Sidebar
Table of Contents
v547d
| Description | 3D Kinematics in G339.884-1.259 at 10 to 1000 AU Scales |
|---|---|
| Antennas | At-Cd-Ho-Mp-Pa |
| Start | 37 14:30:00 |
| Stop | 38 05:00:00 |
| PI | V. Krishnan |
Setup v547d.1cm:
| Station Modes | At Mp Pa |
|---|---|
| Channel 1 | IFP#1-LO 22230 - 22246 MHz USB RCP |
| Channel 2 | IFP#1-HI 22246 - 22262 MHz USB RCP |
| Channel 3 | IFP#2-LO 22230 - 22246 MHz USB LCP |
| Channel 4 | IFP#2-HI 22246 - 22262 MHz USB LCP |
| DAS 1 Skyfreq | 22246 MHz |
| Bandwidth | 16 MHz |
| DAS Mode | vsop.pro (telescope) |
| Station Modes | Cd |
|---|---|
| Channel 1 | 22230 - 22246 MHz USB RCP |
| Channel 2 | 22230 - 22246 MHz USB LCP |
| Channel 3 | 22246 - 22262 MHz USB RCP |
| Channel 4 | 22246 - 22262 MHz USB LCP |
| Bandwidth | 16 MHz |
| DAS Mode | Mark5 |
| Station Modes | Ho |
|---|---|
| Channel 1 | 22230 - 22246 MHz USB RCP |
| Channel 2 | 22230 - 22246 MHz USB LCP |
| Channel 3 | 22246 - 22262 MHz USB RCP |
| Channel 4 | 22246 - 22262 MHz USB LCP |
| Bandwidth | 16 MHz |
| DAS Mode | Mark5 |
Ftp: ftp://ftp.atnf.csiro.au/pub/people/vlbi/v547/v547d
Comments:
Break down of the schedule:
! 14:30 - 15:30 Fringe check (3C273)
! 15:30 - 17:50 G339.884-1.259
! 17:50 - 18:01 Find fringe (3C273)
! 18:01 - 20:22 G339.884-1.259
! 20:22 - 20:45 Find fringe & polarisation scan (1921-293 & 1934-638)
! 20:45 - 22:57 G339.884-1.259
! 22:57 - 23:29 Find fringe & polarisation scan (1921-293 & 1934-638)
! 23:29 - 01:44 G339.884-1.259
! 01:44 - 02:06 Find fringe & polarisation scan (1921-293 & 1934-638)
! 02:06 - 03:07 G339.884-1.259
! 03:07 - 03:30 Find fringe & polarisation scan (1921-293 & 1934-638)
! 03:30 - 04:47 G339.884-1.259
! 04:47 - 04:00 Find fringe & polarisation scan (1921-293 & 1934-638)
The observing requirements for v547d are essentially identical to v547c (http://www.atnf.csiro.au/vlbi/dokuwiki/doku.php/lbaops/lbajun2017/v547c).
The aim of our project is to conduct astrometric observations of the 22 GHz water masers in G339.884-1.259 to sub-milliarcsecond accuracy. We will be phase referencing this source with respect to J1706-4600 to determine the absolute proper motions of the maser features to probe the 3D gas dynamics at scales of 10 to 1000 AU to understand the outflow structure of this source.
Phase referencing observations will be interspersed with scans on PKS1934-638 for D-term leakage for polarisation measurements. Unlike the previous two sessions, we will not be employing the geodetic block segments, thereby streamlining the observation requirements.
Maser emission for G339.884-1.259 is at approximately 22,239.56 MHz.
Observing comments for each antenna:
Hobart, Ceduna:
The 4 x 16 MHz bandpass setup requires feeding two separate LOs into IFP#1 and #2 on the DAS/frequency translator.
bbc01d is for single frequency (467 MHz)
ATCA:
Please, phase-up antennas CA01 through CA05 for this experiment. During phase-referencing have scheduled regular 3m scans (including slew time with a frequency of ~15 mins) of 1646-50 to re-phase the array.
Parkes:
There will be no observations between UT 15:35 - 16:54 and UT 03:30 - 04:39 because G339.884-1.2 will be set.
In v547a and v547b, when we had the ICRF blocks, we had to change the DAS profile and attenuation manually, but will not be necessary now: http://www.atnf.csiro.au/vlbi/dokuwiki/doku.php/lbaops/lbaoct2016/v547a http://www.atnf.csiro.au/vlbi/dokuwiki/doku.php/lbaops/lbamar2017/v547b
Observing comments for each antenna:
Observing Logs
ATCA antenna summary
Parkes onsource flagging
ATCA onsource flagging
Mopra onsource flagging
Mopra Tsys
(plot)
Parkes Tsys
Weather
Monica log information
