry reported in the 2MASS Extended Source Catalog (Jarrett et al.

2000).
Due to an undetermined flaw in the 2MASS surface photometry routines, isophotal and total magnitudes calculated by their methods underestimate the luminosity of galaxies from 10% to 40%.
This is found to be due to incorrectly determined scalelengths and isophotal radii, which are used to define the aperture sizes for Kron and total fluxes.

Built on

Schombert, J. M. 1986, ApJS, 60, 603
1986
Earlier work this paper cites.
Jarrett, T. H., Chester, T., Cutri, R., Schneider, S., Skrutskie, M., & Huchra, J. P. 2000, AJ, 119, 2498
2000
Earlier work this paper cites.

Similar

Jarrett, T. H., Chester, T., Cutri, R., Schneider, S. E., & Huchra, J. P. 2003, AJ, 125, 525
2003
Cited alongside, same era.
Schombert, J. 2007, arXiv:astro-ph/0703646
2007
Cited alongside, same era.

Then

Schombert, J. & Smith, A. K. 2011, in prep
Original
2011
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