HTTP/1.0 401 Unauthorized Cache-Control: public Access-Control-Allow-Origin: * Vary: Authorization WWW-Authenticate: Digest realm="iri.columbia.edu", qop="auth", nonce="9e4bd5e908c422bfb0c687a1c5c35d8e", opaque="5ccc069c403ebaf9f0171e9517f40e41" Content-Type: text/html

401 Unauthorized

User/password is required.