{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:ZL2PW6RPN5BIGVKWHEL2M4JCF5","short_pith_number":"pith:ZL2PW6RP","canonical_record":{"source":{"id":"1604.08862","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-04-29T14:58:09Z","cross_cats_sorted":[],"title_canon_sha256":"2d546f94eaf949428bbe60be165ae5f9ebe79337f67a37f3880d868903f04c0f","abstract_canon_sha256":"ffb01c6579ef1f517a7aaee62fb70ffc684004ac87edb46dddd3d37d6be22d5e"},"schema_version":"1.0"},"canonical_sha256":"caf4fb7a2f6f428355563917a671222f4cf67bd043967687f4af38aada9fe4b6","source":{"kind":"arxiv","id":"1604.08862","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.08862","created_at":"2026-05-18T01:11:44Z"},{"alias_kind":"arxiv_version","alias_value":"1604.08862v2","created_at":"2026-05-18T01:11:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.08862","created_at":"2026-05-18T01:11:44Z"},{"alias_kind":"pith_short_12","alias_value":"ZL2PW6RPN5BI","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_16","alias_value":"ZL2PW6RPN5BIGVKW","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_8","alias_value":"ZL2PW6RP","created_at":"2026-05-18T12:30:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:ZL2PW6RPN5BIGVKWHEL2M4JCF5","target":"record","payload":{"canonical_record":{"source":{"id":"1604.08862","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-04-29T14:58:09Z","cross_cats_sorted":[],"title_canon_sha256":"2d546f94eaf949428bbe60be165ae5f9ebe79337f67a37f3880d868903f04c0f","abstract_canon_sha256":"ffb01c6579ef1f517a7aaee62fb70ffc684004ac87edb46dddd3d37d6be22d5e"},"schema_version":"1.0"},"canonical_sha256":"caf4fb7a2f6f428355563917a671222f4cf67bd043967687f4af38aada9fe4b6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:11:44.365295Z","signature_b64":"7KBYttiA/RVMuFxaNsmtyCU3/k4zuuKWapKaZr6GFaeXeyXBonge3trAOjmuLMzUT36UWxH8d6n2G7PWuLO5Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"caf4fb7a2f6f428355563917a671222f4cf67bd043967687f4af38aada9fe4b6","last_reissued_at":"2026-05-18T01:11:44.364965Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:11:44.364965Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1604.08862","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":"2026-05-18T01:11:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YQOIdUX7rDUY6aUqdZCY3jKvrZ3kkcFCHz1JH/Y14/eH1+ELcOLJyoTX8GG3cTsdeswV/kR+QPZ8DyHtuGR2Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T04:19:03.229637Z"},"content_sha256":"d953a6dd382161a62dafae78798bac2f621a32e1a905a55e22c18de1807bef77","schema_version":"1.0","event_id":"sha256:d953a6dd382161a62dafae78798bac2f621a32e1a905a55e22c18de1807bef77"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:ZL2PW6RPN5BIGVKWHEL2M4JCF5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The HI Content of Galaxies in Groups and Clusters as Measured by ALFALFA","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Adina Micula, Christopher McGowan, Gregory Hallenbeck, Lyle Reed, Martha P. Haynes, Mary Crone Odekon, Rebecca A. Koopmann, Riccardo Giovanelli, Rose A. Finn","submitted_at":"2016-04-29T14:58:09Z","abstract_excerpt":"We present the HI content of galaxies in nearby groups and clusters as measured by the 70% complete Arecibo Legacy Fast-ALFA (ALFALFA) survey, including constraints from ALFALFA detection limits. Our sample includes 22 systems at distances between 70-160 Mpc over the mass range 12.5<log M/M_sun<15.0, for a total of 1986 late-type galaxies. We find that late-type galaxies in the centers of groups lack HI at fixed stellar mass relative to the regions surrounding them. Larger groups show evidence of a stronger dependence of HI properties on environment, despite a similar dependence of color on en"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.08862","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":""},"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":"2026-05-18T01:11:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WpjU3dUwMyohY4iCgEYW9ZxXMZzV0hiLMUaGaZgbmZCXmzN9BO5L5krxsEmx8zfQx2nFNVzplzublElTuiaQDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T04:19:03.229982Z"},"content_sha256":"5e5460559a79913c4a5879988856e9f72daaf695b5fbf1797308d18e82fabcb6","schema_version":"1.0","event_id":"sha256:5e5460559a79913c4a5879988856e9f72daaf695b5fbf1797308d18e82fabcb6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZL2PW6RPN5BIGVKWHEL2M4JCF5/bundle.json","state_url":"https://pith.science/pith/ZL2PW6RPN5BIGVKWHEL2M4JCF5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZL2PW6RPN5BIGVKWHEL2M4JCF5/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":"2026-06-28T04:19:03Z","links":{"resolver":"https://pith.science/pith/ZL2PW6RPN5BIGVKWHEL2M4JCF5","bundle":"https://pith.science/pith/ZL2PW6RPN5BIGVKWHEL2M4JCF5/bundle.json","state":"https://pith.science/pith/ZL2PW6RPN5BIGVKWHEL2M4JCF5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZL2PW6RPN5BIGVKWHEL2M4JCF5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:ZL2PW6RPN5BIGVKWHEL2M4JCF5","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":"ffb01c6579ef1f517a7aaee62fb70ffc684004ac87edb46dddd3d37d6be22d5e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-04-29T14:58:09Z","title_canon_sha256":"2d546f94eaf949428bbe60be165ae5f9ebe79337f67a37f3880d868903f04c0f"},"schema_version":"1.0","source":{"id":"1604.08862","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.08862","created_at":"2026-05-18T01:11:44Z"},{"alias_kind":"arxiv_version","alias_value":"1604.08862v2","created_at":"2026-05-18T01:11:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.08862","created_at":"2026-05-18T01:11:44Z"},{"alias_kind":"pith_short_12","alias_value":"ZL2PW6RPN5BI","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_16","alias_value":"ZL2PW6RPN5BIGVKW","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_8","alias_value":"ZL2PW6RP","created_at":"2026-05-18T12:30:53Z"}],"graph_snapshots":[{"event_id":"sha256:5e5460559a79913c4a5879988856e9f72daaf695b5fbf1797308d18e82fabcb6","target":"graph","created_at":"2026-05-18T01:11:44Z","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"},"paper":{"abstract_excerpt":"We present the HI content of galaxies in nearby groups and clusters as measured by the 70% complete Arecibo Legacy Fast-ALFA (ALFALFA) survey, including constraints from ALFALFA detection limits. Our sample includes 22 systems at distances between 70-160 Mpc over the mass range 12.5<log M/M_sun<15.0, for a total of 1986 late-type galaxies. We find that late-type galaxies in the centers of groups lack HI at fixed stellar mass relative to the regions surrounding them. Larger groups show evidence of a stronger dependence of HI properties on environment, despite a similar dependence of color on en","authors_text":"Adina Micula, Christopher McGowan, Gregory Hallenbeck, Lyle Reed, Martha P. Haynes, Mary Crone Odekon, Rebecca A. Koopmann, Riccardo Giovanelli, Rose A. Finn","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-04-29T14:58:09Z","title":"The HI Content of Galaxies in Groups and Clusters as Measured by ALFALFA"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.08862","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:d953a6dd382161a62dafae78798bac2f621a32e1a905a55e22c18de1807bef77","target":"record","created_at":"2026-05-18T01:11:44Z","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":"ffb01c6579ef1f517a7aaee62fb70ffc684004ac87edb46dddd3d37d6be22d5e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-04-29T14:58:09Z","title_canon_sha256":"2d546f94eaf949428bbe60be165ae5f9ebe79337f67a37f3880d868903f04c0f"},"schema_version":"1.0","source":{"id":"1604.08862","kind":"arxiv","version":2}},"canonical_sha256":"caf4fb7a2f6f428355563917a671222f4cf67bd043967687f4af38aada9fe4b6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"caf4fb7a2f6f428355563917a671222f4cf67bd043967687f4af38aada9fe4b6","first_computed_at":"2026-05-18T01:11:44.364965Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:11:44.364965Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7KBYttiA/RVMuFxaNsmtyCU3/k4zuuKWapKaZr6GFaeXeyXBonge3trAOjmuLMzUT36UWxH8d6n2G7PWuLO5Bw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:11:44.365295Z","signed_message":"canonical_sha256_bytes"},"source_id":"1604.08862","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d953a6dd382161a62dafae78798bac2f621a32e1a905a55e22c18de1807bef77","sha256:5e5460559a79913c4a5879988856e9f72daaf695b5fbf1797308d18e82fabcb6"],"state_sha256":"14f2f992e70f9652edeb933cb00e2dfe11e0c9517afdb18c68ffaee5ed582956"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7XOvvBSOFvg+EOVNo0lDGB03J08jAJWtx9Zgt+8pzT7Oj6TRyJFqRshLFAqOLtkwwrE7aZbo+BPqTzro/wqtBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-28T04:19:03.231846Z","bundle_sha256":"83459f216e5759d5975318efe176be5a1d8725dc02d837403ed88f3df62360c2"}}