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ALMA Phase Correction Workshop

Allegro, Leiden, May 30 – June 3, 2016

A workshop focused on how to improve the ALMA phase corrections is jointly organized by the ALMA observatory and Allegro. It will be held at Leiden Observatory from May 30 – Jun 3. Participation is by invitation only. Find more details below:


 

DESCRIPTION

ALMA imaging observations – particularly on long baselines – are often limited more by phase fluctuations than atmospheric transmission or PWV. To enable more long-baseline or high-frequency observations, or improve existing data, we need to look at ways to improve the phase correction.

The aims of this workshop are:

  1. Review the methods that could improve ALMA phase correction and image fidelity. Including (but not limited to) baseline accuracy, WVR corrections, pressure and other environmental fluctuations, cycle times, online/offline WVR correction.
  2. Summarise the results from the related test observations during the 2014 and 2015 long-baseline campaigns, and identify and quantify the methods that do produce noticeable improvements.
  3. Make recommendations for changes in ALMA software, hardware and/or observing methods which will improve phase correction

 

PROGRAM
A pdf detailed version of the program can be found in this link: Phasemeeting_final_agenda
 

Mon 30/05 (Afternoon Session) Room HL 204
13:30-13:45

Welcome & Logistics

Remo

13:45-14:15

Outline of the meeting & Topic Organisation

Ed – Bill

Single Source Statistics
14:30-15:00

ALMA Long Baseline Campaign 2014/2015 – Basic Phase Characteristics & Pseudo cycling

Satoki

15:00-15:20

COFFEE BREAK
15:20-15:50

ALMA Long Baseline Campaign 2014 – Weather Correlations & Use of the Two-Point-Deviation

Luke

16:00-16:30

Examination of the GonoGo criterion – Results from 2014/2015 –

Bill

16:40-18:00

Open Discussion Time

 

Tue 31/05 (Morning Session) Room HL 204
WVR Discussions
09:00-09:45

Introduction to Radiometer-based Phase Correction – Principles, Instrumentation and Application

Richard

10:00-10:20

The O2 Oxygen sounder – Applicability in better atmosphere models

George

10:20-10:30

COFFEE BREAK
10:30-10:50

WVR application timescale, 1 sec vs. 6 sec

Ed

11:00-11:30

Optimising WVR solutions (scaling) – improved phases and images

Luke

11:40-12:00

Cloud Continuum removal – Effectiveness, applicability

Bill

12:10-12:30

TelCal WVR online, monitoring and phase RMS calculations

Dominique

12:40-13:00

Correlation of changes with measured pressure over the array

Satoki
Tue 31/05 (Afternoon Session) Room HL 204
14:00-15:00

Open Discussion Time
15:00-15:20

COFFEE BREAK
Antenna Position Measurements
15:20-15:40

‘Inside’ Tc Antpos – phase correction, analysis, SPW combination and plots

Dominique

15:50-16:20

Long baseline antenna measurements

Todd

16:20-16:40

COFFEE BREAK
16:40-17:10

Are antenna position changes related to tropospheric changes?

Ed

17:20-17:40

Suggested observing strategies for the next long baselines to reduce the effect of ‘changes’

Ed

17:40-18:30

Open Discussion Time

 

Wed 01/06 (Morning Session) Room HL 106
Phase referencing statistics
09:00-09:20

Is the GonoGo criteria good for estimating the phase referencing scheme

Bill

09:30-10:00

Phase referencing statistics and correlations – Fast switching experiments 2014/2015. Details of source separation, cycle time and image quality. When does and doesn’t fast switching work

Yoshi

10:10-10:20

What about the calibrators? Searches and contributions

Anita

10:30-10:40

Multi frequency AGN survey with the KVN

Taehyun

10:40-10:50

COFFEE BREAK
10:50-11:10

Pushing bands 9 and 10 beyond 5 km configurations – ‘normal’
observing techniques

Ed

11:20-11:40

Testing phase referencing in marginal conditions – does very-fast
referencing really help

Yoshi – Ed

11:50-12:10

Diurnal properties of the long baseline phase statistics

Bill – Ed

12:00-13:00

Open Discussion Time
Wed 01/06 (Afternoon Session) Room HL 106
Astrometry
14:00-14:20

Astrometry results from the long baseline campaign – multi source observations for accurate astrometry

Antonio

14:30-15:00

Is this single test sufficient, further examination, astrometry runs, multi calibrators in science data

Ed – Antonio – Open discussion

15:00-15:20

Long term astrometry: Parallax studies, proper motions, planet/stellar wobbles – tests, feasibility, offered observation modes for LB?

Ed

15:20-15:30

COFFEE BREAK
15:30-15:50

Check sources for Astrometry

Ed

16:00-17:00

Open Discussion Time
Group Meal Evening — Belgisch Bier Cafe Olivier – 7 pm (Directions)

 

Thu 02/06 (Morning Session) Room HL 106
ALMA Long Baseline experience
10:00-10:20

Lessons Learned at LB (1)

Crystal (LINK)

10:30-10:50

Lessons Learned at LB (2)

Anita

11:00-10:20

The use of Check sources during the observations – What the QA2 current script does with check sources and plans for improvements

Todd (LINK)

11:20-11:40

COFFEE BREAK
11:40-12:40

Open Discussion Time
Thu 02/06 (Afternoon Session) Room HL 106
Higher Frequencies
14:00-14:20

ALMA Band-to-Band (B2B) tests attempts

Ed

14:30-14:50

Band 3 to Band 7 fast switching results

Yoshi

15:00-15:20

Dual frequency simulation using sub-arrays – Band 3 to 6 tests

Luke

15:20-15:40

COFFEE BREAK
15:40-16:00

ALMA High Frequency calibrator cone searches

Yanett – Carmen

16:10-17:30

Open Discussion Time

 

Fri 03/06 (Morning Session) Room HL 106
Summary and Future
09:30-10:00

Conference Summary

Remo

10:15-…

Open Session

 

PRESENTATIONS

Please, find the workshop presentations and summary in the password protected area (password notified by email, no username required):
Link to online presentations and presentations review.

 

LOGISTICS

The workshop is jointly organized by the ALMA observatory and Allegro, the Netherlands ARC node. It will be held at Leiden Observatory from May 30 – Jun 3. Participation is by invitation only.

-Accomodation
Hotel occupancy in Leiden is expected to be high for this period and you are urged to book early. A block reservation has been arranged at the IBIS hotel, opposite Leiden Centraal railway station: Link to Ibis hotel

This booking is held until 18/04/2016. After this date rooms that have not been reserved will be canceled. Workshop attendees receive a discounted price. Reservations need to be made via email to H8087-RE@accor.com mentioning the booking code STER280516:
o Single room incl. breakfast: €81.50 (€ 79 room plus € 2.50 tax per person/per day)
o Double room incl. breakfast: €97.00 (€92 room plus €2.50 tax per person/per day)

-Transportation
For those of you staying at the IBIS hotel situated adjacent from Leiden Centraal Station there will be taxis arranged to take you to the university and back each day. There will be enough space for ~15 people in total.

Leave Ibis Leave University
Monday

13:00

18:00
Tuesday

08:30

18:30
Wednesday

08:30

17:30
Thursday

09:30

17:30
Friday

09:00

12:30

As an alternative there are regular buses from the station, buses 43 (direction Den Haag) or bus 57 (direction Nieuw Vennep). These take around 7 minutes. Please see the link below for more specific details if you will be coming by bus.

Instructions on how to get to Leiden Observatory, including transportation from Schiphol Airport, can be found here:
http://www.lorentzcenter.nl/howto.php
And a site map can be found here:
http://www.lorentzcenter.nl/map_LC_hotels_stat_web.php

Note these specify the route to the Lorentz Center, which is in the forward leaning building in the photo. Leiden Observatory and Allegro are located on the 4th and 5th floor of that same building. Note that this is not the old Observatory in the center of Leiden. The workshop will be held on the First and Second floors of the joining building – The Huygens Building (HL) – in either rooms 204 or 106 (see directions below).

-Directions inside the building:

Room 106:
room_106

Room 204:
room_204

Allegro offices:
allegro_offices

-Remote participation:

WEBEX link for remote participation (only Mac and Windows OS):

https://meetings.webex.com/collabs/#/meetings/detail?uuid=M6YLWHU19C3ENKOPN2PJFMIJCE-EIHZ&rnd=692476.57822

This is be open every day of the meeting, you simply click and follow the instructions below (see also Webex_Getting_Started ).

Instructions:
– Use a Windows or Mac OsX computer (NOT Linux) and point the browser to the provided link.
Firefox works, but there are sporadic reports of Safari not working. To be safe, also quit
Skype before you start since under some conditions it can latch on the mic/speaker.

– After signing in (your name and an email address) click the large button on the left “Connect to Audio” –> “Call Using this Computer –>
(select correct audio devices –> be sure to hit “OK” (audio won’t work in meeting until you hit the “OK”). (See page 1 & 3 of the attached guide).

– If possible, use earphones with a microphone.

– Note there are tabs (upper left) for different pages, so check those first if you can not find your way.

– On the right there are buttons to open “Participants”, “Chat” etc. panels. If you make your window large enough it
is possible to have both panels open at the same time. Chat will work even when audio/video is not working
(assuming the person on the other end keeps an eye on it).

– The gear box above the video panel allows you to set the video source (it default for a mac to the camera
on the notebook display which may be closed and you’ll have to then set it to the camera on the external display.)

– The “audio” button below the participants list opens the audio selection/test panel.

-Conference dinner:
The evening meal will be on Wed 7 pm at the Belgisch Bier Cafe Olivier – Hooigracht 23, 2312 KM Leiden.
Find directions from Leiden Centraal station to the restaurant here:
MapToOliviers

And the menu here: Menu_Olivier_Eng

 

PARTICIPANTS

Name
Anita Richards
Richard Hills
Satoki Matsushita
Yoshiharu Asaki
Bill Dent
Ed Fomalont
Ray Blundell
Juan R. Pardo
George Bendo
Scott Paine
Dominique Broguiere
Taehyun Jung
Neil Phillips
Michael Bremer
Bojan Nikolic
Antonio Hales
Allegro

 

Requested remote participation (see instructions here):

Name
Crystal Bogan
Todd Hunter
Liz Humphreys
Alan Roy

 

ALMA Proposal Preparation Day 2016


Announcement from the Italian Node
11-12 April 2015 – Osservatorio di Radioastronomia Bologna, Italy

In preparation to the ALMA Cycle 4 proposal submission deadline of April 21st, the Italian node of the European ARC is organizing an “ALMA proposal preparation day” to support the ALMA users to prepare their proposals.

11-12th of April
This meeting will be held at the INAF-Osservatorio di Radioastronomia, Bologna, on the 11-12th of April.

During this meeting we will present short tutorials on the ALMA Observing Tool and on proposal preparation. Most of the time will be dedicated to the interaction of the participants with the ARC staff to get support in preparing their own proposals for ALMA Cycle 4.

Participants are invited to bring their own laptop to better participate in the interactive sessions and to directly work on proposal preparation. On request, few computers could be made available by the LOC.

Please notice that this activity is in addition to the usual “face-to-face” support that everybody can request at any time to the Italian ARC node via e-mail to help-desk@alma.inaf.it, or through the ALMA help-desk (register and access via the link “Helpdesk” on the ALMA Science Portal .

Contact:
Jan Brand
Coordinator European ALMA Regional Centre, Italian node
Email: brand@ira.inaf.it
Phone: +39 051 6399372

German ALMA Community Days 2016

Announcement from the German Node

To prepare the local astronomical community for Cycle 4, the German ARC node organizes the German ALMA Community Days 2016 at the Argelander-Institut für Astronomie in Bonn on 6-8 April 2016.

The next Call for Proposals for observing time with ALMA (Cycle 4) will be issued in March 2016. The deadline for proposals is expected to be on 21 April 2016, with observations starting in October 2016 (for more details, please see the pre-announcement in this newsletter). To prepare the local astronomical community for Cycle 4, the German ARC node organizes the German ALMA Community Days 2016 at the Argelander-Institut für Astronomie in Bonn on 6-8 April 2016. The first day will feature an introduction to the basic radio astronomical concepts and terminology for non-radio astronomers. The second day will be devoted to practical information on ALMA-related tools and procedures including a hands-on tutorial on the ALMA proposal tool. Participants are encouraged to stay for a third day (8 April) to start preparing their own ALMA proposals with technical support from ARC node staff. While this event is open to all ALMA users and prospective ALMA users, preference will be given to astronomers from the local community (Germany,
Austria, Switzerland).

More information will be posted by late January on the homepage of the German ARC node at https://www.astro.uni-bonn.de/ARC/

Contact
Dr. Stefanie Mühle
Universität Bonn
Argelander-Institut für Astronomie
European ALMA Regional Centre – German node
Auf dem Hügel 71
53121 Bonn
Germany
Phone: +49 (0)228 733662
Email: arc@astro.uni-bonn.de

Radio Interferometry: Methods and Science

Announcement from the German Node

The course “Radio Interferometry: Methods and Science”, held in English at the university of Bonn in April-July 2016, offers a hands-on overview of major aspects of radio/mm/submm interferometry for master students, PhD students and senior astronomers. The course also comprises hands-on tutorials, where participants learn how to reduce interferometric data with the widely used astronomical software packages AIPS and CASA.

The lectures start with a general introduction to radio interferometry and data reduction, followed by an overview of various fields of research and the special observing modes that they require, given by experts of the respective fields. The latest developments of selected world-leading radio/mm/submm interferometers will be presented as well.

Master students enrolled at the universities of Bonn and Cologne can take this course for credit. Other students and senior astronomers interested in the topic are very welcome to attend as well. We will offer remote access to the lectures and tutorials on a best efforts basis. Remote connections are in general possible to any European astronomical institutes, however, preference will be given to institutes from the local community (Germany, Austria, Switzerland). If you would like to follow the course from a remote location, please contact us before 1 April.

More information will be posted by late January on the homepage of the German ARC node at https://www.astro.uni-bonn.de/ARC/

Contact

Dr. Stefanie Mühle
Universität Bonn
Argelander-Institut für Astronomie
European ALMA Regional Centre – German node
Auf dem Hügel 71
53121 Bonn
Germany
Phone: +49 (0)228 733662
Email: arc@astro.uni-bonn.de

Picture
Credit: A. Sanchez-Monge

ALMA Cycle 3 workshops Mar-Apr 2015

The workshops to prepare for ALMA cycle 3 proposals will be divided between NOVA interest groups as follows:
Network 1 (Galaxies, cosmology): Groningen, April 1
Network 2 (Galaxy, star and planet formation): Amsterdam, March 10
Network 3 (Compact objects, black holes, neutron stars): Nijmegen, tbd

ALMA Cycle workshop and NL Submillimeter Day 20-21 June 2012

Joint ALMA Cycle 1 workshop and NL Submillimeter Day
Tuesday, 24 April 2012 15:58

We are happy to announce a two-day workshop on ALMA Cycle 1 scientific capabilities held jointly with a NL Submillimeter Day. The meeting will take place on Wednesday June 20 and Thursday June 21 at Leiden Observatory.

On the first day we will introduce the scientific capabilities for ALMA Cycle 1, which will run from January 1 2013 until November 2013, with a proposal deadline in mid July 2012. In the afternoon we will discuss (other) submillimeter developments in the Netherlands, and discuss future prospects.

On the second day, we will demonstrate the ALMA proposal preparation software, with an emphasis on the new capabilities compared to Cycle 0. This will be followed by a hands-on training using this software. The use of software to simulate ALMA observations of scientific targets will also be demonstrated.

CASA Cycle 0 PI Workshop 12-14 Dec 2011

Allegro organised a CASA Workshop from Monday, 12 Dec to Wednesday, 14 Dec 2011, which was dedicated to the PIs and co-Is of successful ALMA Cycle 0 proposals.

ALMA Early Science Cycle 0 Workshop

This workshop provided an overview of the Early Science call and a hands-on tutorial on the Observing Tool (OT) and CASA as well as help with proposal preparation for Cycle 0. See also this page for more information on the call for Early Science.
Workshop material

OT Download OT here
CASA Download CASA here
BIMA data set with CASA tutorial
simdata() material ftp://ftp.eso.org/pub/general/simdata
OST http://almaost.jb.man.ac.uk/
other FITS viewer/editor, for example Fv
CosmoCalc

 

Participants are asked to bring their own laptop for the hands-on sessions and to have the OT and CASA installed beforehand.Both OT and CASA can be downloaded for http://almascience.eso.org. Go to “Documents & Tools” –> “Tools” where you will find links to both OT and CASA.

In the hands-on session we will be working on a BIMA data set in CASA. The data set can be downloaded here (66MB).

For the ALMA simulator we will use a Spitzer image as a “sky model”. Download the FITS file here.
Logistics

See this page for detailed travel directions to Leiden observatory. The workshop will be held in rooms 207 (Wednesday 20) and 214 (Thursday 21) on the second floor of the Huygens building.

Coffee and Tea will be provided during the coffee breaks. Lunch is not included.
Final program

Wednesday, April 20

09:30 – 09:40 Welcome & logistics
09:40 – 10:40 Introduction to ALMA and Early Science (Martin Zwaan, ESO)
10:40 – 11:00 Coffee
11:00 – 12:00 Introduction to writing ALMA proposals + discussion (Michiel Hogerheijde, Allegro)
12:00 – 13:00 Lunch
13:00 – 13:40 Science tools (Floris van der Tak, SRON)
13:40 – 14:00 LIME and ARTIST (Christian Brinch, Allegro)
14:00 – 14:45 OT tutorial (Agnes Kospal, Allegro)
14:45 – 17:00 OT hands-on w/coffee

Thursday, April 21

09:00 – 10:00 Talks by participants (see below)
10:00 – 10:45 User support by Allegro during the early science phase + discussion (Michiel Hogerheijde, Allegro)
10:45 – 11:15 Coffee
11:15 – 12:15 The ALMA simulator (Eelco van Kampen, ESO)
12:15 – 13:15 Lunch
13:15 – 14:00 Introduction to CASA (Christian Brinch, Allegro)
14:00 – 16:00 How to simulate ALMA data, hands-on session (Various codes, from simple RADEX to complex radiative transfer and the CASA ‘simdata’ tool)

Talk by participants: Pamela Klaassen (Ionized and Molecular Gas Dynamics in Massive Star Forming Regions), Attila Juhasz (Testing planet formation theories with CO observations of transitional disks), Nienke van der Marel (Transitional disks), Edo Loenen (Spectral line imaging of nearby galaxies), Gergö Popping (Gas predictions of high redshift galaxies). 10 minutes each.