{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2000:P3WLDW4XXGYRM6GB6ZCKEZFF3H","short_pith_number":"pith:P3WLDW4X","canonical_record":{"source":{"id":"astro-ph/0010075","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2000-10-03T23:06:12Z","cross_cats_sorted":[],"title_canon_sha256":"d5b790a728a1c66dee85714c9e182b0b8f021c8c505dca5c574b30e9d0be237a","abstract_canon_sha256":"fb6300acfdb77c4333e8559b89a42b7b323f49db910b9ee6786f5231a33c0336"},"schema_version":"1.0"},"canonical_sha256":"7eecb1db97b9b11678c1f644a264a5d9e98dc05635caa71c929ef8aacc3e0efa","source":{"kind":"arxiv","id":"astro-ph/0010075","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0010075","created_at":"2026-07-04T16:17:14Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0010075v2","created_at":"2026-07-04T16:17:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0010075","created_at":"2026-07-04T16:17:14Z"},{"alias_kind":"pith_short_12","alias_value":"P3WLDW4XXGYR","created_at":"2026-07-04T16:17:14Z"},{"alias_kind":"pith_short_16","alias_value":"P3WLDW4XXGYRM6GB","created_at":"2026-07-04T16:17:14Z"},{"alias_kind":"pith_short_8","alias_value":"P3WLDW4X","created_at":"2026-07-04T16:17:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2000:P3WLDW4XXGYRM6GB6ZCKEZFF3H","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0010075","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2000-10-03T23:06:12Z","cross_cats_sorted":[],"title_canon_sha256":"d5b790a728a1c66dee85714c9e182b0b8f021c8c505dca5c574b30e9d0be237a","abstract_canon_sha256":"fb6300acfdb77c4333e8559b89a42b7b323f49db910b9ee6786f5231a33c0336"},"schema_version":"1.0"},"canonical_sha256":"7eecb1db97b9b11678c1f644a264a5d9e98dc05635caa71c929ef8aacc3e0efa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:17:14.445322Z","signature_b64":"vB/qLPbHzDFNY5BvWOlKwNxwXd/gH/ba0N/K3IItl4qLVwM/Q0rW9RoOv/thGPdSWbBrqfpgDzJQbRrRKS8pDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7eecb1db97b9b11678c1f644a264a5d9e98dc05635caa71c929ef8aacc3e0efa","last_reissued_at":"2026-07-04T16:17:14.444911Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:17:14.444911Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0010075","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T16:17:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3jPmOJtN6HXkZSvRjN9Fhp3JFQRM9MubWq+hSCX+dntk2ZC55b5YCRwTbuGNM/XjQDy9s6Nm5uK3AZJwBmAdCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T22:33:39.442090Z"},"content_sha256":"fc6813560318eba17e7029f68092d195df702a58b3a96d756e5ec051aa0a1b6e","schema_version":"1.0","event_id":"sha256:fc6813560318eba17e7029f68092d195df702a58b3a96d756e5ec051aa0a1b6e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2000:P3WLDW4XXGYRM6GB6ZCKEZFF3H","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"HI Observations of Giant Low Surface Brightness Galaxies","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"D. Monnier-Ragaigne, L. D. Matthews, W. van Driel","submitted_at":"2000-10-03T23:06:12Z","abstract_excerpt":"We have used the Nancay Radio Telescope to obtain new global HI data for 16 giant low surface brightness (LSB) galaxies. Our targets have optical luminosities and disk scale lengths at the high end for spiral galaxies (L_B~10^10 Lsun and h_r>~6 kpc for H_0=75 km/s/Mpc), but they have diffuse stellar disks, with mean disk surface brightnesses ~1 magnitude or more fainter than normal giant spirals. Thirteen of the galaxies previously had been detected in HI by other workers, but the published HI observations were either confused, resolved by the telescope beam, of low signal-to-noise, or showed "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0010075","kind":"arxiv","version":2},"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/0010075/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":"2026-07-04T16:17:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HQxvxKZBnx5rRKmM6W9gLyUDmtrJLDU7M3HFmRaS/o3w2l2hH1SQNQuaPqapX+dF3Um8ys8cfmVl1tgshAGBCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T22:33:39.443232Z"},"content_sha256":"0bcb06dc5cf526998709a6e987bf69686308793443cf2768fdee05da86fed303","schema_version":"1.0","event_id":"sha256:0bcb06dc5cf526998709a6e987bf69686308793443cf2768fdee05da86fed303"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/P3WLDW4XXGYRM6GB6ZCKEZFF3H/bundle.json","state_url":"https://pith.science/pith/P3WLDW4XXGYRM6GB6ZCKEZFF3H/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/P3WLDW4XXGYRM6GB6ZCKEZFF3H/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":"2026-08-17T22:33:39Z","links":{"resolver":"https://pith.science/pith/P3WLDW4XXGYRM6GB6ZCKEZFF3H","bundle":"https://pith.science/pith/P3WLDW4XXGYRM6GB6ZCKEZFF3H/bundle.json","state":"https://pith.science/pith/P3WLDW4XXGYRM6GB6ZCKEZFF3H/state.json","well_known_bundle":"https://pith.science/.well-known/pith/P3WLDW4XXGYRM6GB6ZCKEZFF3H/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2000:P3WLDW4XXGYRM6GB6ZCKEZFF3H","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":"fb6300acfdb77c4333e8559b89a42b7b323f49db910b9ee6786f5231a33c0336","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-10-03T23:06:12Z","title_canon_sha256":"d5b790a728a1c66dee85714c9e182b0b8f021c8c505dca5c574b30e9d0be237a"},"schema_version":"1.0","source":{"id":"astro-ph/0010075","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0010075","created_at":"2026-07-04T16:17:14Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0010075v2","created_at":"2026-07-04T16:17:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0010075","created_at":"2026-07-04T16:17:14Z"},{"alias_kind":"pith_short_12","alias_value":"P3WLDW4XXGYR","created_at":"2026-07-04T16:17:14Z"},{"alias_kind":"pith_short_16","alias_value":"P3WLDW4XXGYRM6GB","created_at":"2026-07-04T16:17:14Z"},{"alias_kind":"pith_short_8","alias_value":"P3WLDW4X","created_at":"2026-07-04T16:17:14Z"}],"graph_snapshots":[{"event_id":"sha256:0bcb06dc5cf526998709a6e987bf69686308793443cf2768fdee05da86fed303","target":"graph","created_at":"2026-07-04T16:17:14Z","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/0010075/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We have used the Nancay Radio Telescope to obtain new global HI data for 16 giant low surface brightness (LSB) galaxies. Our targets have optical luminosities and disk scale lengths at the high end for spiral galaxies (L_B~10^10 Lsun and h_r>~6 kpc for H_0=75 km/s/Mpc), but they have diffuse stellar disks, with mean disk surface brightnesses ~1 magnitude or more fainter than normal giant spirals. Thirteen of the galaxies previously had been detected in HI by other workers, but the published HI observations were either confused, resolved by the telescope beam, of low signal-to-noise, or showed ","authors_text":"D. Monnier-Ragaigne, L. D. Matthews, W. van Driel","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2000-10-03T23:06:12Z","title":"HI Observations of Giant Low Surface Brightness Galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0010075","kind":"arxiv","version":2},"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:fc6813560318eba17e7029f68092d195df702a58b3a96d756e5ec051aa0a1b6e","target":"record","created_at":"2026-07-04T16:17:14Z","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":"fb6300acfdb77c4333e8559b89a42b7b323f49db910b9ee6786f5231a33c0336","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-10-03T23:06:12Z","title_canon_sha256":"d5b790a728a1c66dee85714c9e182b0b8f021c8c505dca5c574b30e9d0be237a"},"schema_version":"1.0","source":{"id":"astro-ph/0010075","kind":"arxiv","version":2}},"canonical_sha256":"7eecb1db97b9b11678c1f644a264a5d9e98dc05635caa71c929ef8aacc3e0efa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7eecb1db97b9b11678c1f644a264a5d9e98dc05635caa71c929ef8aacc3e0efa","first_computed_at":"2026-07-04T16:17:14.444911Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:17:14.444911Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vB/qLPbHzDFNY5BvWOlKwNxwXd/gH/ba0N/K3IItl4qLVwM/Q0rW9RoOv/thGPdSWbBrqfpgDzJQbRrRKS8pDw==","signature_status":"signed_v1","signed_at":"2026-07-04T16:17:14.445322Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0010075","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fc6813560318eba17e7029f68092d195df702a58b3a96d756e5ec051aa0a1b6e","sha256:0bcb06dc5cf526998709a6e987bf69686308793443cf2768fdee05da86fed303"],"state_sha256":"169f993a8fa0573d73db4c71065726880693d2b3fb160b30a9cd2f30f0913367"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PiSyydtOVSKdnx5lbygi7gbsufscMgsT81sGxmugbpGBBAhXkyPvTbCG8mH8xfdhB3JXdxaPZ+Ud/xa/w/J7CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-17T22:33:39.448851Z","bundle_sha256":"479f06143c2df67bce7cb60af1f239641c7e8b998c0217a3fb8b4dc55c2cef31"}}