{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2003:JVBYI2HSINCUVYIWFRNDUIURAB","short_pith_number":"pith:JVBYI2HS","canonical_record":{"source":{"id":"astro-ph/0311539","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2003-11-24T16:57:17Z","cross_cats_sorted":[],"title_canon_sha256":"d37d73868fef0ced955dedbca48772c0a975144ac2967d80e979eccf39796bf9","abstract_canon_sha256":"72cba25d11024a324ebec78d9faa357c430f31e4cae3e076c02a46795f35beb9"},"schema_version":"1.0"},"canonical_sha256":"4d438468f243454ae1162c5a3a22910049ae81ffc56ef443edd7c54d66fdcf0f","source":{"kind":"arxiv","id":"astro-ph/0311539","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0311539","created_at":"2026-07-04T14:13:12Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0311539v1","created_at":"2026-07-04T14:13:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0311539","created_at":"2026-07-04T14:13:12Z"},{"alias_kind":"pith_short_12","alias_value":"JVBYI2HSINCU","created_at":"2026-07-04T14:13:12Z"},{"alias_kind":"pith_short_16","alias_value":"JVBYI2HSINCUVYIW","created_at":"2026-07-04T14:13:12Z"},{"alias_kind":"pith_short_8","alias_value":"JVBYI2HS","created_at":"2026-07-04T14:13:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2003:JVBYI2HSINCUVYIWFRNDUIURAB","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0311539","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2003-11-24T16:57:17Z","cross_cats_sorted":[],"title_canon_sha256":"d37d73868fef0ced955dedbca48772c0a975144ac2967d80e979eccf39796bf9","abstract_canon_sha256":"72cba25d11024a324ebec78d9faa357c430f31e4cae3e076c02a46795f35beb9"},"schema_version":"1.0"},"canonical_sha256":"4d438468f243454ae1162c5a3a22910049ae81ffc56ef443edd7c54d66fdcf0f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T14:13:12.559930Z","signature_b64":"kTab7tBdqFiooY7arJYFF61MJxnHWl+zGjp3VHOceh1odm+wnT6TILScjmJMT5xLOm+IhRaURe0cM6zjNe4rBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4d438468f243454ae1162c5a3a22910049ae81ffc56ef443edd7c54d66fdcf0f","last_reissued_at":"2026-07-04T14:13:12.559480Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T14:13:12.559480Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0311539","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":"2026-07-04T14:13:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/jtaKQ0TiLIIRUq1I2N3PUoYVAlN0mLo8z4uar4GM6RB39yGEwPKa9285j+yDp2ZwvvbO4UvxNVLYfBLepBnAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T04:23:52.411755Z"},"content_sha256":"797f911a80a5246392bcc97b294284cb468caf1389cce6fd2bd339018c0feeb9","schema_version":"1.0","event_id":"sha256:797f911a80a5246392bcc97b294284cb468caf1389cce6fd2bd339018c0feeb9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2003:JVBYI2HSINCUVYIWFRNDUIURAB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"HI and Hot Gas in the Outskirts of the M81 Group","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"C. Carignan, F. Walter, J. van Gorkom, M. Bureau","submitted_at":"2003-11-24T16:57:17Z","abstract_excerpt":"Results are presented from a wide area, high resolution HI synthesis survey of the outer regions of the nearby M81 group, where internal (galactic) and external (group-related) evolution processes can be studied simultaneously in great detail. The survey encompasses the star forming dwarf galaxies M81dwA, UGC4483, and HoII, where evidence of ram pressure stripping was recently discovered. The data do not reveal any intergalactic HI, but the outer parts of HoII are reminiscent of tidal tails. We argue however that those structures are equally consistent with the latest ram pressure models inclu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0311539","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/0311539/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":"2026-07-04T14:13:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JUKrVbkiFAOiMDvyhdxNP8bioobZ+qcPmLLagFtOd6ZYV55SOw9Pmv9AIcw9rJm9AqRPE8Ey4zs/1R9MC4AaCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T04:23:52.412125Z"},"content_sha256":"03d3caf970e46d5d51c7ee0a656796d73df4f768fb94c33caed8f4c229ac982b","schema_version":"1.0","event_id":"sha256:03d3caf970e46d5d51c7ee0a656796d73df4f768fb94c33caed8f4c229ac982b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JVBYI2HSINCUVYIWFRNDUIURAB/bundle.json","state_url":"https://pith.science/pith/JVBYI2HSINCUVYIWFRNDUIURAB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JVBYI2HSINCUVYIWFRNDUIURAB/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":"2026-07-05T04:23:52Z","links":{"resolver":"https://pith.science/pith/JVBYI2HSINCUVYIWFRNDUIURAB","bundle":"https://pith.science/pith/JVBYI2HSINCUVYIWFRNDUIURAB/bundle.json","state":"https://pith.science/pith/JVBYI2HSINCUVYIWFRNDUIURAB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JVBYI2HSINCUVYIWFRNDUIURAB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2003:JVBYI2HSINCUVYIWFRNDUIURAB","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":"72cba25d11024a324ebec78d9faa357c430f31e4cae3e076c02a46795f35beb9","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-11-24T16:57:17Z","title_canon_sha256":"d37d73868fef0ced955dedbca48772c0a975144ac2967d80e979eccf39796bf9"},"schema_version":"1.0","source":{"id":"astro-ph/0311539","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0311539","created_at":"2026-07-04T14:13:12Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0311539v1","created_at":"2026-07-04T14:13:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0311539","created_at":"2026-07-04T14:13:12Z"},{"alias_kind":"pith_short_12","alias_value":"JVBYI2HSINCU","created_at":"2026-07-04T14:13:12Z"},{"alias_kind":"pith_short_16","alias_value":"JVBYI2HSINCUVYIW","created_at":"2026-07-04T14:13:12Z"},{"alias_kind":"pith_short_8","alias_value":"JVBYI2HS","created_at":"2026-07-04T14:13:12Z"}],"graph_snapshots":[{"event_id":"sha256:03d3caf970e46d5d51c7ee0a656796d73df4f768fb94c33caed8f4c229ac982b","target":"graph","created_at":"2026-07-04T14:13:12Z","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/0311539/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Results are presented from a wide area, high resolution HI synthesis survey of the outer regions of the nearby M81 group, where internal (galactic) and external (group-related) evolution processes can be studied simultaneously in great detail. The survey encompasses the star forming dwarf galaxies M81dwA, UGC4483, and HoII, where evidence of ram pressure stripping was recently discovered. The data do not reveal any intergalactic HI, but the outer parts of HoII are reminiscent of tidal tails. We argue however that those structures are equally consistent with the latest ram pressure models inclu","authors_text":"C. Carignan, F. Walter, J. van Gorkom, M. Bureau","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2003-11-24T16:57:17Z","title":"HI and Hot Gas in the Outskirts of the M81 Group"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0311539","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":"sha256:797f911a80a5246392bcc97b294284cb468caf1389cce6fd2bd339018c0feeb9","target":"record","created_at":"2026-07-04T14:13:12Z","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":"72cba25d11024a324ebec78d9faa357c430f31e4cae3e076c02a46795f35beb9","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-11-24T16:57:17Z","title_canon_sha256":"d37d73868fef0ced955dedbca48772c0a975144ac2967d80e979eccf39796bf9"},"schema_version":"1.0","source":{"id":"astro-ph/0311539","kind":"arxiv","version":1}},"canonical_sha256":"4d438468f243454ae1162c5a3a22910049ae81ffc56ef443edd7c54d66fdcf0f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4d438468f243454ae1162c5a3a22910049ae81ffc56ef443edd7c54d66fdcf0f","first_computed_at":"2026-07-04T14:13:12.559480Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T14:13:12.559480Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kTab7tBdqFiooY7arJYFF61MJxnHWl+zGjp3VHOceh1odm+wnT6TILScjmJMT5xLOm+IhRaURe0cM6zjNe4rBg==","signature_status":"signed_v1","signed_at":"2026-07-04T14:13:12.559930Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0311539","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:797f911a80a5246392bcc97b294284cb468caf1389cce6fd2bd339018c0feeb9","sha256:03d3caf970e46d5d51c7ee0a656796d73df4f768fb94c33caed8f4c229ac982b"],"state_sha256":"4b14f679a48e9d493a90a2a6c520d83287ae39eab49c732bf57c6be257e19ae8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w+xVkFXjAYMSVQ9Ttz+p8H+Nvmv12s+adhUjYipBcS+AMwxX4tPCjvADvcDF4w18yVg+pZGfnORu0Fqu76nDDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T04:23:52.414177Z","bundle_sha256":"c586467d2a5539f04b795500176caef56f92529712e07ab8abd06104634b406a"}}