Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

Testing Accuracy and Precision of Existing Photometry Algorithms on Moving Targets

S. Sonnett, K. Meech, R. Jedicke, S. Bus, J. Tonry and O. Hainaut
Publications of the Astronomical Society of the Pacific
Vol. 125, No. 926 (April 2013), pp. 456-469
DOI: 10.1086/670593
Stable URL: http://www.jstor.org/stable/10.1086/670593
Page Count: 14
  • Download PDF
  • Cite this Item
Testing Accuracy and Precision of Existing Photometry Algorithms on Moving Targets
We're having trouble loading this content. Download PDF instead.

Abstract

ABSTRACT.Previous studies determining which astronomical photometry software is best suited for a particular dataset are usually focused on speed, source classification, and/or meeting a sensitivity requirement. For faint objects in particular, the priority is given to maximizing signal-to-noise ratio. Photometry of moving targets offers additional challenges (1) to aperture photometry because background object contamination varies from image to image, and (2) to routines that build a PSF model from point sources in the image because trailed field stars do not perfectly represent the PSF of the untrailed target. Here, we present the results of testing several photometry algorithms (tphot, DAOPHOT, DoPHOT, APT, and multiple techniques within Source Extractor and IRAF’s PHOT) on data for a faint, slow-moving solar system object with a known light curve. We find that the newly-developed tphot software most accurately and precisely reproduces the object’s true light curve, with particular advantages in centroiding, exclusion of contaminants from the target’s flux, and fitting flux in the wings of the point-spread function.

Notes and References

This item contains 25 references.

REFERENCES
  • ['Alard, C. 2000, in ASP Conf. Ser. 203, The Impact of Large-Scale Surveys on Pulsating Star Research, ed. L. Szabados, & D. Kurtz (San Francisco: ASP), 50–55']
  • ['Becker, A. C., Silvestri, N. M., Owen, R. E., Ivezić, Ž., & Lupton, R. H. 2007, PASP, 119, 1462']
  • ['Bertin, E., & Arnouts, S. 1996, A&AS, 117, 393']
  • ['Davis, L. 1994, A Reference Guide to the IRAF/DAOPHOT Package, http://iraf.net/irafdocs/daorefman/']
  • ['Ferrarese, L., Silbermann, N. A., Mould, J. R., Stetson, P. B., Saha, A., Freedman, W. L., & Kennicutt, R. C. Jr. 2000, PASP, 112, 177']
  • ['Friel, E. D., & Geisler, D. 1991, AJ, 101, 1338']
  • ['Handler, G. 2003, Baltic Astron., 12, 243']
  • ['Holwerda, B. W. 2005, preprint (arXiv:astro-ph/0512139)']
  • ['Howell, S. B. 1989, PASP, 101, 616']
  • ['Irwin, J., Aigrain, S., Hodgkin, S., Irwin, M., Bouvier, J., Clarke, C., Hebb, L., & Moraux, E. 2006, MNRAS, 370, 954']
  • ['Ivezić, Ž., Lupton, R. H., Schlegel, D., Boroski, B., Adelman-McCarthy, J., Yanny, B., Kent, S., Stoughton, C., et al. 2004, Astron. Nachr., 325, 583']
  • ['Kjeldsen, H., & Frandsen, S. 1992, PASP, 104, 413']
  • ['Kron, R. G. 1980, ApJS, 43, 305']
  • ['Laher, R. R., Gorjian, V., Rebull, L. M., Masci, F. J., Fowler, J. W., Helou, G., Kulkarni, S. R., & Law, N. M. 2012a, PASP, 124, 737']
  • ['Laher, R. R., Rebull, L. M., Gorjian, V., Masci, F. J., Fowler, J. W., Grillmair, C., Surace, J., Mattingly, S., et al. 2012b, PASP, 124, 764']
  • ['Lee, C.-U., Koo, J.-R., Kim, S.-L., Lee, J. W., Park, B.-G., & Han, C. 2010, J. Astron. Space Sci., 27, 289']
  • ['Lupton, R. H., Ivezic, Z., Gunn, J. E., Knapp, G., Strauss, M. A., & Yasuda, N. 2002, Proc. SPIE, 4836, 350']
  • ['Mateo, M., & Schechter, P. L. 1989, ESO Conference and Workshop Proceedings, 31, 69–83']
  • ['Schechter, P. L., Mateo, M., & Saha, A. 1993, PASP, 105, 1342']
  • ['Stetson, P. B. 1992, in ASP Conf. Ser. 25, Astronomical Data Analysis Software and Systems I, ed. D. M. Worrall, C. Biemesderfer, & J. Barnes (San Francisco: ASP), 297']
  • ['Tanvir, N. R., Robinson, D. R. T., & von Hippel, T. 1995, WFPC2 Aperture Photometry and PSF Modelling, preprint (arXiv:astro-ph/9503083)']
  • ['Tody, D. 1986, Proc. SPIE, 627, 733']
  • ['Tonry, J. L. 2011, PASP, 123, 58']
  • ['Vereš, P., Jedicke, R., Denneau, L., Wainscoat, R., Holman, M. J., & Lin, H.-W. 2012, PASP, 124, 1197']
  • ['Wozniak, P. R. 2000, Acta Astron., 50, 421']