{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:KJR6MTNPY4OIWFM2JSQUNCLSQA","short_pith_number":"pith:KJR6MTNP","canonical_record":{"source":{"id":"1607.00447","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-07-02T01:40:13Z","cross_cats_sorted":[],"title_canon_sha256":"3a079c9f7dacb4abfa9237bf74973ac4b89df33199ac56c3d6a567b1e4887c98","abstract_canon_sha256":"4caa416355b59c735f22db6cf2708786c6b68b9e21b7f5d180a1c34aa086d893"},"schema_version":"1.0"},"canonical_sha256":"5263e64dafc71c8b159a4ca1468972802673fc96aed8f6312f2d78058c495c28","source":{"kind":"arxiv","id":"1607.00447","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.00447","created_at":"2026-05-18T00:48:17Z"},{"alias_kind":"arxiv_version","alias_value":"1607.00447v1","created_at":"2026-05-18T00:48:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.00447","created_at":"2026-05-18T00:48:17Z"},{"alias_kind":"pith_short_12","alias_value":"KJR6MTNPY4OI","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_16","alias_value":"KJR6MTNPY4OIWFM2","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_8","alias_value":"KJR6MTNP","created_at":"2026-05-18T12:30:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:KJR6MTNPY4OIWFM2JSQUNCLSQA","target":"record","payload":{"canonical_record":{"source":{"id":"1607.00447","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-07-02T01:40:13Z","cross_cats_sorted":[],"title_canon_sha256":"3a079c9f7dacb4abfa9237bf74973ac4b89df33199ac56c3d6a567b1e4887c98","abstract_canon_sha256":"4caa416355b59c735f22db6cf2708786c6b68b9e21b7f5d180a1c34aa086d893"},"schema_version":"1.0"},"canonical_sha256":"5263e64dafc71c8b159a4ca1468972802673fc96aed8f6312f2d78058c495c28","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:48:17.533669Z","signature_b64":"OSsDrMauL5JfkoLlEDKXhSJWQN9KQa+uZVzT1/4EgPRU8vMEAQTYDziG5Fv1LP5PRAiWCgvhc9h1bS5gSQdjCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5263e64dafc71c8b159a4ca1468972802673fc96aed8f6312f2d78058c495c28","last_reissued_at":"2026-05-18T00:48:17.532961Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:48:17.532961Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1607.00447","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":"2026-05-18T00:48:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uQyNNDR4bxuKWm99+rnGOvhe4GFskMbHAj8LICgCa4BtFULD8DV5mFq9/tAdiynsPHvV32mteROHRx6glJAdDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T00:43:31.186234Z"},"content_sha256":"30f85b0dd272fab1a8c2df5f0bf206bc4ac65fbcf87db75f4ee1d47aeeb14438","schema_version":"1.0","event_id":"sha256:30f85b0dd272fab1a8c2df5f0bf206bc4ac65fbcf87db75f4ee1d47aeeb14438"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:KJR6MTNPY4OIWFM2JSQUNCLSQA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Extended stellar substructure surrounding the Bo\\\"otes I dwarf spheroidal galaxy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. D. Mackey, G. S. Da Costa, H. Jerjen, T. A. Roderick","submitted_at":"2016-07-02T01:40:13Z","abstract_excerpt":"We present deep stellar photometry of the Bo\\\"otes I dwarf spheroidal galaxy in g and i band filters, taken with the Dark Energy Camera at Cerro Tololo in Chile. Our analysis reveals a large, extended region of stellar substructure surrounding the dwarf, as well as a distinct over-density encroaching on its tidal radius. A radial profile of the Bo\\\"otes I stellar distribution shows a break radius indicating the presence of extra-tidal stars. These observations strongly suggest that Bo\\\"otes I is experiencing tidal disruption, although not as extreme as that exhibited by the Hercules dwarf sphe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.00447","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":"2026-05-18T00:48:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"17iYmFVezoIQg67X/1ADF8oB5b+fyMWW/6rDzn1OPojQZKNoDy0UDjHQuxBTJtG0oKGCnCoJW4FPWE17rqqEDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T00:43:31.186612Z"},"content_sha256":"e2b531087369ca79773af4dd773cb6ec1995e9bfd9f67875e0fc60cf64723276","schema_version":"1.0","event_id":"sha256:e2b531087369ca79773af4dd773cb6ec1995e9bfd9f67875e0fc60cf64723276"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KJR6MTNPY4OIWFM2JSQUNCLSQA/bundle.json","state_url":"https://pith.science/pith/KJR6MTNPY4OIWFM2JSQUNCLSQA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KJR6MTNPY4OIWFM2JSQUNCLSQA/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":"2026-05-26T00:43:31Z","links":{"resolver":"https://pith.science/pith/KJR6MTNPY4OIWFM2JSQUNCLSQA","bundle":"https://pith.science/pith/KJR6MTNPY4OIWFM2JSQUNCLSQA/bundle.json","state":"https://pith.science/pith/KJR6MTNPY4OIWFM2JSQUNCLSQA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KJR6MTNPY4OIWFM2JSQUNCLSQA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:KJR6MTNPY4OIWFM2JSQUNCLSQA","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":"4caa416355b59c735f22db6cf2708786c6b68b9e21b7f5d180a1c34aa086d893","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-07-02T01:40:13Z","title_canon_sha256":"3a079c9f7dacb4abfa9237bf74973ac4b89df33199ac56c3d6a567b1e4887c98"},"schema_version":"1.0","source":{"id":"1607.00447","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.00447","created_at":"2026-05-18T00:48:17Z"},{"alias_kind":"arxiv_version","alias_value":"1607.00447v1","created_at":"2026-05-18T00:48:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.00447","created_at":"2026-05-18T00:48:17Z"},{"alias_kind":"pith_short_12","alias_value":"KJR6MTNPY4OI","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_16","alias_value":"KJR6MTNPY4OIWFM2","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_8","alias_value":"KJR6MTNP","created_at":"2026-05-18T12:30:25Z"}],"graph_snapshots":[{"event_id":"sha256:e2b531087369ca79773af4dd773cb6ec1995e9bfd9f67875e0fc60cf64723276","target":"graph","created_at":"2026-05-18T00:48:17Z","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 deep stellar photometry of the Bo\\\"otes I dwarf spheroidal galaxy in g and i band filters, taken with the Dark Energy Camera at Cerro Tololo in Chile. Our analysis reveals a large, extended region of stellar substructure surrounding the dwarf, as well as a distinct over-density encroaching on its tidal radius. A radial profile of the Bo\\\"otes I stellar distribution shows a break radius indicating the presence of extra-tidal stars. These observations strongly suggest that Bo\\\"otes I is experiencing tidal disruption, although not as extreme as that exhibited by the Hercules dwarf sphe","authors_text":"A. D. Mackey, G. S. Da Costa, H. Jerjen, T. A. Roderick","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-07-02T01:40:13Z","title":"Extended stellar substructure surrounding the Bo\\\"otes I dwarf spheroidal galaxy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.00447","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":"sha256:30f85b0dd272fab1a8c2df5f0bf206bc4ac65fbcf87db75f4ee1d47aeeb14438","target":"record","created_at":"2026-05-18T00:48:17Z","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":"4caa416355b59c735f22db6cf2708786c6b68b9e21b7f5d180a1c34aa086d893","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-07-02T01:40:13Z","title_canon_sha256":"3a079c9f7dacb4abfa9237bf74973ac4b89df33199ac56c3d6a567b1e4887c98"},"schema_version":"1.0","source":{"id":"1607.00447","kind":"arxiv","version":1}},"canonical_sha256":"5263e64dafc71c8b159a4ca1468972802673fc96aed8f6312f2d78058c495c28","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5263e64dafc71c8b159a4ca1468972802673fc96aed8f6312f2d78058c495c28","first_computed_at":"2026-05-18T00:48:17.532961Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:48:17.532961Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OSsDrMauL5JfkoLlEDKXhSJWQN9KQa+uZVzT1/4EgPRU8vMEAQTYDziG5Fv1LP5PRAiWCgvhc9h1bS5gSQdjCg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:48:17.533669Z","signed_message":"canonical_sha256_bytes"},"source_id":"1607.00447","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:30f85b0dd272fab1a8c2df5f0bf206bc4ac65fbcf87db75f4ee1d47aeeb14438","sha256:e2b531087369ca79773af4dd773cb6ec1995e9bfd9f67875e0fc60cf64723276"],"state_sha256":"c1d1766c24bde3c6ec02ccd9c6ab91c2bb228ca167f7c069bd9a6c09a0bccc6c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7TD/DhKFH0AXZvvnoWPlXUZqe4Ukg5S4k8dceFZI6m4JvdsMd1T2TR9t5K+qdzjHwHFVV0R1o8WSXG9Gt3q+BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T00:43:31.189202Z","bundle_sha256":"b08c467d5ed4daa088a709e071648d31215945e9fa302b50434992560414c58d"}}