The GPIES Data Cruncher:An Automated Data Processing System for the Gemini Planet

Imager Exoplanet SurveyJason J. Wang, Pauline Arriaga, Marshall D. Perrin, Dmitry Savransky, James R. Graham,Christian Marois, Julien Rameau, Jean-Baptise Ruffio, and the GPI Team

c

Summary:

• The Data Cruncher can automatically process all science and calibration data from the GPI Exoplanet Survey and more• Sensitivity curves and multiple PSF subtraction products are produced one hour after the data are available• The Super Data Cruncher can also run on a supercomputing cluster and reprocess the entire campaign in a few hours

Acknowledgements: This research was supported in part by NASA NNX15AD95G, NASA NNX11AD21G, NSF AST-0909188, and the University

of California LFRP-118057. The GPI project has been supported by Gemini Observatory, which is operated by AURA, Inc., under a cooperativeagreement with the NSF on behalf of the Gemini partnership: the NSF (USA), the National Research Council (Canada), CONICYT (Chile), theAustralian Research Council (Australia), MCTI (Brazil) and MINCYT (Argentina).

References:Marois, C., Correia, C., Galicher, R., et al. 2014, Proc SPIE, 9148. Perrin, M. D., Maire, J. , Ingraham, P., et al. 2014, Proc SPIE, 9147.Wang, J. J., Ruffio, J.-B., De Rosa, R. J., et al. 2015, Astrophysics Source Code Library, record ascl:1506.001.

Crunchable Data

GPI Exoplanet Survey Science• 1 hour H-band integral field spectroscopy planet search• 10 minute H-band snapshot broadband imaging polarimetry • 1 hour H-band deep broadband imaging polarimetryGPIES Follow-up• Multi-epoch deep follow-up observations in multiple bandsGPI Queue Programs• All coronagraphic data taken for GPIES members’ queue programsCalibrations• All calibration data taken by GPI (which are publically available)

Architecture

Super Data Cruncher

Reduced Data Products

0

0.5

1

1.5

2

2.5

3

0 5 10 15 20 25 30

Runti

me

(Hours

)

# of Datsets and Nodes

Weak Scaling

SummitTaken

DropboxStored & Synced

MySQL DBLogged

Quality Checked

• All data products produced within ~1 hour of the data being available

• All data are synced to Dropbox for accessibility

Datacubes PSF Subtracted Images Contrast Curves

CalibrationspyKLIP: ADI+SDI

pyKLIP: ADI

pyKLIP: ADI+SDIw/ methane

cADI

• Runs on NERSC’s Edison supercomputer (5576 nodes, 133,824 cores, 357 TB RAM)• Uses MPI for inter-node communication• < 100 lines of code needed to implement the Super Data Cruncher• Reprocesses the entire campaign in a few hours

Spectral Cube

Polarimetry Cube

Processing BackendNetwork Interface

Web Socket or MPI

Processing Controller

High-level Python logic that controls dataflow through the various pipelines

Uses queues to communicate between threads and monitors for

synchronization

GPI DRP(Perrin et al. 2014)

TLOCI(Marois et al. 2014)

pyKLIP(Wang et al. 2015)

cADI(UdeM pipeline)

Realtime Scanner

Queues new datasets for processing and updates

the GPIES Wiki

Reprocessor

Queries database to find and process existing datasets on demand

Update Wiki

• Written in Python with some pipeline components written in IDL• Highly modularized, multithreaded, and asynchronous

New Files

Save Reduced

Data Products

SendCommands

Query for data

Check for bad files

Data Flow

jwang@astro.berkeley.edu