An improved photometric calibration of the sloan digital sky survey imaging data

被引：516

作者：

Padmanabhan, Nikhil ^{[1
,2
]}

Schlegel, David J. ^{[1
,3
]}

Finkbeiner, Douglas P. ^{[3
,4
]}

Barentine, J. C. ^{[5
,6
]}

Blanton, Michael R. ^{[7
]}

Brewington, Howard J. ^{[6
]}

Gunn, James E. ^{[3
]}

Harvanek, Michael ^{[6
]}

Hogg, David W. ^{[7
]}

Ivezic, Zeljko ^{[8
]}

Johnston, David ^{[3
,9
]}

Kent, Stephen M. ^{[10
]}

Kleinman, S. J. ^{[6
,11
]}

Knapp, Gillian R. ^{[3
]}

Krzesinski, Jurek ^{[6
,12
]}

Long, Dan ^{[6
]}

Neilsen, Eric H., Jr. ^{[6
,10
]}

Nitta, Atsuko ^{[6
,13
]}

Loomis, Craig ^{[3
,6
]}

Lupton, Robert H. ^{[3
]}

Roweis, Sam ^{[14
]}

Snedden, Stephanie A. ^{[6
]}

Strauss, Michael A. ^{[3
]}

Tucker, Douglas L. ^{[10
]}

机构：

[1] Lawrence Berkeley Natl Labs, Div Phys, Berkeley, CA 94720 USA

[2] Princeton Univ, Joseph Henry Labs, Princeton, NJ 08544 USA

[3] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA

[4] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[5] Univ Texas Austin, Dept Astron, Austin, TX 78712 USA

[6] Apache Point Observ, Sunspot, NM 88349 USA

[7] NYU, Dept Phys, New York, NY 10003 USA

[8] Univ Washington, Dept Astron, Seattle, WA 98195 USA

[9] Jet Prop Lab, Pasadena, CA 91109 USA

[10] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

[11] Subaru Telescope, Hilo, HI 96720 USA

[12] Cracow Pedag Univ, Mt Suhora Observ, PL-30084 Krakow, Poland

[13] Gemini Observ, Hilo, HI 96720 USA

[14] Univ Toronto, Dept Comp Sci, Toronto, ON M5S 3G4, Canada

来源：

ASTROPHYSICAL JOURNAL | 2008年 / 674卷 / 02期

关键词：

techniques; photometric;

D O I：

10.1086/524677

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present an algorithm to photometrically calibrate wide-field optical imaging surveys, which simultaneously solves for the calibration parameters and relative stellar fluxes using overlapping observations. The algorithm decouples the problem of "relative'' calibrations from that of "absolute'' calibrations; the absolute calibration is reduced to determining a few numbers for the entire survey. We pay special attention to the spatial structure of the calibration errors, allowing one to isolate particular error modes in downstream analyses. Applying this to the SDSS imaging data, we achieve similar to 1% relative calibration errors across 8500 deg(2) in griz; the errors are similar to 2% for the u band. These errors are dominated by unmodeled atmospheric variations at Apache Point Observatory. These calibrations, dubbed "uber-calibration,'' are now public with SDSS Data Release 6 and will be a part of subsequent SDSS data releases.

引用

页码：1217 / 1233

页数：17

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