1999PASP..111.1539A


Query : 1999PASP..111.1539A

1999PASP..111.1539A - Publ. Astron. Soc. Pac., 111, 1539-1558 (1999/December-0)

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. (The MACHO Collaboration)

Abstract (from CDS):

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.

Abstract Copyright:

Journal keyword(s): Methods: Data Analysis - Surveys - Techniques: Photometric

Simbad objects: 18

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Number of rows : 18
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9907 1
2 NGC 330 Cl* 00 56 20.59 -72 27 12.5 9.37 9.76 9.55   8.89 ~ 377 0
3 OGLE J050458.40-692333.6 RR* 05 04 58.3177953984 -69 23 33.479629105   19.91 19.192   18.65 ~ 9 0
4 OGLE LMC-SC12 34951 RR* 05 05 05.7974657675 -69 25 00.734300874   19.69 19.213   18.76 ~ 10 0
5 OGLE LMC-SC12 39205 RR* 05 05 10.4936817161 -69 23 44.720508996   19.69 19.30   18.73 ~ 7 0
6 HD 269075 cC* 05 06 47.9723051964 -70 02 13.297259550   13.30 12.944 12.77 11.861 M 65 0
7 V* SZ Dor RR* 05 06 50.3638102376 -68 49 36.992857965     15.178   14.635 ~ 10 0
8 NGC 1847 Cl* 05 07 08.200 -68 58 15.49   12.508 12.469     ~ 88 0
9 SV* HV 2352 cC* 05 09 04.3685065053 -70 21 54.126571648   14.86 14.197 13.74 13.38 ~ 37 0
10 SV* HV 905 cC* 05 09 15.9286526386 -68 44 29.530991558   15.06 14.520 13.99 13.592 ~ 29 0
11 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15534 1
12 SV* HV 2510 cC* 05 25 25.8415578439 -68 23 51.129502414     14.899   14.085 ~ 11 0
13 NGC 2058 Cl* 05 36 58.560 -70 09 44.75   12.09 11.85     ~ 42 0
14 NGC 2065 Cl* 05 37 38.030 -70 14 10.64   11.50 11.24     ~ 47 0
15 OGLE LMC-SC20 113500 EB* 05 46 46.54 -71 08 53.9     19.163   18.886 ~ 245 0
16 NAME Baade Window reg 18 03.5 -30 01           ~ 563 3
17 Cl* NGC 1835 GR 26 RR* ~ ~   19.49 19.18     ~ 2 0
18 NAME Galactic Bulge reg ~ ~           ~ 3656 0

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2021.09.21-06:29:07

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