Now Dr. Brown has asked for an investigation of Dr. Ortiz's discovery, alleging a serious breach of scientific ethics. Archival records, he said, show that only a day before the discovery was reported, computers traced to Dr. Ortiz and his student Pablo Santos-Sanz visited a Web site containing data on where and when the Caltech group's telescope was pointed.

The information in these observing logs could have been used to help find the object on the Spanish images, taken more than two years ago, or simply to confirm that both groups discovered the same object. Depending on what the Spanish astronomers did, their failure to mention the Caltech observations could be considered scientific dishonesty or even fraud, Dr. Brown suggests.

http://www.nytimes.com/2005/09/13/science/space/13plan.html