CAS ASA upd update tes 2018 2018 Recent Progress and Future - PowerPoint PPT Presentation

CAS ASA upd update tes 2018 2018 Recent Progress and Future Plans of CASA and Pipeline Takeshi Nakazato (NAOJ) on behalf of CASA and Pipeline teams

CASA clean/tclean mosaic issues • Announcement to ALMA users https://almascience.nao.ac.jp/news/public-announcement-of-casa-imaging- issues-affecting-some-alma-products • See NAASC Memo 117 for technical detail http://library.nrao.edu/public/memos/naasc/NAASC_117.pdf – Mosaic Issue #1: 7m-array data, Cycle 1-4 (< 5.1.1) too high flux density due to non-optimal definition of the PB – Mosaic Issue #2: both 12m- and 7m-arrays, Cycle 5 (5.1.1) aliasing due to wrong use of truncated PB for visibility gridding – Basically the problem is incorrect modeling of antenna primary beam – Based on the analysis using simulated data, those issues have gone in the Cycle 6 release (5.4.0) 2

CASA Common Astronomy Software Applications (CASA) and ALMA Pipeline • A data reduction and analysis software of data observed by radio astronomical telescopes, both interferometer and single-dish • Developed in collaboration with NAOJ, NRAO, ESO, ASIAA and IDIA • CASA officially supports ALMA, VLA, Nobeyama 45-m, and ASTE • ALMA Pipeline is developed on top of CASA • All ALMA PI data are processed by CASA and Pipeline before delivered to observers and processed data are archived • The latest CASA release is 5.4.0 (for ALMA) and 5.4.1 (for VLA) • Schedule of next year: – CASA 5.5 (February 2019) – CASA 6.0 (April 2019) – first Python 3 release – CASA 5.6 with Pipeline for Cycle 7 (July 2019) 3

CASA CASA Progress (as of 5.4.0) See https://casa.nrao.edu/casadocs/ for detail Interferometry/General 4

CASA CASA Progress (as of 5.4.0) See https://casa.nrao.edu/casadocs/ for detail Single-Dish 5

CASA 6

CASA 7

CASA Support of Nobeyama 45m and ASTE • Pipeline (and underlying CASA) successfully processed NRO 45m telescope data. Improvement ongoing. • Data reduction test using ASTE data is ongoing 8

CASA 9

CASA Priorities for CASA 5.5/5.6 10

CASA Major Development Activities 11

CASA CASA 6 • Compatible with Python 3.x (development based on 3.6) • Modularization: CASA Tasks and Tools from casatasks import tclean from casatasks import sdbaseline from casatools import ia • Enable collaboration with Jupyter Notebook • Migration schedule – CASA 6.0 (April 2019) – compatible with CASA 5.5 – CASA 5.6 for Cycle 7 (July 2019) – CASA 6.x & CASA 5.x dual release (January 2020) – CASA 6.x only for Cycle 8 (July 2020) – deprecate 2.7 based CASA 12

CASA Interaction with Users https://casa.nrao.edu • CASA Liaison • CASA Newsletter – twice a year • CASA User Survey – ~100 replies – ~10 from Asia Your feedback is greatly appreciated! 13