CASDA Skymap Search
Overview | CASDA Skymap Search | Catalogue Summary | Popup summary | Aladin-Lite
Overview
The complete CASDA User Guide can be found at http://www.atnf.csiro.au/observers/data/casdaguide.html and covers alternate access methods such as Virtual Observatory tools and scripted/automated access.
This search facility allows users to search for Australian Square Kilometer Array Pathfinder (ASKAP) data taken from the facility in Western Australia, using an interactive Aladin-Lite sky map.
CASDA Skymap Search
To conduct a Skymap search:
- Use the “Target” to select a location using object name or co-ordinates.
- Select a “Survey” to display all catalogues in that survey. These are indicated on the Skymap with a red square.
Click the
icon to see a description of each Survey. - The selection of a red square is indicated by a green square. Note: this functionality may not be available in Internet Explorer – please try Chrome or FireFox.
- Once a selection is made the details are displayed below the Skymap. The details will depend on the selected catalogue.
- Image(s) relevant to the catalogue will be displayed in the thumbnail where available. Initial image loading may take a while, but images are cached so reloads will be quick.
Target
The default position is 2MASX J08161181-7039447. Enter an Object Name or RA and Dec to re-centre the view.
Surveys
The following are the Item Details and their associated Units for each Survey
RACS DR1 Galactic Region & ACS DR1 Non Galactic Region
| Item Details | Units |
|---|---|
| Source Name | n/a |
| RA (J200) | deg |
| Dec (J200) | deg |
| Integrated Flux Density | mJy |
| Peak Flux Density | mJy/beam |
| Major Axis | arcsec |
| Minor Axis | arcsec |
| Position Angle | deg |
SPICE-RACS DR1 cubelets
| Item Details | Units |
|---|---|
| Source Name | n/a |
| RA (J200) | deg |
| Dec (J200) | deg |
| Integrated Flux Density | mJy |
| Peak Flux Density | mJy/beam |
| Major Axis | arcsec |
| Minor Axis | arcsec |
| Position Angle | deg |
SPICE-RACS DR1 spectra
| Item Details | Units |
|---|---|
| Source Catalog ID | n/a |
| RA (ICRS) | deg |
| Dec (ICRS) | deg |
| Stokes I Flux Density | Jy.beam-1 |
| Stokes I Flux Density Error | Jy.beam-1 |
| Polarized Intensity | Jy.beam-1 |
| Polarized Intensity Error | Jy.beam-1 |
| Fractional Polarization | n/a |
| SNR Pol Intensity | n/a |
| Rotation Measure | rad.m-2 |
| Rotation Measure Error | rad.m-2 |
| De-rotated Polarization | deg |
| De-rotated Polarization Error | deg |
| RM Width | rad.m-2 |
| Sigma_add Complexity | n/a |
| Sigma_add Complexity Error | n/a |
| Instrumental Leakage Estimate | n/a |
WALLABY Pilot DR1
| Item Details | Units |
|---|---|
| Source Name | n/a |
| Right Ascension (J2000) | deg |
| Declination (J2000) | deg |
| Centroid Frequency | Hx |
| Integrated Flux | Jy*Hz |
| Spectral Line Width | Hz |
Item Summary
Select “View item summary” to open a new tab with the Catalogue Summary. The summary provides details of catalogues for all data products available for the source.
Click “Download source files” to access associated source files (you must be logged in).
Parent Image
Select “View parent image” to view a popup summary with details of the parent image.
Catalogue Summary
To view the catalogue summary, select “View item summary” after selecting a source on the CASDA Skymap Search. The summary contains details about the available catalogues for all Catalogue Types for the selected source.
Click “Download source files” to access associated source files (you must be logged in).
Popup summary
The popup summary is a summary of the file selected on the CASDA Observation Search Results or the CASDA Skymap Search.
The display depends on the type of data product. See CASDA Image Cube Summary for an example of an Image Cube file.
Aladin-Lite
Coordinates
J2000 (default) or Galactic.
Base image layer
default is the Rapid ASKAP Continuum Epoch Survey 1 Low Stokes I ( 887.5 MHz). Users can select from other available options.
Overlay layers
- Reticle – default is checked to display the centre point of the view. Users can uncheck to not display.
- HEALPix grid – default is unchecked. Users can check to display the grid.
Navigation
- Pan – Use the mouse to move the view.
- Zoom – Use the + and – buttons on the right side, or the mouse wheel, to move in or out. Default Field of View is 2 degrees.
- Full screen – use arrows in top right of screen to open and close a full screen view.