Some more background: in astronomy we tend to alternate 'survey' missions which discover new sources (stars, galaxies, etc) and 'pointed' missions which follow up those discoveries with detailed study. The last all sky infrared survey was IRAS in 1983;
Quote from: jcm on 12/14/2009 01:26 pmSome more background: in astronomy we tend to alternate 'survey' missions which discover new sources (stars, galaxies, etc) and 'pointed' missions which follow up those discoveries with detailed study. The last all sky infrared survey was IRAS in 1983;With regards to the underlined text above: That's a load of BS. The last infrared all sky survey was not IRAS in 1983, but the Japanese Akari mission (the former ASTRO-F) from February 2006 to August 2007. The first infrared all-sky survey was IRAS in 1983. More than 20 years later, the Japanese did a much better survey, making good use of the vastly improved IR sensor technology.
Quote from: jcm on 12/14/2009 01:26 pmSome more background: in astronomy we tend to alternate 'survey' missions which discover new sources (stars, galaxies, etc) and 'pointed' missions which follow up those discoveries with detailed study. The last all sky infrared survey was IRAS in 1983; With regards to the underlined text above: That's a load of BS. The last infrared all sky survey was not IRAS in 1983, but the Japanese Akari mission (the former ASTRO-F) from February 2006 to August 2007. The first infrared all-sky survey was IRAS in 1983. More than 20 years later, the Japanese did a much better survey, making good use of the vastly improved IR sensor technology. WISE, in it's current form is basically re-doing Akari, less than 3 years later, but concentrating more on the shorter wavelengths within the Infrared part of the spectrum and higher sensitivity.I find the fact that NASA is conveniantly overlooking Akari slightly annoying.
Quote from: woods170 on 12/14/2009 06:45 pmQuote from: jcm on 12/14/2009 01:26 pmSome more background: in astronomy we tend to alternate 'survey' missions which discover new sources (stars, galaxies, etc) and 'pointed' missions which follow up those discoveries with detailed study. The last all sky infrared survey was IRAS in 1983; With regards to the underlined text above: That's a load of BS. The last infrared all sky survey was not IRAS in 1983, but the Japanese Akari mission (the former ASTRO-F) from February 2006 to August 2007. The first infrared all-sky survey was IRAS in 1983. More than 20 years later, the Japanese did a much better survey, making good use of the vastly improved IR sensor technology. WISE, in it's current form is basically re-doing Akari, less than 3 years later, but concentrating more on the shorter wavelengths within the Infrared part of the spectrum and higher sensitivity.I find the fact that NASA is conveniantly overlooking Akari slightly annoying.Ouch. I did forget Akari. The Akari source catalog has of course not yet been publicly released (as far as I can telll) so at this moment IRAS is still the only all sky survey available to the community. That's not meant to be a complaint - it took us years to do the Chandra catalog which just came out a few months ago. I think the combined Akari and WISE datasets will be very exciting, and I apologize to my Japanese and European colleagues for overlooking them. (At least I did nod to ISO and Herschel). Mea maxima culpa. - Jonathan