1. Planck Satellite Revisited Anne Lähteenmäki Metsähovi Radio Observatory Helsinki University of Technology TKK

2. Anne Lähteenmäki Metsähovi Radio Observatory TKK CMB missions 77 0.3  Planck 2010 5’  30’

3. Anne Lähteenmäki Metsähovi Radio Observatory TKK Planck ― ESA Launch in January 2009 together with Herschel satellite ~4 months to reach L2 Whole sky covered once in 6 months → several cycles

4. Anne Lähteenmäki Metsähovi Radio Observatory TKK Payload Two instruments, 9 frequencies + polarization: Low Frequency Instrument LFI (30 – 77 GHz), 20 K High Frequency Instrument HFI (100 – 857 GHz), 0.1 K

5. Anne Lähteenmäki Metsähovi Radio Observatory TKK The supremacy of Planck more frequencies higher resolution higher sensitivity (also polarization)

6. Anne Lähteenmäki Metsähovi Radio Observatory TKK Planck foregrounds Identification and elimination of contaminating foreground radio sources ”Garbage for cosmologists = science for astronomers!” Planck will produce the most complete radio source catalogs ever at high radio frequencies (30 -857 GHz)

7. Anne Lähteenmäki Metsähovi Radio Observatory TKK Planck foregrounds complete samples of all classes of radio sources, possibly also new source types statistical studies, classification of sources... properties of individual source classes shape of the radio spectra → complete SEDs correlation between different frequencies variability at several timescales modelling of radio sources... Planck data catalogs

8. Anne Lähteenmäki Metsähovi Radio Observatory TKK Quick Detection System (QDS) Software package that detects unusual point sources in the time-ordered datastream of Planck in one or two weeks from the initial observation almost realtime follow-up with other instruments

9. Anne Lähteenmäki Metsähovi Radio Observatory TKK QDS parameters Emphasis mostly on “surprising” events & sources 1. New flaring objects Includes objects that are expected to be very faint, for example, XBLs, TeV sources etc 2. Inverted spectrum-sources 3. Fast events 4. Strong events in well-known sources

10. Anne Lähteenmäki Metsähovi Radio Observatory TKK Planck WGs and CTs Working Groups (science programme) WG 6 Extragalactic point sources (AGNs) WG 7 Galactic sources (microquasars, stellar evolution) Core Teams (all practical work during mission) CTA-09 Non-CMB science

11. Anne Lähteenmäki Metsähovi Radio Observatory TKK Planck Baseline Core Science Programme (2001) The Astrophysics of Quasars and BL Lac Objects + 4 others including GPS sources, statistical properties, follow-up etc The Final Planck Science Programme will be defined in 2008 ”The Bluebook” CLASSIFIED

12. Anne Lähteenmäki Metsähovi Radio Observatory TKK Work @ Metsähovi Before mission (1999  2008) mapping, analysis & modelling of foreground sources (BL Lac & GPS objects, faint quasars, variability) + Pre-launch catalogs  dedicated source samples collected and observed at Metsähovi contain hundreds of sources simulations, methods, tools, QDS During mission (2009  2011) foreground mapping continues, follow-up observations from ground & with satellites, QDS software operations, publication of QDS results After mission (2011  ) Analysis, research and publication of Planck results, follow-up observations