BL on LOFAR An overview of the Breakthrough Listen on LOFAR - - PowerPoint PPT Presentation

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BL on LOFAR An overview of the Breakthrough Listen on LOFAR - - PowerPoint PPT Presentation

Sep 20, 2023 142 likes •445 views

BL on LOFAR An overview of the Breakthrough Listen on LOFAR International Stations program Griffin Foster LOFAR-UK (51 8 40.42 N, 1 26 18.89 W) Chilbolton, UK LBA: 30 90 MHz HBA: 110 240 MHz 96 Elements

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BL on LOFAR

An overview of the Breakthrough Listen on LOFAR International Stations program Griffin Foster

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LOFAR-UK (51° 8 40.42 N, 1° 26 18.89 W) ′ ″ ′ ″ Chilbolton, UK

LBA: 30 – 90 MHz HBA: 110 – 240 MHz 96 Elements LBA: 70 m effective diameter HBA: 56 m effective diameter

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I-LOFAR (53° 5 43.15 N, 7° 54 55.95 W) ′ ″ ′ ″ Birr, Ireland

195 kHz Sub-bands 488 Steerable 8-bit ’beamlets’ HBA: 1st stage analogue beamformer (30 deg FWHM) LBA: complete hemisphere

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LOFAR Sweden (57° 23 35 N, 11° 55 4 E ′ ″ ′ ″ ) Onsala, Sweden

Uniform digital interface Local-mode observing community Sky-mapping

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Previous Science Use Cases

Pulsar Monitoring Fast Radio Burst Surveys Solar Monitoring Ionospheric Scintillation

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Why is single station observing under-utilized?

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Why is single station observing under-utilized? Lack of high-level observing interface

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Why is single station observing under-utilized? Lack of generic data recorder (which writes to standard formats)

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Breakthrough Listen on LOFAR back-end Reuse and integrate existing code:

Observing controller [iLiSA / T. Carozzi (OSO)] Observing Scheduler [J.-M. Griessmeier (Nancay)] Sky-mapper [SWHT / G. Foster] Statistics Data Wrappers [LSS / G. Foster]

Build interface to use BL data recorder:

Generic beamlet voltage recorder to GUPPI raw format GPU-based spectrometer to channelize and integrate Write high-frequency resolution SETI data products

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BL Head Node UCC1 Compute Node UCC2 Compute Node UCC3 Compute Node UCC4 Compute Node NUIG1 Storage Node Realta Cluster

Node Provisioning (Ansible) Observing Pipeline management

I-LOFAR

BL Head Node adagio1 Compute Node adagio2 Compute Node ARTEMIS Cluster

Node Provisioning (Ansible) Observing Pipeline management

LOFAR-UK

BL Storage Node adagio3 Compute Node adagio4 Compute Node

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BL Beamlet Data Recorder Stack

Capture beamlet voltage data

Total data rate: 3.125 Gbps (34 TB/day) 16, 8, 4-bit modes (48 MHz, 96 MHz, 192 MHz) Observing runs are typically 3 days Record up to 130 TB to disk on storage node

Use BL GPU-based spectrometer to channelize and integrate

Standard formats: GUPPI raw, filterbank, BL HDF5 Multiple data products: SETI, Pulsar, Solar, …

During ILT mode use compute nodes to run search pipelines Move results to long-term storage and clear storage node

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75 MHz Sky Map

(1 subband, 1 snapshot)

UVW Coverage Spherical Map

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75 MHz Sky Map

(1 subband, 3 snapshots)

UVW Coverage Spherical Map

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75 MHz Sky Map

(1 subband, 6 snapshots)

UVW Coverage Spherical Map

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75 MHz Sky Map

(1 subband, 15 snapshots)

UVW Coverage Spherical Map

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75 MHz 24 Hour Sky Map

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The Breakthrough Listen on LOFAR Survey

Observations during local mode (~60 hours / week) 8 x 12 MHz fixed declination drift survey Covering LBA (30-90 MHz) and HBA (110-240 MHz), focus on 110-190 MHz 1.43 Hz resolution (8 million channels over 12 MHz), 5.4 seconds Multi-site RFI mitigation using I-LOFAR and LOFAR-UK (and Sweden in the future) Record correlation products to generate daily sky maps Record additional Pulsar/FRB and solar data products

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The Breakthrough Listen on LOFAR Survey

Observations during local mode (~60 hours / week) 8 x 12 MHz fixed declination drift survey Covering LBA (30-90 MHz) and HBA (110-240 MHz), focus on 110-190 MHz 1.43 Hz resolution (8 million channels over 12 MHz), 5.4 seconds Multi-site RFI mitigation using I-LOFAR and LOFAR-UK (and Sweden in the future) Record correlation products to generate daily sky maps Record additional Pulsar/FRB and solar data products

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The Breakthrough Listen on LOFAR Survey

Observations during local mode (~60 hours / week) 8 x 12 MHz fixed declination drift survey Covering LBA (30-90 MHz) and HBA (110-240 MHz), focus on 110-190 MHz 1.43 Hz resolution (8 million channels over 12 MHz), 5.4 seconds Multi-site RFI mitigation using I-LOFAR and LOFAR-UK (and Sweden in the future) Record correlation products to generate daily sky maps Record additional Pulsar/FRB and solar data products

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The Breakthrough Listen on LOFAR Survey

Observations during local mode (~60 hours / week) 8 x 12 MHz fixed declination drift survey Covering LBA (30-90 MHz) and HBA (110-240 MHz), focus on 110-190 MHz 1.43 Hz resolution (8 million channels over 12 MHz), 5.4 seconds Multi-site RFI mitigation using I-LOFAR and LOFAR-UK (and Sweden in the future) Record correlation products to generate daily sky maps Record additional Pulsar/FRB and solar data products

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The Breakthrough Listen on LOFAR Survey

Observations during local mode (~60 hours / week) 8 x 12 MHz fixed declination drift survey Covering LBA (30-90 MHz) and HBA (110-240 MHz), focus on 110-190 MHz 1.43 Hz resolution (8 million channels over 12 MHz), 5.4 seconds Multi-site RFI mitigation using I-LOFAR and LOFAR-UK (and Sweden in the future) Record correlation products to generate daily sky maps Record additional Pulsar/FRB and solar data products

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The Breakthrough Listen on LOFAR Survey

Observations during local mode (~60 hours / week) 8 x 12 MHz fixed declination drift survey Covering LBA (30-90 MHz) and HBA (110-240 MHz), focus on 110-190 MHz 1.43 Hz resolution (8 million channels over 12 MHz), 5.4 seconds Multi-site RFI mitigation using I-LOFAR and LOFAR-UK (and Sweden in the future) Record correlation products to generate daily sky maps Record additional Pulsar/FRB and solar data products

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The Breakthrough Listen on LOFAR Survey

Observations during local mode (~60 hours / week) 8 x 12 MHz fixed declination drift survey Covering LBA (30-90 MHz) and HBA (110-240 MHz), focus on 110-190 MHz 1.43 Hz resolution (8 million channels over 12 MHz), 5.4 seconds Multi-site RFI mitigation using I-LOFAR and LOFAR-UK (and Sweden in the future) Record correlation products to generate daily sky maps Record additional Pulsar/FRB and solar data products

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The Breakthrough Listen on LOFAR Survey

Observations during local mode (~60 hours / week) 8 x 12 MHz fixed declination drift survey Covering LBA (30-90 MHz) and HBA (110-240 MHz), focus on 110-190 MHz 1.43 Hz resolution (8 million channels over 12 MHz), 5.4 seconds Multi-site RFI mitigation using I-LOFAR and LOFAR-UK (and Sweden in the future) Record correlation products to generate daily sky maps Record additional Pulsar/FRB and solar data products FoV: 20 sq. deg. (HBA 240 MHz) - 800 sq. deg. (LBA 30 MHz)

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Compute nodes and storage nodes setup at both I-LOFAR and LOFAR-UK Setting up the BL head node at LOFAR-UK tomorrow (Dave and I have a train in about 30 minutes) Setting up the BL head node at I-LOFAR next week Allocated test observations in November

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