{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:5LZUUTFAH45RDCMT7T26N2E7WS","short_pith_number":"pith:5LZUUTFA","canonical_record":{"source":{"id":"0909.1755","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-09-09T17:56:16Z","cross_cats_sorted":[],"title_canon_sha256":"9d2dec9c0e0d2acdf1021a1de3766c754381a1f043e115d0ef4c3bdc57a4174c","abstract_canon_sha256":"0f2a4525323a409dcb83497776c5dfabb65b6d356b06f6e0214667cb633fbe94"},"schema_version":"1.0"},"canonical_sha256":"eaf34a4ca03f3b118993fcf5e6e89fb48f3b504ff2c758073f854a77f8be0650","source":{"kind":"arxiv","id":"0909.1755","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.1755","created_at":"2026-05-18T02:11:57Z"},{"alias_kind":"arxiv_version","alias_value":"0909.1755v1","created_at":"2026-05-18T02:11:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.1755","created_at":"2026-05-18T02:11:57Z"},{"alias_kind":"pith_short_12","alias_value":"5LZUUTFAH45R","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"5LZUUTFAH45RDCMT","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"5LZUUTFA","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:5LZUUTFAH45RDCMT7T26N2E7WS","target":"record","payload":{"canonical_record":{"source":{"id":"0909.1755","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-09-09T17:56:16Z","cross_cats_sorted":[],"title_canon_sha256":"9d2dec9c0e0d2acdf1021a1de3766c754381a1f043e115d0ef4c3bdc57a4174c","abstract_canon_sha256":"0f2a4525323a409dcb83497776c5dfabb65b6d356b06f6e0214667cb633fbe94"},"schema_version":"1.0"},"canonical_sha256":"eaf34a4ca03f3b118993fcf5e6e89fb48f3b504ff2c758073f854a77f8be0650","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:11:57.921177Z","signature_b64":"MK5ODCF/Ffa6nK7Mb6Cl8qlYRBHdKHsKp3h6NX4d8cOUpw+v0ikkqCNWZVjXZb0UHmm+/4u3KaAHYccocvnfBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"eaf34a4ca03f3b118993fcf5e6e89fb48f3b504ff2c758073f854a77f8be0650","last_reissued_at":"2026-05-18T02:11:57.920440Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:11:57.920440Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0909.1755","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":"2026-05-18T02:11:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"deTksmZRBua7+vffzmOitZEV2v6iwyrcoIvt4NsCHPoQeYgMith1b7CNmrK8On3J7/XF/qR8PSBVpuaZcaZvDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T15:17:15.746445Z"},"content_sha256":"e452788860205c8cf378b5ceb41aaa0c3cb5697c4a4d47ebb5476df6b7b602da","schema_version":"1.0","event_id":"sha256:e452788860205c8cf378b5ceb41aaa0c3cb5697c4a4d47ebb5476df6b7b602da"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:5LZUUTFAH45RDCMT7T26N2E7WS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A 500 Parsec Halo Surrounding the Galactic Globular NGC 1851","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Abhijit Saha, Annapurni Subramaniam, Edward W. Olszewski, Patricia Knezek, Patrick Seitzer, Thomas de Boer","submitted_at":"2009-09-09T17:56:16Z","abstract_excerpt":"Using imaging that shows four magnitudes of main sequence stars, we have discovered that the Galactic globular cluster NGC 1851 is surrounded by a halo that is visible from the tidal radius of 700 arcsec (41 pc) to more than 4500 arcsec (>250 pc). This halo is symmetric and falls in density as a power law of $r^{-1.24}$. It contains approximately 0.1% of the dynamical mass of NGC 1851. There is no evidence for tidal tails. Current models of globular cluster evolution do not explain this feature, although simulations of tidal influences on dwarf spheroidal galaxies qualitatively mimic these res"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.1755","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":"2026-05-18T02:11:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tPWFGA0PRb1iVIkd/odK3p05SpQ2ZiDrf8/D3UgZ2CooD+Wf68kmz7kPDxiPJMuHweGSXAwWzNU7Q9xfM8peBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T15:17:15.746799Z"},"content_sha256":"de980a7fbe20462be2a93a8e7d03083dc7763cef014711d98e50c7abd5b845a6","schema_version":"1.0","event_id":"sha256:de980a7fbe20462be2a93a8e7d03083dc7763cef014711d98e50c7abd5b845a6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5LZUUTFAH45RDCMT7T26N2E7WS/bundle.json","state_url":"https://pith.science/pith/5LZUUTFAH45RDCMT7T26N2E7WS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5LZUUTFAH45RDCMT7T26N2E7WS/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":"2026-06-05T15:17:15Z","links":{"resolver":"https://pith.science/pith/5LZUUTFAH45RDCMT7T26N2E7WS","bundle":"https://pith.science/pith/5LZUUTFAH45RDCMT7T26N2E7WS/bundle.json","state":"https://pith.science/pith/5LZUUTFAH45RDCMT7T26N2E7WS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5LZUUTFAH45RDCMT7T26N2E7WS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:5LZUUTFAH45RDCMT7T26N2E7WS","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":"0f2a4525323a409dcb83497776c5dfabb65b6d356b06f6e0214667cb633fbe94","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-09-09T17:56:16Z","title_canon_sha256":"9d2dec9c0e0d2acdf1021a1de3766c754381a1f043e115d0ef4c3bdc57a4174c"},"schema_version":"1.0","source":{"id":"0909.1755","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.1755","created_at":"2026-05-18T02:11:57Z"},{"alias_kind":"arxiv_version","alias_value":"0909.1755v1","created_at":"2026-05-18T02:11:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.1755","created_at":"2026-05-18T02:11:57Z"},{"alias_kind":"pith_short_12","alias_value":"5LZUUTFAH45R","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"5LZUUTFAH45RDCMT","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"5LZUUTFA","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:de980a7fbe20462be2a93a8e7d03083dc7763cef014711d98e50c7abd5b845a6","target":"graph","created_at":"2026-05-18T02:11:57Z","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":"Using imaging that shows four magnitudes of main sequence stars, we have discovered that the Galactic globular cluster NGC 1851 is surrounded by a halo that is visible from the tidal radius of 700 arcsec (41 pc) to more than 4500 arcsec (>250 pc). This halo is symmetric and falls in density as a power law of $r^{-1.24}$. It contains approximately 0.1% of the dynamical mass of NGC 1851. There is no evidence for tidal tails. Current models of globular cluster evolution do not explain this feature, although simulations of tidal influences on dwarf spheroidal galaxies qualitatively mimic these res","authors_text":"Abhijit Saha, Annapurni Subramaniam, Edward W. Olszewski, Patricia Knezek, Patrick Seitzer, Thomas de Boer","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-09-09T17:56:16Z","title":"A 500 Parsec Halo Surrounding the Galactic Globular NGC 1851"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.1755","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:e452788860205c8cf378b5ceb41aaa0c3cb5697c4a4d47ebb5476df6b7b602da","target":"record","created_at":"2026-05-18T02:11:57Z","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":"0f2a4525323a409dcb83497776c5dfabb65b6d356b06f6e0214667cb633fbe94","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-09-09T17:56:16Z","title_canon_sha256":"9d2dec9c0e0d2acdf1021a1de3766c754381a1f043e115d0ef4c3bdc57a4174c"},"schema_version":"1.0","source":{"id":"0909.1755","kind":"arxiv","version":1}},"canonical_sha256":"eaf34a4ca03f3b118993fcf5e6e89fb48f3b504ff2c758073f854a77f8be0650","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"eaf34a4ca03f3b118993fcf5e6e89fb48f3b504ff2c758073f854a77f8be0650","first_computed_at":"2026-05-18T02:11:57.920440Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:11:57.920440Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MK5ODCF/Ffa6nK7Mb6Cl8qlYRBHdKHsKp3h6NX4d8cOUpw+v0ikkqCNWZVjXZb0UHmm+/4u3KaAHYccocvnfBA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:11:57.921177Z","signed_message":"canonical_sha256_bytes"},"source_id":"0909.1755","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e452788860205c8cf378b5ceb41aaa0c3cb5697c4a4d47ebb5476df6b7b602da","sha256:de980a7fbe20462be2a93a8e7d03083dc7763cef014711d98e50c7abd5b845a6"],"state_sha256":"26d5e96434c77e1219ab0ec02203f1cdb3dd129532a9f995660ec05787a3cfac"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"slB7757Iy4KRYFCMIERmUkIBtJjBZWDPA1ulAK+z7qK8kKu18YNG8YY5yV9+8bunxUun2/xu/OZZ1K0/nIpVCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T15:17:15.748759Z","bundle_sha256":"65c33c0f2d369dcaca0238fbe270aecd3ecc4fde3aac45332caa697ecdc8f893"}}