{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:G2W7LFPPHVZ67ZLDFP2HEWBE7R","short_pith_number":"pith:G2W7LFPP","canonical_record":{"source":{"id":"1303.4736","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-03-19T20:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"e7d22c92d754b603693c7fadd634472068ed47faf84d5a3880278063f5c8fb81","abstract_canon_sha256":"1543356101ee300be2dfffa5411e26a887675b9f85e701d971aedaaf0340c655"},"schema_version":"1.0"},"canonical_sha256":"36adf595ef3d73efe5632bf4725824fc70d2a74b1a18b324d62b49ef6fc2e7ca","source":{"kind":"arxiv","id":"1303.4736","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.4736","created_at":"2026-05-18T01:51:00Z"},{"alias_kind":"arxiv_version","alias_value":"1303.4736v1","created_at":"2026-05-18T01:51:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.4736","created_at":"2026-05-18T01:51:00Z"},{"alias_kind":"pith_short_12","alias_value":"G2W7LFPPHVZ6","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"G2W7LFPPHVZ67ZLD","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"G2W7LFPP","created_at":"2026-05-18T12:27:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:G2W7LFPPHVZ67ZLDFP2HEWBE7R","target":"record","payload":{"canonical_record":{"source":{"id":"1303.4736","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-03-19T20:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"e7d22c92d754b603693c7fadd634472068ed47faf84d5a3880278063f5c8fb81","abstract_canon_sha256":"1543356101ee300be2dfffa5411e26a887675b9f85e701d971aedaaf0340c655"},"schema_version":"1.0"},"canonical_sha256":"36adf595ef3d73efe5632bf4725824fc70d2a74b1a18b324d62b49ef6fc2e7ca","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:51:00.592186Z","signature_b64":"e4dJVS+M5F5mFMa8y0LBeGu32kk63jGXvEy0IulfT+/vgUGED4bnJVHBUSFxh1r1YYH4/Gu1RKeUAu6xTzOJAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"36adf595ef3d73efe5632bf4725824fc70d2a74b1a18b324d62b49ef6fc2e7ca","last_reissued_at":"2026-05-18T01:51:00.591543Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:51:00.591543Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1303.4736","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":"2026-05-18T01:51:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+VIdCa+SLwdnf3w1xjFEZ5ISo5bsZ0t8KvWpn68zCmofDb4aRigjtr4Jne3QbOAnkm+hOv9hGP5hdjEH+7FxDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T18:53:03.358858Z"},"content_sha256":"830f53d366491517cc0e1c4d422dc2615eae9ebf66e31435ed95e58c100ac644","schema_version":"1.0","event_id":"sha256:830f53d366491517cc0e1c4d422dc2615eae9ebf66e31435ed95e58c100ac644"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:G2W7LFPPHVZ67ZLDFP2HEWBE7R","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Outer Halo of the Nearest Giant Elliptical: A VLT/VIMOS Survey of the Resolved Stellar Populations in Centaurus A to 85 kpc","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"(2) Institute of Astronomy, (3) Subaru Telescope, 4), (4) Department of Astronomical Science, (5) Laboratoire d'Astrophysique, 6), (6) GEPI, (7) School of Physics, 8) ((1) Institute for Astronomy, (8) Research School of Astronomy, A. M. N. Ferguson (1), Astronomy, Astrophysics, Australia), Cambridge, C. Kobayashi (7, D. Crnojevi\\'c (1), Ecole Polytechnique F\\'ed\\'erale de Lausanne, E. J. Bernard (1), France, Graduate University for Advanced Studies, Hawaii, Japan, Mathematics, M. J. Irwin (2), N. Arimoto (3, National Astronomical Observatory of Japan, Observatoire de Paris, P. Jablonka (5, Royal Observatory, Switzerland, The Australian National University, Tokyo, UK, University of Edinburgh, University of Hertfordshire, USA","submitted_at":"2013-03-19T20:00:02Z","abstract_excerpt":"We present the first deep survey of resolved stellar populations in the remote outer halo of our nearest giant elliptical (gE), Centaurus A (D=3.8 Mpc). Using the VIMOS/VLT optical camera, we obtained deep photometry for four fields along the major and minor axes at projected elliptical radii of ~30-85 kpc (corresponding to ~5-14 R_{eff}). We use resolved star counts to map the spatial and colour distribution of red giant branch (RGB) stars down to ~2 magnitudes below the RGB tip. We detect an extended halo out to the furthermost elliptical radius probed (~85 kpc or ~14 R_{eff}), demonstrating"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.4736","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":"2026-05-18T01:51:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DsJWKZgaFLT8RofOL4OUXKc8zeqlwytRkAFaHYEJTzBVnsWboZ4XvmQ/JbgiwDDZeuJj2hRMHeTrhMvYgsrWBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T18:53:03.359272Z"},"content_sha256":"d551b80e4ec25bba502a54bbd9bed52c5dbcb0a67d89c7724a8bcb7586d5ccf2","schema_version":"1.0","event_id":"sha256:d551b80e4ec25bba502a54bbd9bed52c5dbcb0a67d89c7724a8bcb7586d5ccf2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/G2W7LFPPHVZ67ZLDFP2HEWBE7R/bundle.json","state_url":"https://pith.science/pith/G2W7LFPPHVZ67ZLDFP2HEWBE7R/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/G2W7LFPPHVZ67ZLDFP2HEWBE7R/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":"2026-05-26T18:53:03Z","links":{"resolver":"https://pith.science/pith/G2W7LFPPHVZ67ZLDFP2HEWBE7R","bundle":"https://pith.science/pith/G2W7LFPPHVZ67ZLDFP2HEWBE7R/bundle.json","state":"https://pith.science/pith/G2W7LFPPHVZ67ZLDFP2HEWBE7R/state.json","well_known_bundle":"https://pith.science/.well-known/pith/G2W7LFPPHVZ67ZLDFP2HEWBE7R/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:G2W7LFPPHVZ67ZLDFP2HEWBE7R","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":"1543356101ee300be2dfffa5411e26a887675b9f85e701d971aedaaf0340c655","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-03-19T20:00:02Z","title_canon_sha256":"e7d22c92d754b603693c7fadd634472068ed47faf84d5a3880278063f5c8fb81"},"schema_version":"1.0","source":{"id":"1303.4736","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.4736","created_at":"2026-05-18T01:51:00Z"},{"alias_kind":"arxiv_version","alias_value":"1303.4736v1","created_at":"2026-05-18T01:51:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.4736","created_at":"2026-05-18T01:51:00Z"},{"alias_kind":"pith_short_12","alias_value":"G2W7LFPPHVZ6","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"G2W7LFPPHVZ67ZLD","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"G2W7LFPP","created_at":"2026-05-18T12:27:45Z"}],"graph_snapshots":[{"event_id":"sha256:d551b80e4ec25bba502a54bbd9bed52c5dbcb0a67d89c7724a8bcb7586d5ccf2","target":"graph","created_at":"2026-05-18T01:51:00Z","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 first deep survey of resolved stellar populations in the remote outer halo of our nearest giant elliptical (gE), Centaurus A (D=3.8 Mpc). Using the VIMOS/VLT optical camera, we obtained deep photometry for four fields along the major and minor axes at projected elliptical radii of ~30-85 kpc (corresponding to ~5-14 R_{eff}). We use resolved star counts to map the spatial and colour distribution of red giant branch (RGB) stars down to ~2 magnitudes below the RGB tip. We detect an extended halo out to the furthermost elliptical radius probed (~85 kpc or ~14 R_{eff}), demonstrating","authors_text":"(2) Institute of Astronomy, (3) Subaru Telescope, 4), (4) Department of Astronomical Science, (5) Laboratoire d'Astrophysique, 6), (6) GEPI, (7) School of Physics, 8) ((1) Institute for Astronomy, (8) Research School of Astronomy, A. M. N. Ferguson (1), Astronomy, Astrophysics, Australia), Cambridge, C. Kobayashi (7, D. Crnojevi\\'c (1), Ecole Polytechnique F\\'ed\\'erale de Lausanne, E. J. Bernard (1), France, Graduate University for Advanced Studies, Hawaii, Japan, Mathematics, M. J. Irwin (2), N. Arimoto (3, National Astronomical Observatory of Japan, Observatoire de Paris, P. Jablonka (5, Royal Observatory, Switzerland, The Australian National University, Tokyo, UK, University of Edinburgh, University of Hertfordshire, USA","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-03-19T20:00:02Z","title":"The Outer Halo of the Nearest Giant Elliptical: A VLT/VIMOS Survey of the Resolved Stellar Populations in Centaurus A to 85 kpc"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.4736","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":"sha256:830f53d366491517cc0e1c4d422dc2615eae9ebf66e31435ed95e58c100ac644","target":"record","created_at":"2026-05-18T01:51:00Z","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":"1543356101ee300be2dfffa5411e26a887675b9f85e701d971aedaaf0340c655","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-03-19T20:00:02Z","title_canon_sha256":"e7d22c92d754b603693c7fadd634472068ed47faf84d5a3880278063f5c8fb81"},"schema_version":"1.0","source":{"id":"1303.4736","kind":"arxiv","version":1}},"canonical_sha256":"36adf595ef3d73efe5632bf4725824fc70d2a74b1a18b324d62b49ef6fc2e7ca","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"36adf595ef3d73efe5632bf4725824fc70d2a74b1a18b324d62b49ef6fc2e7ca","first_computed_at":"2026-05-18T01:51:00.591543Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:51:00.591543Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"e4dJVS+M5F5mFMa8y0LBeGu32kk63jGXvEy0IulfT+/vgUGED4bnJVHBUSFxh1r1YYH4/Gu1RKeUAu6xTzOJAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:51:00.592186Z","signed_message":"canonical_sha256_bytes"},"source_id":"1303.4736","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:830f53d366491517cc0e1c4d422dc2615eae9ebf66e31435ed95e58c100ac644","sha256:d551b80e4ec25bba502a54bbd9bed52c5dbcb0a67d89c7724a8bcb7586d5ccf2"],"state_sha256":"cacae02aa46fbaa95a27f38c3646a44e31d7f521f572e5a22a1e1a4a58c01566"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"F9906bNy/BdA9CIgSqcXdOJvm+ExHai2KcjnQgqkqg15U2pAGCXem2yYyClXkZDbw09B8wRlxUgD1H9nXaAnAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T18:53:03.362191Z","bundle_sha256":"959df0aecd29d74afbb1c3ce644307fbf90936bd94e4c58ad5e51061247607ba"}}