HTTP/1.0 401 Unauthorized Cache-Control: public Access-Control-Allow-Origin: * Vary: Authorization WWW-Authenticate: Digest realm="iri.columbia.edu", qop="auth", nonce="600c18893c63ed7270337e1969f40717", opaque="5ccc069c403ebaf9f0171e9517f40e41" Content-Type: text/html

401 Unauthorized

User/password is required.