Absolute Calibration of the Infrared Array Camera on the Spitzer Space Telescope
作者： S. T. Megeath , P. Barmby , William T. Reach , William Glaccum , Jason Surace
DOI: 10.1086/432670
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摘要: ABSTRACT The Infrared Array Camera (IRAC) on the Spitzer Space Telescope is absolutely calibrated by comparing photometry of a set A stars near north ecliptic pole to predictions based ground‐based observations and stellar atmosphere model. brightness point sources an accuracy 3%, relative models for A‐star atmospheres, performed analyzed in same manner as calibration stars. This includes corrections location star array centroid within peak pixel. Long‐term stability IRAC was measured monitoring dwarfs K giants (near pole) observed several times per month; stable 1.5% (rms) over year. Intermediate‐timescale at least one secondary calibrator plane) every 12 hr while nominal operations; intermediat...
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