Object Search Details

We suggest that all users read the FAQ and the Catalina Surveys data usage request before using this data.

Currently only CSS data is current available.
Additional data will be released in CSDR2.
For access to other Catalina data please contact us.

Input Parameters

The input format consists of the name of an astronomical object.
The Right Ascension and Declination values are derived by resolving
the name you provide using the CADC resolver. 
A radius can be specified in minutes of arc but defaults to 0.1
arcmins. The data returned is for all CSS objects within the radius 
range of the input coordinates.


Photcat contains all the photometry for the frames that match objects 
in the master frames. This contains the associated master object and 
master frame ID. This also contains a flag to say whether the measurement 
vary WRT the magnitude if the object in the master frame (TVAR).
Ophancat contains the detections that are covered by the master frame 
area but do not match sources detected in the master frames.


The output of the query is returned to either a webpage (html), a
comma separated ascii file (csv), or the IVOA standard VOTable.
Webpage output is limited to the short output format and number
3000 lines. Other formats are limited to 20,000 lines.



Two separate output formats are available, long and short. The short format 
consists of Magnitude, the uncertainty in magitude, the Modified Julian Date, 
the decimal RA and Decination of each detection. The long format includes are 
number of additional parameters including FWHM, exposure time, 
airmass, etc.


Plots of the lightcurves can be display and manipulated for a limited
sample of objects.

The Data Product

This service is solely provided for the investigation astronomical 
sources monitored CSS project and is provided by CRTS.
The service provides source photometry derived from the SExtractor
photometry package. CSS images are all taken unfiltered.
Magnitudes provide here are in V-band. Rough transformation and 
photometric calibration is based on a few 10's to 100's stars within 
each frame. Contact CRTS members for further details to photometry.