2018AJ....155...41B

Query : 2018AJ....155...41B

2018AJ....155...41B - Astron. J., 155, 41-41 (2018/January-0)

Forward Global photometric calibration of the Dark Energy Survey.

BURKE D.L., RYKOFF E.S., ALLAM S., ANNIS J., BECHTOL K., BERNSTEIN G.M., DRLICA-WAGNER A., FINLEY D.A., GRUENDL R.A., JAMES D.J., KENT S., KESSLER R., KUHLMANN S., LASKER J., LI T.S., SCOLNIC D., SMITH J., TUCKER D.L., WESTER W., YANNY B., ABBOTT T.M.C., ABDALLA F.B., BENOIT-LEVY A., BERTIN E., CARNERO ROSELL A., CARRASCO KIND M., CARRETERO J., CUNHA C.E., D'ANDREA C.B., DA COSTA L.N., DESAI S., DIEHL H.T., DOEL P., ESTRADA J., GARCIA-BELLIDO J., GRUEN D., GUTIERREZ G., HONSCHEID K., KUEHN K., KUROPATKIN N., MAIA M.A.G., MARCH M., MARSHALL J.L., MELCHIOR P., MENANTEAU F., MIQUEL R., PLAZAS A.A., SAKO M., SANCHEZ E., SCARPINE V., SCHINDLER R., SEVILLA-NOARBE I., SMITH M., SMITH R.C., SOARES-SANTOS M., SOBREIRA F., SUCHYTA E., TARLE G., WALKER A.R. (The DES Collaboration)

Abstract (from CDS):

Many scientific goals for the Dark Energy Survey (DES) require the calibration of optical/NIR broadband b = grizY photometry that is stable in time and uniform over the celestial sky to one percent or better. It is also necessary to limit to similar accuracy systematic uncertainty in the calibrated broadband magnitudes due to uncertainty in the spectrum of the source. Here we present a "Forward Global Calibration Method (FGCM)" for photometric calibration of the DES, and we present results of its application to the first three years of the survey (Y3A1). The FGCM combines data taken with auxiliary instrumentation at the observatory with data from the broadband survey imaging itself and models of the instrument and atmosphere to estimate the spatial and time dependences of the passbands of individual DES survey exposures. "Standard" passbands that are typical of the passbands encountered during the survey are chosen. The passband of any individual observation is combined with an estimate of the source spectral shape to yield a magnitude mbstd in the standard system. This "chromatic correction" to the standard system is necessary to achieve subpercent calibrations and in particular, to resolve ambiguity between the broadband brightness of a source and the shape of its SED. The FGCM achieves a reproducible and stable photometric calibration of standard magnitudes mbstd of stellar sources over the multiyear Y3A1 data sample with residual random calibration errors of σ =6–7 mmag per exposure. The accuracy of the calibration is uniform across the 5000 °2 DES footprint to within σ =7 mmag. The systematic uncertainties of magnitudes in the standard system due to the spectra of sources are less than 5 mmag for main-sequence stars with 0.5 g-i 3.0.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): methods: observational - techniques: photometric - techniques: photometric

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 BD+17 4708 SB* 22 11 31.3756832854 +18 05 34.177983548 9.73 9.91 9.46 9.03 8.70 sdF8 580 0

Query : 2018AJ....155...41B

Basic data :
BD+17 4708 -- Spectroscopic Binary
Other object types: otypes_help 		* (2022AJ,BD,...), PM* (2016ApJ,Ci,...), SB* (2004A&A,SBC9), Pe* (2020AJ), NIR (2MASS), MIR (WISEA)
ICRS coord. (ep=J2000) : 		22 11 31.3756832854 +18 05 34.177983548 (Optical) [ 0.1483 0.1377 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		22 09 05.8091022068 +17 50 41.673202547 [ 0.1483 0.1377 90 ]
Gal coord. (ep=J2000) : 		077.8282404751583 -30.4411124090945 [ 0.1483 0.1377 90 ]
Proper motions mas/yr : 		505.945 59.270 [0.210 0.177 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) -292.351990 [0.139392] / z(spectroscopic) -0.000975 [0.000000] / cz -292.21 [0.14]
   (NIR) A 2020AJ....160..120J
Parallaxes (mas): 		7.6143 [0.1606] A 2020yCat.1350....0G
Spectral type: 		sdF8 D 2000A&A...353..978M
Fluxes (9) :
U 9.73 [~] C 2002yCat.2237....0D
B 9.91 [~] C 2002yCat.2237....0D
V 9.46 [~] C 2002yCat.2237....0D
R 9.03 [~] C 2002yCat.2237....0D
G 9.329703 [0.002769] C 2020yCat.1350....0G
I 8.70 [~] C 2002yCat.2237....0D
J 8.435 [0.056] C 2003yCat.2246....0C
H 8.108 [0.046] C 2003yCat.2246....0C
K 8.075 [0.038] C 2003yCat.2246....0C
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Hierarchy : number of linked objects
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: 1 : 186 Display criteria :

Identifiers (35) :
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BD+17 4708 HIC 109558 PLX 5368.00 UCAC2 38361140
AG+17 2475 HIP 109558 PM 22091+1751 USNO-B1.0 1080-00694096
AP J22113136+1805341 LFT 1692 PPM 141166 uvby98 001704708
ASCC 907556 LHS 3770 Ross 270 WISEA J221131.75+180534.7
Ci 20 1343 LSPM J2211+1805 SBC9 2186 [SMM2006] SPG 329
GCRV 72895 LTT 16493 TIC 258822592 Gaia DR2 1776289248313154688
GEN# +0.01704708 2MASS J22113136+1805341 TYC 1685-1702-1 Gaia DR3 1776289248313154688
G 126-62 NLTT 53160 UBV 18973 Gaia DR1 1776289244018448000
G 127-7 PLX 5368 UBV M 862

References (580 between 1850 and 2026) (Total 580)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Velocities : 10    Distance : 2    Rot : 6    Fe/H : 51    Plx : 6    PM : 11    SpT : 3   

   

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BD+17 4708 AG+17 2475 AP J22113136+1805341 G 126-62 G 127-7
HIC 109558 HIP 109558 LHS 3770 LSPM J2211+1805 2MASS J22113136+1805341
NLTT 53160 PLX 5368 PPM 141166 TYC 1685-1702-1 UCAC2 38361140
USNO-B1.0 1080-00694096 uvby98 001704708 WISEA J221131.75+180534.7 Gaia DR2 1776289248313154688 Gaia DR3 1776289248313154688
Gaia DR1 1776289244018448000

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