We present examples of accessing the KASI Virtual Observatory (VO) Simple Image Access (SIA) services. Currently, SIA is available for the MIRIS (Multipurpose IR Imaging System; http://miris.kasi.re.kr/miris/) dataset.
| Dataset | Access URL |
|---|---|
| MIRIS | https://data.kasi.re.kr/vo/api/miris/sia_v1 |
Python VO clients
As an example, the following shows how to access the MIRIS SIA service by using Python package PyVO (https://github.com/astropy/pyvo). See how to use its SIA modules in https://pyvo.readthedocs.io/en/latest/dal/index.html#simple-image-access .
import pyvo as vo
import astropy
pos = astropy.coordinates.SkyCoord(84.0, -70.0, unit='deg') # search position
size = astropy.coordinates.Angle(1.0, unit='deg') # search radius
sia_service = vo.dal.SIAService('https://data.kasi.re.kr/vo/api/miris/sia_v1') # SIA API
sia_results = sia_service.search(pos=pos, size=size) # search results in the format of https://pyvo.readthedocs.io/en/latest/api/pyvo.dal.SIAResults.html#pyvo.dal.SIAResults
sia_results
<Table length=11>
dataproduct_type obs_collection target_name s_ra s_dec Dim Bandpass Format Url
deg deg
object object object float64 float64 int32 object object object
---------------- -------------- ----------- --------- ---------- ----- -------- ---------- ---------------------------------------------------------
image MIRIS LMC a 84.083792 -70.450578 2 PAAL image/fits https://archive.kasi.re.kr/miris/201410/MS1412446136.fits
image MIRIS LMC a 84.086609 -70.454108 2 PAAL image/fits https://archive.kasi.re.kr/miris/201410/MS1413312122.fits
image MIRIS LMC a 84.069085 -70.455493 2 PAAC image/fits https://archive.kasi.re.kr/miris/201410/MS1413358623.fits
image MIRIS LMC a 84.08105 -70.460115 2 PAAL image/fits https://archive.kasi.re.kr/miris/201410/MS1413317934.fits
image MIRIS LMC a 84.095598 -70.460426 2 PAAC image/fits https://archive.kasi.re.kr/miris/201410/MS1412451951.fits
image MIRIS LMC a 84.049578 -70.461393 2 PAAL image/fits https://archive.kasi.re.kr/miris/201410/MS1412440324.fits
image MIRIS LMC a 84.107628 -70.461639 2 PAAL image/fits https://archive.kasi.re.kr/miris/201410/MS1412434511.fits
image MIRIS LMC a 84.095563 -70.462757 2 PAAC image/fits https://archive.kasi.re.kr/miris/201410/MS1412498451.fits
image MIRIS LMC a 84.091313 -70.463528 2 PAAC image/fits https://archive.kasi.re.kr/miris/201410/MS1413364435.fits
image MIRIS LMC a 84.103507 -70.463404 2 I image/fits https://archive.kasi.re.kr/miris/201410/MS1412504257.fits
image MIRIS LMC a 84.117384 -70.46529 2 PAAC image/fits https://archive.kasi.re.kr/miris/201410/MS1412492638.fits
sia_results[0]
('image', 'MIRIS', 'LMC a', 84.083792, -70.450578, 2, 'PAAL', 'image/fits', 'https://archive.kasi.re.kr/miris/201410/MS1412446136.fits')
sia_results[0]['Url']
'https://archive.kasi.re.kr/miris/201410/MS1412446136.fits'
img_file = astropy.utils.data.download_file(sia_results[0]['Url'], cache=True)
Downloading https://archive.kasi.re.kr/miris/201410/MS1412446136.fits
|===================================================================================================================| 1.2M/1.2M (100.00%) 0s
img_data = astropy.io.fits.getdata(img_file)
Aladin as VO client
The KASI SIA service is not included as one of default services in the Aladin (https://aladin.cds.unistra.fr/). However, you can use Aladin's generic service menu.
Topcat as VO client
Topcat (https://www.star.bris.ac.uk/~mbt/topcat/) can be used as a VO client, which can access the KASI SIA services. Click VO → Simple Image Access (SIA) Query.
As shown above, type the SIA URL and search with a center position and a search radius. The Topcat generate a new table as the query results.