Version 1.2 (ALMA Cycle 1)
Array
Instrument
------------Cycle 1------------
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
-------------Full ALMA-------------
ALMA
ACA
ALMA + ACA
-------------Cycle 0--------------
Early Science ALMA (Compact Cycle 0)
Early Science ALMA (Extended Cycle 0)
Queue Status
Help
ALMA Helpdesk
OST Latest News
Sky Setup
Source model
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: Watchmen logo
OST Library: 568ml
Choose a
library
source model or supply your own
Upload a FITS file
You may upload your own model here (max 10MB)
Declination
Ensure correct formatting of this string (+/-00d00m00.0s)
Image peak / point flux in
Jy
mJy
uJy
Set to 0.0 for no rescaling of source model
Observation Setup
Central frequency in GHz
The value entered must be within an ALMA band
Bandwidth in
GHz
MHz
kHz
Use broad for continuum, narrow for single channel
Required resolution in arcseconds
OST will choose config if instrument is set to ALMA
Pointing strategy
Single
Mosaic
Selecting single will apply primary beam attenuation
Start hour angle
Deviation of start of observation from transit
Phase Cycle in
seconds
The length of time between cutting to a phase calibrator
(currently limited to either 0s
or
between 300s and 600s)
On Phase Calibrator in
seconds
The length of time spent observing phase calibrator
(currently limited to either 0s
or
between 30s and 600s)
On-source time in
seconds
minutes
hours
Per pointing for Mosaics.
Number of visits
How many times the observation is repeated
Number of polarizations
1
2
This affects the noise in the final map
Corruption
Atmospheric conditions
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
Imaging
Imaging weights
Uniform
Natural
Briggs
This allows a resolution / sensitivity trade-off
Perform deconvolution?
No (Return dirty image)
Yes
Apply the CLEAN algorithm to deconvolve the image
Output image format
FITS
CASA
CASA format images are returned as a tar file
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