{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2002:6Z7VL72KVJY6KS4C37GMN7O3J6","short_pith_number":"pith:6Z7VL72K","canonical_record":{"source":{"id":"astro-ph/0201449","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2002-01-28T17:04:02Z","cross_cats_sorted":[],"title_canon_sha256":"b0c7ce3f2178a82dafbdaa8ea61f84c0caee3181a2417552ad14622e63ccb1a6","abstract_canon_sha256":"32c97f5b9ba7aad9d490aaedf5536fa491a6d13f60369eb572911dbfa4a3b360"},"schema_version":"1.0"},"canonical_sha256":"f67f55ff4aaa71e54b82dfccc6fddb4fa6525054904180f40df32c60f4c3f4a6","source":{"kind":"arxiv","id":"astro-ph/0201449","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0201449","created_at":"2026-07-04T16:29:19Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0201449v1","created_at":"2026-07-04T16:29:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0201449","created_at":"2026-07-04T16:29:19Z"},{"alias_kind":"pith_short_12","alias_value":"6Z7VL72KVJY6","created_at":"2026-07-04T16:29:19Z"},{"alias_kind":"pith_short_16","alias_value":"6Z7VL72KVJY6KS4C","created_at":"2026-07-04T16:29:19Z"},{"alias_kind":"pith_short_8","alias_value":"6Z7VL72K","created_at":"2026-07-04T16:29:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2002:6Z7VL72KVJY6KS4C37GMN7O3J6","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0201449","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2002-01-28T17:04:02Z","cross_cats_sorted":[],"title_canon_sha256":"b0c7ce3f2178a82dafbdaa8ea61f84c0caee3181a2417552ad14622e63ccb1a6","abstract_canon_sha256":"32c97f5b9ba7aad9d490aaedf5536fa491a6d13f60369eb572911dbfa4a3b360"},"schema_version":"1.0"},"canonical_sha256":"f67f55ff4aaa71e54b82dfccc6fddb4fa6525054904180f40df32c60f4c3f4a6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:29:19.148304Z","signature_b64":"I7UTjLu/Xf+E8NyLNAMAAgb3vu2cqrC/UDrH+m3aQx9R0VJa1KAtKNJ28bHl9YVbaf/tsYcCkckmD6z68FUYBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f67f55ff4aaa71e54b82dfccc6fddb4fa6525054904180f40df32c60f4c3f4a6","last_reissued_at":"2026-07-04T16:29:19.147819Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:29:19.147819Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0201449","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T16:29:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zTLwKFw2WsInrYfaV+NT7Dq56/59m3A37m9Xyb9GoF8zSDtIdGAnikK7GVdyxEHOG5x5r7BwJvfs3GOp72iaBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T20:45:47.841781Z"},"content_sha256":"017929c7e989ba18bcb83a16028ec677b96a61e7c16ade8a9a8e1050ebbd70e9","schema_version":"1.0","event_id":"sha256:017929c7e989ba18bcb83a16028ec677b96a61e7c16ade8a9a8e1050ebbd70e9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2002:6Z7VL72KVJY6KS4C37GMN7O3J6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Water maser emission in IC342","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A.B. Peck, A. Tarchi, C. Henkel, K.M. Menten","submitted_at":"2002-01-28T17:04:02Z","abstract_excerpt":"The detection of 22 GHz water vapor emission from IC342 is reported, raising the detection rate among northern galaxies with 100 micron IRAS point source fluxes > 50 Jy to 16%. The maser, associated with a star forming region 10-15 arcsec west of the nucleus, consists of a single 0.5 km/s wide feature and reaches an isotropic luminosity of 0.01 solar luminosity (D = 1.8 Mpc). If the time variability is intrinsic, the maser size is < 1.5 x 10^(16) cm (< 0.5 mas) which corresponds to a brightness temperature of > 10^(9) K. The linewidth, luminosity, and rapid variability are reminiscent of the 8"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0201449","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0201449/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T16:29:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"R6Y+JSZ3ndfMWqmtE2tVM4+M9PVGjy8Btdeov6D2HAV+lSijLeNXKvsXcdCwOCj02rVpZ+2aRHr+X8hk3J+UBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T20:45:47.842656Z"},"content_sha256":"0e14a0d3805be59530c51fc04c7314b395c7a0d0a47381abd88351e5d3b1d346","schema_version":"1.0","event_id":"sha256:0e14a0d3805be59530c51fc04c7314b395c7a0d0a47381abd88351e5d3b1d346"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6Z7VL72KVJY6KS4C37GMN7O3J6/bundle.json","state_url":"https://pith.science/pith/6Z7VL72KVJY6KS4C37GMN7O3J6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6Z7VL72KVJY6KS4C37GMN7O3J6/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-22T20:45:47Z","links":{"resolver":"https://pith.science/pith/6Z7VL72KVJY6KS4C37GMN7O3J6","bundle":"https://pith.science/pith/6Z7VL72KVJY6KS4C37GMN7O3J6/bundle.json","state":"https://pith.science/pith/6Z7VL72KVJY6KS4C37GMN7O3J6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6Z7VL72KVJY6KS4C37GMN7O3J6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:6Z7VL72KVJY6KS4C37GMN7O3J6","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"32c97f5b9ba7aad9d490aaedf5536fa491a6d13f60369eb572911dbfa4a3b360","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-01-28T17:04:02Z","title_canon_sha256":"b0c7ce3f2178a82dafbdaa8ea61f84c0caee3181a2417552ad14622e63ccb1a6"},"schema_version":"1.0","source":{"id":"astro-ph/0201449","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0201449","created_at":"2026-07-04T16:29:19Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0201449v1","created_at":"2026-07-04T16:29:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0201449","created_at":"2026-07-04T16:29:19Z"},{"alias_kind":"pith_short_12","alias_value":"6Z7VL72KVJY6","created_at":"2026-07-04T16:29:19Z"},{"alias_kind":"pith_short_16","alias_value":"6Z7VL72KVJY6KS4C","created_at":"2026-07-04T16:29:19Z"},{"alias_kind":"pith_short_8","alias_value":"6Z7VL72K","created_at":"2026-07-04T16:29:19Z"}],"graph_snapshots":[{"event_id":"sha256:0e14a0d3805be59530c51fc04c7314b395c7a0d0a47381abd88351e5d3b1d346","target":"graph","created_at":"2026-07-04T16:29:19Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/astro-ph/0201449/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The detection of 22 GHz water vapor emission from IC342 is reported, raising the detection rate among northern galaxies with 100 micron IRAS point source fluxes > 50 Jy to 16%. The maser, associated with a star forming region 10-15 arcsec west of the nucleus, consists of a single 0.5 km/s wide feature and reaches an isotropic luminosity of 0.01 solar luminosity (D = 1.8 Mpc). If the time variability is intrinsic, the maser size is < 1.5 x 10^(16) cm (< 0.5 mas) which corresponds to a brightness temperature of > 10^(9) K. The linewidth, luminosity, and rapid variability are reminiscent of the 8","authors_text":"A.B. Peck, A. Tarchi, C. Henkel, K.M. Menten","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2002-01-28T17:04:02Z","title":"Water maser emission in IC342"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0201449","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:017929c7e989ba18bcb83a16028ec677b96a61e7c16ade8a9a8e1050ebbd70e9","target":"record","created_at":"2026-07-04T16:29:19Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"32c97f5b9ba7aad9d490aaedf5536fa491a6d13f60369eb572911dbfa4a3b360","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-01-28T17:04:02Z","title_canon_sha256":"b0c7ce3f2178a82dafbdaa8ea61f84c0caee3181a2417552ad14622e63ccb1a6"},"schema_version":"1.0","source":{"id":"astro-ph/0201449","kind":"arxiv","version":1}},"canonical_sha256":"f67f55ff4aaa71e54b82dfccc6fddb4fa6525054904180f40df32c60f4c3f4a6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f67f55ff4aaa71e54b82dfccc6fddb4fa6525054904180f40df32c60f4c3f4a6","first_computed_at":"2026-07-04T16:29:19.147819Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:29:19.147819Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"I7UTjLu/Xf+E8NyLNAMAAgb3vu2cqrC/UDrH+m3aQx9R0VJa1KAtKNJ28bHl9YVbaf/tsYcCkckmD6z68FUYBQ==","signature_status":"signed_v1","signed_at":"2026-07-04T16:29:19.148304Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0201449","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:017929c7e989ba18bcb83a16028ec677b96a61e7c16ade8a9a8e1050ebbd70e9","sha256:0e14a0d3805be59530c51fc04c7314b395c7a0d0a47381abd88351e5d3b1d346"],"state_sha256":"13b2dcafe9a0ddfabab6d119bd9c8a3a7e9838ee1e7d4c586849823667c1452d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2tJ662l6rKXytIMD/iVswbrRBqt1CZNQs7YMxFCQly9iE5gQKOy8/9bK/tGRKzWWUa8o5hUJIY6h4WYLgaEFCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-22T20:45:47.846990Z","bundle_sha256":"959ee9f9d8db695d38481f8500f7b7f0caae27ec5e2d7b244da9938db7d34f73"}}