A judge ordered a Lawrence man held without bail following a fatal shooting outside a house party in the city last weekend. Authorities charged Ismael Calixto with murder and weapons offenses, and the 18-year-old appeared Tuesday in Lawrence District Court for arraignment. His lawyer could not immediately be reached for comment after court. Police said Calixto shot Richard Bonilla, 18, of Lowell, at about 1 a.m. Sunday. Bonilla was flown to a Boston hospital, where he died of his wounds. Police think gunfire erupted after a verbal altercation outside the party.