Real-Time Fast Transient Detection with Interferometers

Transcription

1 Real-Time Fast Transient Detection with Interferometers Casey Law UC Berkeley 1/14

2 The State of the Art Parkes Observatory: a fast transients workhorse 2 /14

3 The State of the Art Testing GR Parkes Observatory: a fast transients workhorse 2 /14

4 The State of the Art Testing GR Extragalactic transients Parkes Observatory: a fast transients workhorse 2 /14

5 The State of the Art Testing GR Extragalactic transients Parkes Observatory: a fast transients workhorse Exoplanets and dwarfs 2 /14

6 The State of the Art Need more examples Testing GR Extragalactic transients Parkes Observatory: a fast transients workhorse Exoplanets and dwarfs 2 /14

7 The State of the Art Need more examples Testing GR Interference limited Extragalactic transients Parkes Observatory: a fast transients workhorse Exoplanets and dwarfs 2 /14

8 The State of the Art Need more examples Testing GR Interference limited Extragalactic transients Multiwavelength counterparts Parkes Observatory: a fast transients workhorse Exoplanets and dwarfs 2 /14

9 Fast Imaging Movie of ATA observation of Crab giant pulse (at 1/40th speed) 3 /14

10 Fast Imaging Movie of ATA observation of Crab giant pulse (at 1/40th speed) 3 /14

11 4 /14

12 The JVLA Correlator 5 /14

13 Success! Bottleneck improved from 20 to ~100 MB/s Integration time of 10 ms now possible 6 /14

14 Success? Bottleneck improved from 20 to ~100 MB/s Entering the Petascale 3 PB/year Integration time of 10 ms now possible 1 Tflops 7 /14

15 Solutions to the Big Data Challenge Solution 1: Brute Force Henyey compute cluster at UCB Solution 2: Real-time Processing... LHC 10 7 :1 compression 8 /14

16 Closure Quantities Combine visibilities on closed loop 1 θ 12 + θ 23 + θ 31 v 12 * v 23 * v 31 Independent of source location and calibration /14

17 Closure Quantities Combine visibilities on closed loop 1 θ 12 + θ 23 + θ 31 v 12 * v 23 * v 31 Independent of source location and calibration /14

18 Testing the Theory Bispectrum detects regardless of location and calibration ATA lightcurves toward B Some sensitivity loss compared to imaging 10/14

19 SNR Simple, Yet Resistant to Interference VLA dynamic spectrum of dispersed Crab pulse Bispectra can distinguish sources from RFI sigma_b 11/14

20 SNR Simple, Yet Resistant to Interference VLA dynamic spectrum of dispersed Crab pulse Bispectra can distinguish sources from RFI sigma_b 11/14

21 Yeah, but does it work? Bispectrum lightcurve and diagnostic for VLA data toward J (Law et al. 2012, 12/14

22 Yeah, but does it work? Bispectrum lightcurve and diagnostic for VLA data toward J Pulse localized! (Law et al. 2012, 12/14

23 Save the Data with the Science! Conceptual pipeline for bispectrum transient detection 13/14

24 Save the Data with the Science! 100s Gb/s Conceptual pipeline for bispectrum transient detection 13/14

25 Save the Data with the Science! 100s Gb/s 1 Gb/s Conceptual pipeline for bispectrum transient detection 13/14

26 Save the Data with the Science! 100s Gb/s 1 Gb/s 1 Mb/s Conceptual pipeline for bispectrum transient detection 13/14

27 Ten Years Later... Bigger Data! Survey machines Wide-field, commensal 14/14

28 Ten Years Later... Bigger Data! Survey machines Wide-field, commensal Solutions: 14/14

29 Ten Years Later... Bigger Data! Survey machines Wide-field, commensal Solutions: Triggering 14/14

30 Ten Years Later... Bigger Data! Survey machines Wide-field, commensal Solutions: Triggering Real-time science detection 14/14

31 Ten Years Later... Bigger Data! Survey machines Wide-field, commensal Solutions: Triggering Real-time science detection Real-time flagging 14/14