IoW_20150226 - Gaia
Image of the Week
First Gaia BP/RP deblended spectra
|DSS coloured image of the double star HD270801. Bottom left: the observed BP spectrum in black and the two extracted spectra in magenta and blue; in red the extraction residuals. Bottom right: the same for RP|
To test the photometric deblending software, which is to be fully deployed at the Cambridge Data Processing Centre by the end of 2015, a set of known bright double stars has been processed. The figure above shows the output of the code applied to the BP/RP spectra of the double star HD270801, the first Gaia BP/RP deblended object. HD270801 is a ~10th magnitude known double star with a separation of 0.68 arcsec (~12 along-scan pixels), which means that the components are well separated in the AF field of view. In the photometers, however, the spectra overlap significantly.
credits: ESA/Gaia/DPAC/CU5/ASDC/INAF-OAR, Giuliano Giuffrida, Luigi Pulone, Marco Castellani
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