{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:M55KQLF4AF56U67IHLPYFM5VF4","short_pith_number":"pith:M55KQLF4","canonical_record":{"source":{"id":"1701.01754","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-01-06T20:48:53Z","cross_cats_sorted":[],"title_canon_sha256":"f54b4fa9357b035b587fa7cd50ae164d00fe38a8f953f3c171f9c65b0b275c1b","abstract_canon_sha256":"778229e2a94bd11731243126b0c64b2cfc4307f0c1b66aea148e0a8efab5188a"},"schema_version":"1.0"},"canonical_sha256":"677aa82cbc017bea7be83adf82b3b52f078879ad7801b8a27254226f40347fb3","source":{"kind":"arxiv","id":"1701.01754","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1701.01754","created_at":"2026-05-18T00:52:35Z"},{"alias_kind":"arxiv_version","alias_value":"1701.01754v1","created_at":"2026-05-18T00:52:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1701.01754","created_at":"2026-05-18T00:52:35Z"},{"alias_kind":"pith_short_12","alias_value":"M55KQLF4AF56","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_16","alias_value":"M55KQLF4AF56U67I","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_8","alias_value":"M55KQLF4","created_at":"2026-05-18T12:31:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:M55KQLF4AF56U67IHLPYFM5VF4","target":"record","payload":{"canonical_record":{"source":{"id":"1701.01754","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-01-06T20:48:53Z","cross_cats_sorted":[],"title_canon_sha256":"f54b4fa9357b035b587fa7cd50ae164d00fe38a8f953f3c171f9c65b0b275c1b","abstract_canon_sha256":"778229e2a94bd11731243126b0c64b2cfc4307f0c1b66aea148e0a8efab5188a"},"schema_version":"1.0"},"canonical_sha256":"677aa82cbc017bea7be83adf82b3b52f078879ad7801b8a27254226f40347fb3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:52:35.290921Z","signature_b64":"7O+lsaOFZKYyb/QZHTJI0M9yQXF0GhXuEUphIDKzosJvAjr2NcoUXcEc1B7nWgIMHyWPFqwbsGm2g/eY+sIvCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"677aa82cbc017bea7be83adf82b3b52f078879ad7801b8a27254226f40347fb3","last_reissued_at":"2026-05-18T00:52:35.290536Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:52:35.290536Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1701.01754","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":"2026-05-18T00:52:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M40v7Mys1F5aQ91nx3Ix76sDxbTflHp9XG2+pGG+OnGvdmpZKavqgOifFfCI7jtJeOQ8ZHrLmSvhFVTFIJrrCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T19:03:47.397138Z"},"content_sha256":"c85b6dea08e3b9c25ff4c7a580fb6a2c3b54f749c11090f911c79203ed48733b","schema_version":"1.0","event_id":"sha256:c85b6dea08e3b9c25ff4c7a580fb6a2c3b54f749c11090f911c79203ed48733b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:M55KQLF4AF56U67IHLPYFM5VF4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"xGASS: Gas-rich central galaxies in small groups and their connections to cosmic web gas feeding","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Am\\'elie Saintonge, Barbara Catinella, Jing Wang, Luca Cortese, Steven Janowiecki, Toby Brown","submitted_at":"2017-01-06T20:48:53Z","abstract_excerpt":"We use deep HI observations obtained as part of the extended GALEX Arecibo SDSS survey (xGASS) to study the cold gas properties of central galaxies across environments. We find that, below stellar masses of 10^10.2 Msun, central galaxies in groups have an average atomic hydrogen gas fraction ~0.3dex higher than those in isolation at the same stellar mass. At these stellar masses, group central galaxies are usually found in small groups of N=2 members. The higher HI content in these low mass group central galaxies is mirrored by their higher average star formation activity and molecular hydroge"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.01754","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":""},"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":"2026-05-18T00:52:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DdlWmBcfLA60deLFjLNybgZ7WZJ25Ed10uxi89J8vZ/zQpov70kKJRHmbY1h+iWN/WKHWYlMH8OhmeHYRHScDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T19:03:47.397917Z"},"content_sha256":"61bae397ba1f929d34d2154d036403384acf37b6399d2c7b6d5fc6f64ba021c0","schema_version":"1.0","event_id":"sha256:61bae397ba1f929d34d2154d036403384acf37b6399d2c7b6d5fc6f64ba021c0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/M55KQLF4AF56U67IHLPYFM5VF4/bundle.json","state_url":"https://pith.science/pith/M55KQLF4AF56U67IHLPYFM5VF4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/M55KQLF4AF56U67IHLPYFM5VF4/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":"2026-06-08T19:03:47Z","links":{"resolver":"https://pith.science/pith/M55KQLF4AF56U67IHLPYFM5VF4","bundle":"https://pith.science/pith/M55KQLF4AF56U67IHLPYFM5VF4/bundle.json","state":"https://pith.science/pith/M55KQLF4AF56U67IHLPYFM5VF4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/M55KQLF4AF56U67IHLPYFM5VF4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:M55KQLF4AF56U67IHLPYFM5VF4","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":"778229e2a94bd11731243126b0c64b2cfc4307f0c1b66aea148e0a8efab5188a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-01-06T20:48:53Z","title_canon_sha256":"f54b4fa9357b035b587fa7cd50ae164d00fe38a8f953f3c171f9c65b0b275c1b"},"schema_version":"1.0","source":{"id":"1701.01754","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1701.01754","created_at":"2026-05-18T00:52:35Z"},{"alias_kind":"arxiv_version","alias_value":"1701.01754v1","created_at":"2026-05-18T00:52:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1701.01754","created_at":"2026-05-18T00:52:35Z"},{"alias_kind":"pith_short_12","alias_value":"M55KQLF4AF56","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_16","alias_value":"M55KQLF4AF56U67I","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_8","alias_value":"M55KQLF4","created_at":"2026-05-18T12:31:28Z"}],"graph_snapshots":[{"event_id":"sha256:61bae397ba1f929d34d2154d036403384acf37b6399d2c7b6d5fc6f64ba021c0","target":"graph","created_at":"2026-05-18T00:52:35Z","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 use deep HI observations obtained as part of the extended GALEX Arecibo SDSS survey (xGASS) to study the cold gas properties of central galaxies across environments. We find that, below stellar masses of 10^10.2 Msun, central galaxies in groups have an average atomic hydrogen gas fraction ~0.3dex higher than those in isolation at the same stellar mass. At these stellar masses, group central galaxies are usually found in small groups of N=2 members. The higher HI content in these low mass group central galaxies is mirrored by their higher average star formation activity and molecular hydroge","authors_text":"Am\\'elie Saintonge, Barbara Catinella, Jing Wang, Luca Cortese, Steven Janowiecki, Toby Brown","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-01-06T20:48:53Z","title":"xGASS: Gas-rich central galaxies in small groups and their connections to cosmic web gas feeding"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.01754","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:c85b6dea08e3b9c25ff4c7a580fb6a2c3b54f749c11090f911c79203ed48733b","target":"record","created_at":"2026-05-18T00:52:35Z","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":"778229e2a94bd11731243126b0c64b2cfc4307f0c1b66aea148e0a8efab5188a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-01-06T20:48:53Z","title_canon_sha256":"f54b4fa9357b035b587fa7cd50ae164d00fe38a8f953f3c171f9c65b0b275c1b"},"schema_version":"1.0","source":{"id":"1701.01754","kind":"arxiv","version":1}},"canonical_sha256":"677aa82cbc017bea7be83adf82b3b52f078879ad7801b8a27254226f40347fb3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"677aa82cbc017bea7be83adf82b3b52f078879ad7801b8a27254226f40347fb3","first_computed_at":"2026-05-18T00:52:35.290536Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:52:35.290536Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7O+lsaOFZKYyb/QZHTJI0M9yQXF0GhXuEUphIDKzosJvAjr2NcoUXcEc1B7nWgIMHyWPFqwbsGm2g/eY+sIvCA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:52:35.290921Z","signed_message":"canonical_sha256_bytes"},"source_id":"1701.01754","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c85b6dea08e3b9c25ff4c7a580fb6a2c3b54f749c11090f911c79203ed48733b","sha256:61bae397ba1f929d34d2154d036403384acf37b6399d2c7b6d5fc6f64ba021c0"],"state_sha256":"f0248302a1e203e85e66cae75f3b919c16364275fc843f745df8b460f889cb0c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w3jzqa0rgQIhf5Qcgn++m4c0OaC2ueaqIh+Fbw8lQ9QaglEXT088u67C09IFJmvv4XGzsVHWprg8pLtc2FiiBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T19:03:47.402176Z","bundle_sha256":"e3a13a5dee91b7b39bb03a0a9871a1911519f153f9fac86a582c1f44ef4b8963"}}