Hypercalibration:基于Pan-STARRS1的斯隆数字巡天重新校准
天体物理仪器与方法
2016-05-25 v1
摘要
我们提出了利用源自Pan-STARRS1(PS1)的新平场和零点对斯隆数字巡天(SDSS)测光进行重新校准的结果。使用6000万颗恒星的PSF测光(其 ),我们推导了一个放大器增益和平场校正模型,各次运行的RMS残差在 波段为3毫星等(mmag),在 波段为15 mmag。新的测光零点经过调整,使银北天区的中位数保持不变,以便与先前的SDSS工作兼容。我们还基于SDSS波段中同时发生的测光偏差,识别出SDSS中的瞬态非测光周期(“contrails”)。当在 区域上平均时,SDSS和PS1重新校准的恒星PSF测光在 中的RMS差异分别为{9,7,7,8} mmag。
引用
@article{arxiv.1512.01214,
title = {Hypercalibration: A Pan-STARRS1-based recalibration of the Sloan Digital Sky Survey},
author = {Douglas P. Finkbeiner and Edward F. Schlafly and David J. Schlegel and Nikhil Padmanabhan and Mario Juric and William S. Burgett and Kenneth C. Chambers and Larry Denneau and Peter W. Draper and Heather Flewelling and Klaus W. Hodapp and Nick Kaiser and E. A. Magnier and N. Metcalfe and Jeffrey S. Morgan and Paul A. Price and Christopher W. Stubbs and John L. Tonry},
journal= {arXiv preprint arXiv:1512.01214},
year = {2016}
}
备注
13 pages, 7 figures, ApJ, in press. "Hypercalibration" refers to using repeat measurements of many stars from multiple surveys to constrain calibration parameters