The KASI Virtual Observatory (VO) is now providing the following Simple Cone Search (SCS) service.
| StarDB NSVS (Northern Sky Variability Survey) analysis (see Shin et al. 2009 and 2012) | https://data.kasi.re.kr/vo/stardb/NSVS/conesearch/nsvs_conesearch.php? |
Python VO clients
The Python package PyVO (https://github.com/astropy/pyvo) has a SCS API. Here, we show an example of searching with the query position and radius.
>>> import pyvo as vo
>>> import astropy
>>> pos = astropy.coordinates.SkyCoord(264.60510, 82.02125, unit='deg') # search position
>>> size = astropy.coordinates.Angle(0.2, unit='deg') # search radius
>>> scs_service = vo.dal.SCSService('https://data.kasi.re.kr/vo/stardb/NSVS/conesearch/nsvs_conesearch.php')
>>> scs_results = scs_service.search(pos=pos, radius=size)
>>> scs_results
<Table length=14>
unique_id field_name ra dec median_ROTSE_mag mag_scatter ... 2MASS_distance SDSS_id SDSS_distance GALEX_id GALEX_distance
deg deg mag. mag. ...
object object float64 float64 float32 float32 ... object object object object object
--------- ---------- --------- -------- ---------------- ----------- ... -------------- ------- ------------- ------------------- --------------
1151 001a 264.6051 82.02125 13.093 0.064 ... 5.909 6371654668106335077 5.11459
1277 001a 264.63221 82.07389 11.386 0.025 ... 2.134 6371654667032595033 2.54214
25171 001b 264.63345 82.07388 11.36 0.023 ... 2.003 6371654667032595033 2.31692
1119964 009d 264.55992 82.03985 15.1 0.174 ... 1.066
1119981 009d 264.63075 82.07372 11.309 0.022 ... 3.015 6371654667032595033 3.45517
1119995 009d 264.59213 82.02129 13.029 0.043 ... 1.477 6371654668106335077 1.78075
1120006 009d 264.77935 82.11691 15.015 0.175 ... 0.884 6371654667030498301 0.236268
1120093 009d 264.66477 81.94344 14.603 0.149 ...
1120124 009d 264.61965 81.86993 14.618 0.151 ... 3.621 6371654667030497215 1.8554
1120144 009d 264.58116 81.83021 14.342 0.142 ... 1.239 6371654667030497016 1.81024
1163808 010a 264.62096 81.86985 14.638 0.142 ... 3.728 6371654667030497215 2.53741
1163933 010a 264.66695 81.9436 14.619 0.137 ...
1164010 010a 264.59433 82.0211 13.068 0.048 ... 0.747 6371654668106335077 0.496495
1164102 010a 264.63125 82.07371 11.344 0.021 ... 2.924 6371654667032595033 3.34426
>>>
Aladin interface
A well-known tool Aladin (https://aladin.cds.unistra.fr/) also supports SCS query, and it can visualize the query results with other images. When clicking File → Open Server Selector → VO → Generic Cone Search query, the following window appears.
Here, we search the NSVS SCS (https://data.kasi.re.kr/vo/stardb/NSVS/conesearch/nsvs_conesearch.php?) with a search position and radius.
In the above example, you can see the query results from the NSVS CSC service as well as Pan-STARRS DR1 y-band image together.
Topcat interface
In Topcat (https://www.star.bris.ac.uk/~mbt/topcat/), select VO → Cone Search to have the following window. You have to type a valid KASI SCS url as shown below.
Search results will be given in a new table.