CARTA (Cube Analysis and Rendering Tool for Astronomy) - - PowerPoint PPT Presentation

CARTA

(Cube Analysis and Rendering Tool for Astronomy)

Developments, features, and demo

Kuo-Song Wang

• n behalf of the CARTA team


EA ALMA/45m/ASTE Users Meeting 2018 2018/12/26 @ NAOJ

The mission of CARTA

• CARTA is the Cube Analysis and Rendering Tool for

Astronomy, a new image visualization and analysis tool designed for the ALMA, the VLA, and the SKA pathfinders.

• As the image size increases drastically with modern

telescopes in recent years, viewing an image with a local image viewer or with a remote image viewer via the ssh protocol becomes less efficient.

• The mission of CARTA is to provide usability and

scalability for the future by utilizing modern web technologies and computing parallelization.

As of ALMA cycle 6

band 3 4 5 6 7 8 9 10

• rep. frequency (GHz)

100 150 185 230 345 460 650 870

12m single pointing FOV (arcsec)

52 34 28 22 15 11 8 6

best beam size (arcsec)

0.042 0.028 0.0227 0.0183 0.0278 0.0459 0.0325 0.0243

__at which configuration

C43-10 C43-10 C43-10 C43-10 C43-8 C43-7 C43-7 C43-7

• approx. max. single pointing

image size (pixel) assuming 5 pixel per beam and double FOV

12381
 px 12143
 px 12335
 px 12022
 px 5396
 px 2397
 px 2462
 px 2469
 px

• approx. file size per 3840-channel

2.25
 TB 2.16
 TB 2.23
 TB 2.12
 TB 426
 GB 84
 GB 89
 GB 89
 GB

single 150-pt square mosaic: image size (arcsec)

330 220 180 145 95 72 51 38

single 150-pt square mosaic: image size (pixel)

39286
 px 39286
 px 39648
 px 39617
 px 17086
 px 7843
 px 7846
 px 7819
 px

single 150-pt square mosaic: file size per 3840-channel (GB)

22.61
 TB 22.61
 TB 23.03
 TB 22.99
 TB 4.28
 TB 901
 GB 902
 GB 896
 GB

__note: with best angular resolution, 150-pt mosaic

• bservation may not be realistic

due to too long integration time.

Client-Server architecture

via https://www.newequipment.com/industry-trends/how-avoid-bummer-vacation

CARTA development

• The development of the CARTA project is a joint effort from (in

alphabetical order)

• Academia Sinica, Institute of Astronomy and Astrophysics (ASIAA)


<server side, test, CI/CD>

• Inter-university Institute for Data Intensive Astronomy (IDIA)


<client side>

• National Radio Astronomy Observatory (NRAO)


<server side>

• Department of Physics, University of Alberta


<test>

CARTA release

• Initial release v1.0: December 21, 2018
• Official release announcement coming very soon
• Desktop release only with “local” and “remote” versions
• Server release in v1.1: Q1 2019
• Download and follow the instructions via the homepage
• Online user manual


CARTA features

• Good performance to view moderate-size images (few

kpx) with commercial laptop or desktop

• Basic image viewing capability
• Basic per-channel and per-cube histogram
• Basic spatial and spectral profile viewing capability
• Basic animation capability
• Export as png or tsv text file.

Demo

(SSD)

268 MB 1.1 GB 4.3 GB

Quadratic relationship SWAP in use

Performance of loading images

67 MB

Future plan and major goals

• Version 1.0: current release, including basic image and profile viewing

capability.

• Version 1.1: basic region of interest (ROI) support and relevant analysis tools

(statistics, histogram, and profilers).

• Version 1.2: WCS group support which allows multiple images to be aligned

in spatial and spectral domains.

• Next version: multiple-panel view
• Next version: moments image, position-velocity image, and scripting interface
• Next version: interactive clean
• Next version: collaborative mode
• Next version: misc.

Send us feedback and questions, please~

carta_helpdesk@asiaa.sinica.edu.tw