Science Update: SN2011fe in M101 (Pinwheel Galaxy) Peter Nugent (LBNL/UCB)
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Transcript of Science Update: SN2011fe in M101 (Pinwheel Galaxy) Peter Nugent (LBNL/UCB)
Science Update: Science Update: SN2011fe in M101 SN2011fe in M101 (Pinwheel Galaxy)(Pinwheel Galaxy)
Peter Nugent (LBNL/UCB)Peter Nugent (LBNL/UCB)
AAAC Meeting
Major PointsMajor 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
PTF (2009-2013)PTF (2009-2013)
92 Mpixels, 1” resolution, 2.0” seeing, R/g=21 in 60s2 cadences SN & Dynamic with g in dark time & R in bright time
AAAC Meeting
PTF SciencePTF SciencePTF Key ProjectsPTF Key Projects
Various SNeVarious SNe Dwarf novaeDwarf novae
Transients in nearby Transients in nearby galaxiesgalaxies
Core collapse SNeCore collapse SNe
RR LyraeRR Lyrae Solar system objectsSolar system objects
CVsCVs AGNAGN
AM CVnAM CVn BlazarsBlazars
Galactic dynamicsGalactic dynamics LIGO & Neutrino LIGO & Neutrino transientstransients
Flare starsFlare stars Hostless transientsHostless transients
Nearby star kinematicsNearby star kinematics Orphan GRB afterglowsOrphan GRB afterglows
Type Ia SupernovaeType Ia Supernovae Eclipsing stars and Eclipsing stars and planetsplanets
Tidal eventsTidal events H-alpha ½ sky surveyH-alpha ½ sky surveyThe power of PTF resides in its diverse science goals and follow-up.
AAAC Meeting
Real-time PipelineReal-time Pipeline
NERSC GLOBAL FILESYSTEM240TB
DataTransferNodes
ScienceGatewayNode 2
ScienceGatewayNode 1
Observatory PTF Collaboration
via Web
Processing/db Carver3200
core IBM
Subtractions
~1 hour turnaround
AAAC Meeting
PTF: Real or BogusPTF: Real or BogusPTF 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
Real or BogusReal or Bogus
230 bogus candidates, 2 variable stars, 4 asteroids and the youngest Type Ia supernovae observed to
date….
PTF10ygu: Caught 2 days after explosion
AAAC Meeting
Citizen Scientists…Citizen Scientists…
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.
PTF11gdm
AAAC Meeting
PTF Sky CoveragePTF Sky Coverage
1000
100
100
0
To date:• 1301 Spectroscopically typed supernovae• 105 Galactic Transients• 104 Transients in M31• 2.5 years, over 1 million images taken. • 35 refereed publications.
AAAC MeetingPeter Nugent 12
SN 2011fe (PTF11kly)SN 2011fe (PTF11kly)
180k views on YouTube, 50+ newspaper articles, PBS Newshour, BBC, NPR…
AAAC MeetingPeter Nugent 13
Swift HST
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.
AAAC MeetingPeter 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!
Ca II
Si II
S II
Mg II
Fe II
O I
Ca II
AAAC MeetingPeter Nugent
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 MeetingPeter Nugent 19
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.
AgenciesAgencies