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The AKARI far-infrared all-sky survey maps

Nakagawa, Takao; Doi, Yasuo; Takita, Satoshi +15 more

We present a far-infrared all-sky atlas from a sensitive all-sky survey using the Japanese AKARI satellite. The survey covers > 99% of the sky in four photometric bands centred at 65 µm, 90 µm, 140 µm, and 160 µm, with spatial resolutions ranging from 1' to 1{^''_.}5. These data provide crucial information on t…

Calibration of the AKARI far-infrared all-sky survey maps

Nakagawa, Takao; Doi, Yasuo; Takita, Satoshi +10 more

We present an initial analysis of the properties of an all-sky image obtained by the Far-Infrared Surveyor (FIS) onboard the AKARI satellite, at 65 µm (N60), 90 µm (WIDE-S), 140 µm (WIDE-L), and 160 µm (N160). An absolute flux calibration was determined by comparing the data with COBE/DIRBE data sets; the intensity range wa…

A study on the mid-infrared sources that dramatically brightened

Matsunaga, Noriyuki; Nakada, Yoshikazu; Ita, Yoshifusa +5 more

We present results of near-infrared (NIR) photometric and spectroscopic observations of mid-infrared (MIR) sources that brightened dramatically. Using Infrared Astronomical Satellite (IRAS), AKARI, and Wide-field Infrared Survey Explorer (WISE) point source catalogs, we found that four sources (IRAS 19574+4941, V2494 Cyg, IRAS 22343+7501, and V583…