ALMA Observation Support Tool
!!! Updated: Important
on OST simulation storage !!!
ALMA + ACA
ALMA Cycle 3 C36-1n (b_max= 160m)
ALMA Cycle 3 C36-1n + ACA Cycle 3
ALMA Cycle 3 C36-2n (b_max= 376m)
ALMA Cycle 3 C36-2n + ACA Cycle 3
ALMA Cycle 3 C36-3n (b_max= 538m)
ALMA Cycle 3 C36-3n + ACA Cycle 3
ALMA Cycle 3 C36-4n (b_max= 970m)
ALMA Cycle 3 C36-4n + ACA Cycle 3
ALMA Cycle 3 C36-5n (b_max= 1396m)
ALMA Cycle 3 C36-5n + ACA Cycle 3
ALMA Cycle 3 C36-6n (b_max= 2300m)
ALMA Cycle 3 C36-6n + ACA Cycle 3
ALMA Cycle 3 C36-7n (b_max= 6074m)
ALMA Cycle 3 C36-8n (b_max= 9743m)
ACA Cycle 3: 7m (Standard)
ALMA Cycle 2 C34-1 (b_max= 166m)
ALMA Cycle 2 C34-1 + ACA Cycle 2
ALMA Cycle 2 C34-2 (b_max= 304m)
ALMA Cycle 2 C34-2 + ACA Cycle 2
ALMA Cycle 2 C34-3 (b_max= 443m)
ALMA Cycle 2 C34-3 + ACA Cycle 2
ALMA Cycle 2 C34-4 (b_max= 558m)
ALMA Cycle 2 C34-4 + ACA Cycle 2
ALMA Cycle 2 C34-5 (b_max= 820m)
ALMA Cycle 2 C34-5 + ACA Cycle 2
ALMA Cycle 2 C34-6 (b_max= 1091m)
ALMA Cycle 2 C34-6 + ACA Cycle 2
ALMA Cycle 2 C34-7 (b_max= 1508m)
ALMA Cycle 2 C34-7 + ACA Cycle 2
ACA Cycle 2: 7m (Standard)
ACA Cycle 2: 7m-NS (Alternate)
Early Science ALMA (Compact Cycle 0)
Early Science ALMA (Extended Cycle 0)
ALMA Cycle 1 C32-1 (b_max= 146m)
ALMA Cycle 1 C32-1 + ACA Cycle 1
ALMA Cycle 1 C32-2 (b_max= 288m)
ALMA Cycle 1 C32-2 + ACA Cycle 1
ALMA Cycle 1 C32-3 (b_max= 442m)
ALMA Cycle 1 C32-3 + ACA Cycle 1
ALMA Cycle 1 C32-4 (b_max= 556m)
ALMA Cycle 1 C32-4 + ACA Cycle 1
ALMA Cycle 1 C32-5 (b_max= 818m)
ALMA Cycle 1 C32-6 (b_max=1055m)
ACA Cycle 1
Select the desired ALMA antenna configuration.
Uploaded FITS image
OST Library: Central point source
OST Library: NGC1333 at 8 kpc
OST Library: Protostellar Cluster
OST Library: Protoplanetary Disk
OST Library: Nova Model
OST Library: W49 in Leo T
OST Library: M51
OST Library: Watchmen logo
OST Library: 568ml
OST Library: Test cube 64x64x16
source model or supply your own.
You may upload your own model here (max 10MB).
Ensure correct formatting of this string (+/-00d00m00.0s).
Image peak / point flux in
Rescale the image data with respect to new peak value.
Set to 0.0 for no rescaling of source model.
Spectral or continuum observations?
Central frequency in GHz:
The value entered must be within an ALMA band.
Select the total bandwidth for continuum observations.
Enter 7.5 GHz to select ALMA recommend full continuum setup.
Use recommended continuum setup? :
Position spectral windows at the ALMA recommended positions for 7.5GHz bandwidth continuum observations.
Set the central frequency and bandwidth of each baseband/SPW in GHz.
SPWs can only be placed within the grey shaded areas.
They will be truncated in the simulation if not.
More SPWs (up to SPW3) will become avaiable as you increase the total bandwidth.
Channel width in
The width of channels to simulate.
Number of polarizations:
This affects the noise in the final map.
Required resolution in arcseconds:
OST will choose array config based on this value if
is set to ALMA.
Selecting single will apply primary beam attenuation.
On-source time in
Per pointing for mosaics.
Start hour angle:
Deviation of start of observation from transit.
Number of visits:
How many times the observation is repeated.
Include cycling to phase calibrator?:
This affects the
-coverage of your simulation.
The length of time between cutting to a phase calibrator.
Limited to either 0s or between 300s and 600s.
On Phase Cal. time:
The length of time spent observing phase calibrator (including slewing time).
Currently limited to either 0s or between 30s and 120s.
PWV = 0.472 mm (1st Octile)
PWV = 0.658 mm (2nd Octile)
PWV = 0.913 mm (3rd Octile)
PWV = 1.262 mm (4th Octile)
PWV = 1.796 mm (5th Octile)
PWV = 2.748 mm (6th Octile)
PWV = 5.186 mm (7th Octile)
Determines level of noise due to water vapour.
This allows a resolution / sensitivity trade-off.
No (Return dirty image)
Apply the CLEAN algorithm to deconvolve the image.
Output image format:
CASA format images are returned as a tar file
Your email address is