Calibration of the MACHO photometry database
C. Alcock, R. A. Allsman, D. R. Alves, T. S. Axelrod, A. C. Becker, D. P. Bennett, K. H. Cook, A. J. Drake, K. C. Freeman, M. Geha, K. Griest, M. J. Lehner, S. L. Marshall, D. Minniti, B. A. Peterson, P. Popowski, M. R. Pratt, C. A. Nelson, P. J. Quinn, C. W. Stubbs
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W. Sutherland, A. B. Tomaney, T. Vandehei, D. L. Welch
Facultad Ciencias Exactas
The MACHO Project is a microlensing survey that monitors the brightnesses of ∼60 million stars in the Large Magellanic Cloud (LMC), Small Magellanic Cloud, and Galactic bulge. Our database presently contains about 80 billion photometric measurements, a significant fraction of all astronomical photometry. We describe the calibration of MACHO two-color photometry and transformation to the standard Kron-Cousins V and R system. Calibrated MACHO photometry may be properly compared with all other observations on the Kron-Cousins standard system, enhancing the astrophysical value of these data. For ∼9 million stars in the LMC bar, independent photometric measurements of ∼20,000 stars with V ≲ 18 mag in field-overlap regions demonstrate an internal precision σV = 0.021, σR = 0.019, σV-R = 0.028 mag. The accuracy of the zero point in this calibration is estimated to be ±0.035 mag for stars with colors in the range -0.1 mag < V - R < 1.2 mag. A comparison of calibrated MACHO photometry with published photometric sequences and new Hubble Space Telescope observations shows agreement. The current calibration zero-point uncertainty for the remainder of the MACHO photometry database is estimated to be ±0.10 mag in V or R and ±0.04 mag in V - R. We describe the first application of calibrated MACHO data: the construction of a color-magnitude diagram used to calculate our experimental sensitivity for detecting microlensing in the LMC.
Publications of the Astronomical Society of the Pacific
Publicada - dic 1999
Astronomía y astrofísica
Ciencias planetarias y espacial
Profundice en los temas de investigación de 'Calibration of the MACHO photometry database'. En conjunto forman una huella única.
massive compact halo objects Física y astronomía 100%
photometry Física y astronomía 64%
Magellanic clouds Física y astronomía 52%
calibration Ciencias ambientales y de la tierra 44%
stars Física y astronomía 30%
astronomical photometry Física y astronomía 21%
diagram Ciencias ambientales y de la tierra 17%
color Física y astronomía 15%
Alcock, C., Allsman, R. A., Alves, D. R., Axelrod, T. S., Becker, A. C., Bennett, D. P., Cook, K. H., Drake, A. J., Freeman, K. C., Geha, M., Griest, K., Lehner, M. J., Marshall, S. L., Minniti, D., Peterson, B. A., Popowski, P., Pratt, M. R., Nelson, C. A., Quinn, P. J., ... Welch, D. L. (1999). Calibration of the MACHO photometry database. Publications of the Astronomical Society of the Pacific, 111(766), 1539-1558. https://doi.org/10.1086/316469
Alcock, C. ; Allsman, R. A. ; Alves, D. R. ; Axelrod, T. S. ; Becker, A. C. ; Bennett, D. P. ; Cook, K. H. ; Drake, A. J. ; Freeman, K. C. ; Geha, M. ; Griest, K. ; Lehner, M. J. ; Marshall, S. L. ; Minniti, D. ; Peterson, B. A. ; Popowski, P. ; Pratt, M. R. ; Nelson, C. A. ; Quinn, P. J. ; Stubbs, C. W. ; Sutherland, W. ; Tomaney, A. B. ; Vandehei, T. ; Welch, D. L. / Calibration of the MACHO photometry database. En: Publications of the Astronomical Society of the Pacific. 1999 ; Vol. 111, N.º 766. pp. 1539-1558.
@article{c8fa77a0bd7444bcadaf5f10ca7378fd,
title = "Calibration of the MACHO photometry database",
abstract = "The MACHO Project is a microlensing survey that monitors the brightnesses of ∼60 million stars in the Large Magellanic Cloud (LMC), Small Magellanic Cloud, and Galactic bulge. Our database presently contains about 80 billion photometric measurements, a significant fraction of all astronomical photometry. We describe the calibration of MACHO two-color photometry and transformation to the standard Kron-Cousins V and R system. Calibrated MACHO photometry may be properly compared with all other observations on the Kron-Cousins standard system, enhancing the astrophysical value of these data. For ∼9 million stars in the LMC bar, independent photometric measurements of ∼20,000 stars with V ≲ 18 mag in field-overlap regions demonstrate an internal precision σV = 0.021, σR = 0.019, σV-R = 0.028 mag. The accuracy of the zero point in this calibration is estimated to be ±0.035 mag for stars with colors in the range -0.1 mag < V - R < 1.2 mag. A comparison of calibrated MACHO photometry with published photometric sequences and new Hubble Space Telescope observations shows agreement. The current calibration zero-point uncertainty for the remainder of the MACHO photometry database is estimated to be ±0.10 mag in V or R and ±0.04 mag in V - R. We describe the first application of calibrated MACHO data: the construction of a color-magnitude diagram used to calculate our experimental sensitivity for detecting microlensing in the LMC.",
author = "C. Alcock and Allsman, {R. A.} and Alves, {D. R.} and Axelrod, {T. S.} and Becker, {A. C.} and Bennett, {D. P.} and Cook, {K. H.} and Drake, {A. J.} and Freeman, {K. C.} and M. Geha and K. Griest and Lehner, {M. J.} and Marshall, {S. L.} and D. Minniti and Peterson, {B. A.} and P. Popowski and Pratt, {M. R.} and Nelson, {C. A.} and Quinn, {P. J.} and Stubbs, {C. W.} and W. Sutherland and Tomaney, {A. B.} and T. Vandehei and Welch, {D. L.}",
doi = "10.1086/316469",
journal = "Publications of the Astronomical Society of the Pacific",
publisher = "University of Chicago",
number = "766",
Alcock, C, Allsman, RA, Alves, DR, Axelrod, TS, Becker, AC, Bennett, DP, Cook, KH, Drake, AJ, Freeman, KC, Geha, M, Griest, K, Lehner, MJ, Marshall, SL, Minniti, D, Peterson, BA, Popowski, P, Pratt, MR, Nelson, CA, Quinn, PJ, Stubbs, CW, Sutherland, W, Tomaney, AB, Vandehei, T & Welch, DL 1999, 'Calibration of the MACHO photometry database', Publications of the Astronomical Society of the Pacific, vol. 111, n.º 766, pp. 1539-1558. https://doi.org/10.1086/316469
Calibration of the MACHO photometry database. / Alcock, C.; Allsman, R. A.; Alves, D. R.; Axelrod, T. S.; Becker, A. C.; Bennett, D. P.; Cook, K. H.; Drake, A. J.; Freeman, K. C.; Geha, M.; Griest, K.; Lehner, M. J.; Marshall, S. L.; Minniti, D.; Peterson, B. A.; Popowski, P.; Pratt, M. R.; Nelson, C. A.; Quinn, P. J.; Stubbs, C. W.; Sutherland, W.; Tomaney, A. B.; Vandehei, T.; Welch, D. L.
En: Publications of the Astronomical Society of the Pacific, Vol. 111, N.º 766, 12.1999, p. 1539-1558.
T1 - Calibration of the MACHO photometry database
AU - Alcock, C.
AU - Allsman, R. A.
AU - Alves, D. R.
AU - Axelrod, T. S.
AU - Becker, A. C.
AU - Bennett, D. P.
AU - Cook, K. H.
AU - Drake, A. J.
AU - Freeman, K. C.
AU - Geha, M.
AU - Griest, K.
AU - Lehner, M. J.
AU - Marshall, S. L.
AU - Minniti, D.
AU - Peterson, B. A.
AU - Popowski, P.
AU - Pratt, M. R.
AU - Nelson, C. A.
AU - Quinn, P. J.
AU - Stubbs, C. W.
AU - Sutherland, W.
AU - Tomaney, A. B.
AU - Vandehei, T.
AU - Welch, D. L.
N2 - The MACHO Project is a microlensing survey that monitors the brightnesses of ∼60 million stars in the Large Magellanic Cloud (LMC), Small Magellanic Cloud, and Galactic bulge. Our database presently contains about 80 billion photometric measurements, a significant fraction of all astronomical photometry. We describe the calibration of MACHO two-color photometry and transformation to the standard Kron-Cousins V and R system. Calibrated MACHO photometry may be properly compared with all other observations on the Kron-Cousins standard system, enhancing the astrophysical value of these data. For ∼9 million stars in the LMC bar, independent photometric measurements of ∼20,000 stars with V ≲ 18 mag in field-overlap regions demonstrate an internal precision σV = 0.021, σR = 0.019, σV-R = 0.028 mag. The accuracy of the zero point in this calibration is estimated to be ±0.035 mag for stars with colors in the range -0.1 mag < V - R < 1.2 mag. A comparison of calibrated MACHO photometry with published photometric sequences and new Hubble Space Telescope observations shows agreement. The current calibration zero-point uncertainty for the remainder of the MACHO photometry database is estimated to be ±0.10 mag in V or R and ±0.04 mag in V - R. We describe the first application of calibrated MACHO data: the construction of a color-magnitude diagram used to calculate our experimental sensitivity for detecting microlensing in the LMC.
AB - The MACHO Project is a microlensing survey that monitors the brightnesses of ∼60 million stars in the Large Magellanic Cloud (LMC), Small Magellanic Cloud, and Galactic bulge. Our database presently contains about 80 billion photometric measurements, a significant fraction of all astronomical photometry. We describe the calibration of MACHO two-color photometry and transformation to the standard Kron-Cousins V and R system. Calibrated MACHO photometry may be properly compared with all other observations on the Kron-Cousins standard system, enhancing the astrophysical value of these data. For ∼9 million stars in the LMC bar, independent photometric measurements of ∼20,000 stars with V ≲ 18 mag in field-overlap regions demonstrate an internal precision σV = 0.021, σR = 0.019, σV-R = 0.028 mag. The accuracy of the zero point in this calibration is estimated to be ±0.035 mag for stars with colors in the range -0.1 mag < V - R < 1.2 mag. A comparison of calibrated MACHO photometry with published photometric sequences and new Hubble Space Telescope observations shows agreement. The current calibration zero-point uncertainty for the remainder of the MACHO photometry database is estimated to be ±0.10 mag in V or R and ±0.04 mag in V - R. We describe the first application of calibrated MACHO data: the construction of a color-magnitude diagram used to calculate our experimental sensitivity for detecting microlensing in the LMC.
U2 - 10.1086/316469
DO - 10.1086/316469
JO - Publications of the Astronomical Society of the Pacific
JF - Publications of the Astronomical Society of the Pacific
IS - 766
Alcock C, Allsman RA, Alves DR, Axelrod TS, Becker AC, Bennett DP y otros. Calibration of the MACHO photometry database. Publications of the Astronomical Society of the Pacific. 1999 dic;111(766):1539-1558. https://doi.org/10.1086/316469