In this sub-catalogue we provide information about 172163 sources detected in the infrared but not in the optical/ultraviolet range.
If you use this service in your research, please include the following acknowledgement in any resulting publications:
"Based on data from the SVO archive of vanishing objects in POSS I red images . The archive has been developed in the framework of the Spanish Virtual Observatory (https://svo.cab.inta-csic.es) project funded by MCIN/AEI/10.13039/501100011033/ through grant PID2020-112949GB-I00. The system is maintained by the Data Archive Unit of the CAB (CSIC -INTA)".