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Science Update: SN2011fe in M101 (Pinwheel Galaxy)

Science Update: SN2011fe in M101 (Pinwheel Galaxy). Peter Nugent (LBNL/UCB). Major Points. The integrated role of all 3 agencies in the discovery and follow-up of SN 2011fe. The level of computing required to deliver such discoveries. PTF (2009-2013).

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Science Update: SN2011fe in M101 (Pinwheel Galaxy)

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  1. Science Update: SN2011fe in M101 (Pinwheel Galaxy) Peter Nugent (LBNL/UCB)

  2. Major Points • The integrated role of all 3 agencies in the discovery and follow-up of SN 2011fe. • The level of computing required to deliver such discoveries. AAAC Meeting

  3. PTF (2009-2013) 92 Mpixels, 1” resolution, 2.0” seeing, R/g=21 in 60s 2 cadences SN & Dynamic with g in dark time & R in bright time AAAC Meeting

  4. PTF Science The power of PTF resides in its diverse science goals and follow-up. AAAC Meeting

  5. PTF Pipeline 128 MB/90s 50 GB/night AAAC Meeting

  6. Real-time Pipeline PTF Collaboration via Web Observatory Subtractions Processing/db Carver 3200 core IBM Data Transfer Nodes Science Gateway Node 2 Science Gateway Node 1 NERSC GLOBAL FILESYSTEM 240TB ~1 hour turnaround AAAC Meeting

  7. PTF: Real or Bogus • PTF produces 1 million candidates during a typical night: • Most of these are not real • Image Artifacts • Misalignment of images due to poor sky conditions • Image saturation from bright stars • 50k are asteroids • 1-2k are variable stars • 100 supernovae • 1-2 new, young supernovae or other explosions Help from Bloom et al. NSF-CDI project: Real-time Classification of Massive Time-series Data Streams AAAC Meeting

  8. Real or Bogus moon 4096 X 2048 CCD images - over 3000 per night AAAC Meeting

  9. Real or Bogus PTF10ygu: Caught 2 days after explosion 230 bogus candidates, 2 variable stars, 4 asteroids and the youngest Type Ia supernovae observed to date…. AAAC Meeting

  10. Citizen Scientists… PTF11gdm http:// supernova.galaxyzoo.org keeps chugging along (Smith et al., 2010) Typically we have them scan ~200 candidates in 12 hrs after the night is finished. They get the list of the top 100 real-bogus, top 100 S/N, and top 100 via host-size of all new candidates. AAAC Meeting

  11. PTF Sky Coverage 1000 100 100 • To date: • 1301 Spectroscopically typed supernovae • 105 Galactic Transients • 104 Transients in M31 • 2.5 years, over 1 million images taken. • 35 refereed publications. 0 AAAC Meeting

  12. SN 2011fe (PTF11kly) 180k views on YouTube, 50+ newspaper articles, PBS Newshour, BBC, NPR… AAAC Meeting 12 Peter Nugent

  13. SN 2011fe was caught within 11 hrs +/- 20 min. of explosion. First spectra ~24 hr later. Peaked @ mag 9.9, making it the 5th brightest SN in last 100 years. Swift HST AAAC Meeting 13 Peter Nugent

  14. SYNAPPS spectrum synthesis fits on NERSC’s Hopper commenced 1 hour after first spectrum was reduced. Finished analysis 30 hours after SN was first detected! Mg II Fe II S II Si II O I Ca II Ca II AAAC Meeting 14 Peter Nugent

  15. AAAC Meeting 15 Peter Nugent

  16. Rules out red giant companions and a lot of double degenerate models. AAAC Meeting 16 Peter Nugent

  17. HST Pre-imaging of the field where SN 2011fe was found. AAAC Meeting 17 Peter Nugent

  18. Constraints on the progenitor system. Basically all we can have are a double degenerate system or a low mass main sequence companion. Nature: Nugent et al. and Li et al. AAAC Meeting Peter Nugent

  19. Agencies • DOE/HEP: NERSC computing facilities, SCIentific Discovery through Advanced Computing program and staff and scientific leadership in the SN Ia experiment for PTF. • NSF: Direct support of PTF and support from the Cyber Enabled Discovery and Innovation Program - real-time classification. • NASA: Swift, Chandra and HST for both pre-explosion imaging (optical and x-ray) and follow-up after discovery in the ultra-violet. AAAC Meeting 19 Peter Nugent

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