Tulsa's Defcon brings an assortment of comic-book creators, actors and comic-book dealers to the Tulsa Convention Center, 100 Civic Center, starting at noon today. The convention runs until 5 p.m. Sunday with events planned 24 hours a day. It's the first 24-hour convention the organizers have attempted. "Trying to stay up for most of it will be the most challenging thing,” Defcon chairman Jimmy Jarman said. Jarman said the convention had run 24-hour movie rooms before, but this year raves, bands, films and other events will be held deep into the night and early morning. Jarman said this will make the event easier to enjoy for those who have to work on one of the days of the convention. "This way, they can come out in the evening and still have plenty of events to do throughout the night,” he said. In addition to late-night activities, there will be plenty of dealers and guests. "Star Wars” fans can meet Peter Mayhew, the actor who portrayed Chewbacca. The creator of "The Crow,” writer-artist James O'Barr, is scheduled to appear at Defcon. Lady Death's creator, Brian Pulido, recently was added to the guest list, Jarman said. Michael Golden, who came to prominence in the 1980s as the artist of the "Micronauts” series, also will attend. A "40 Years of Ghost Rider” panel is scheduled for 4 p.m. Saturday, with current writer Jason Aaron, 1990s and 2000s artists Mark Texeira and Javier Saltares, and co-creator Gary Friedrich. For the full event schedule, go online to www.myspace. com/tulsadefcon.