Sort by column value. Download FITS. Color-Color plot and SED. Download FITS. Three color composite image. Color-Color diagram. SED. SED relative to R-band. (1). Searching for a cosmic string through the gravitational lens effect: Japanese Virtual Observatory science use case.
Color-Color plot and SED
Three color composite image
SED relative to R-band
Searching for a cosmic string through the gravitational lens effect: Japanese Virtual Observatory science use case
Y. Shirasaki１,4、Y. Mizumoto1、E. Matsuzaki2、M. Ohishi1、N. Yasuda1、M. Tanaka1、S. Honda1、
(1) NAOJ, (2) TITech, (3) University of Durham, (4) [email protected]
This poster describes a method to search for a cosmic string using its unique gravitational effect which produces aligned double images. Implementation of gravitational lens search to Japanese Virtual Observatory (JVO), which is aimed at the string search, is also presented
5. Gravitational lens search on JVO
This field sets a restriction for a color of R-B
JVO QL Editor generates a query and send it to a search engine. VOTable is an output format of the search engine and can be viewed by VOTable viewer.
Current version does not support morphological similarity check, so by constraining to a point like object and rejecting stellar-like color, 12 QSO GL candidates are obtained (Fig. 7).
Fig.2. Left: Assumed string configuration. Right: Detection limit of distance to a cosmic string as a function of observational condition (limiting magnitude).
4. Application to the observational data
We applied the method to the data of Subaru-XMM Deep Survey （SXDS). No candidates of string lens event were detected.
Fig.3. Left: Positional and directional distribution of the pair objects. Right: Degree of coherence.
Fig.1. Definition of parameters.