{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:TVIBU45TOIBWTZMHVNCMQF6DQJ","short_pith_number":"pith:TVIBU45T","canonical_record":{"source":{"id":"1204.0552","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-04-02T23:15:08Z","cross_cats_sorted":[],"title_canon_sha256":"858815b8a4e169854379d7d5eef1268e8134e8fa80022459914caa070f478c3f","abstract_canon_sha256":"9511936ce0187bfae867afc062282eaabf942c6d7fe8a5e8e6e87c38949236ba"},"schema_version":"1.0"},"canonical_sha256":"9d501a73b3720369e587ab44c817c382711bc88f503e7ffe6a878697b1e359ee","source":{"kind":"arxiv","id":"1204.0552","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1204.0552","created_at":"2026-05-18T01:57:57Z"},{"alias_kind":"arxiv_version","alias_value":"1204.0552v1","created_at":"2026-05-18T01:57:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1204.0552","created_at":"2026-05-18T01:57:57Z"},{"alias_kind":"pith_short_12","alias_value":"TVIBU45TOIBW","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_16","alias_value":"TVIBU45TOIBWTZMH","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_8","alias_value":"TVIBU45T","created_at":"2026-05-18T12:27:23Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:TVIBU45TOIBWTZMHVNCMQF6DQJ","target":"record","payload":{"canonical_record":{"source":{"id":"1204.0552","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-04-02T23:15:08Z","cross_cats_sorted":[],"title_canon_sha256":"858815b8a4e169854379d7d5eef1268e8134e8fa80022459914caa070f478c3f","abstract_canon_sha256":"9511936ce0187bfae867afc062282eaabf942c6d7fe8a5e8e6e87c38949236ba"},"schema_version":"1.0"},"canonical_sha256":"9d501a73b3720369e587ab44c817c382711bc88f503e7ffe6a878697b1e359ee","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:57:57.869484Z","signature_b64":"CvR4M6prdYrOPFwtTCVU4PbVDgV6d3GrspHwK2kWfoJ4/aG25WfMisyjo5d8X+dfeF8Y48Atc9dFk0QVt4/rAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9d501a73b3720369e587ab44c817c382711bc88f503e7ffe6a878697b1e359ee","last_reissued_at":"2026-05-18T01:57:57.869060Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:57:57.869060Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1204.0552","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":"2026-05-18T01:57:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L+1Qg1PVVmQOQQsyB7QbwPqZdc3rE6+xYwQfOZvT9BiYW14RmMNvtffIOiz5ZEqzS8es5qxFkS7Xod2XDXOJBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T10:25:27.299603Z"},"content_sha256":"458325b4d03b39213488df4174f6f208c3e52cbe8ff7c68d1f74e5159b266acb","schema_version":"1.0","event_id":"sha256:458325b4d03b39213488df4174f6f208c3e52cbe8ff7c68d1f74e5159b266acb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:TVIBU45TOIBWTZMHVNCMQF6DQJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An Examination of the X-ray Sources in the Globular Cluster NGC 6652","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"(2) Indiana University), A. Bahramian (1) ((1) University of Alberta, C. O. Heinke (1), H. N. Cohn (2), P. M. Lugger (2), W. S. Stacey (1)","submitted_at":"2012-04-02T23:15:08Z","abstract_excerpt":"We observed the globular cluster NGC 6652 with Chandra for 47.5 ks, detecting six known X-ray sources, as well as five previously undetected X-ray sources. Source A (XB 1832-330) is a well-known bright low-mass X-ray binary (LXMB). The second brightest source, B, has a spectrum that fits well to either a power-law model (Gamma ~ 1.3) or an absorbed hot gas emission model (kT ~ 34 keV). Its unabsorbed 0.5-10 keV luminosity (L_X = 1.6+-0.1*10^34 erg/s) is suggestive of a neutron star primary; however, Source B exhibits unusual variability for a LMXB, varying by over an order of magnitude on time"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.0552","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":"2026-05-18T01:57:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dBYw7mMb7fTacRkGH5kccRdfyRAQwlLDIelNR0TSPK4ATTrDVOn6Wb8IqVEjnz9jrJhwCzouJnFpuf2Xl2XADg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T10:25:27.299955Z"},"content_sha256":"994af6f61f4fcfcac44374b572ced2df0a1c9486a4159528f9b68252e8d90c4b","schema_version":"1.0","event_id":"sha256:994af6f61f4fcfcac44374b572ced2df0a1c9486a4159528f9b68252e8d90c4b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TVIBU45TOIBWTZMHVNCMQF6DQJ/bundle.json","state_url":"https://pith.science/pith/TVIBU45TOIBWTZMHVNCMQF6DQJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TVIBU45TOIBWTZMHVNCMQF6DQJ/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":"2026-06-01T10:25:27Z","links":{"resolver":"https://pith.science/pith/TVIBU45TOIBWTZMHVNCMQF6DQJ","bundle":"https://pith.science/pith/TVIBU45TOIBWTZMHVNCMQF6DQJ/bundle.json","state":"https://pith.science/pith/TVIBU45TOIBWTZMHVNCMQF6DQJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TVIBU45TOIBWTZMHVNCMQF6DQJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:TVIBU45TOIBWTZMHVNCMQF6DQJ","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":"9511936ce0187bfae867afc062282eaabf942c6d7fe8a5e8e6e87c38949236ba","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-04-02T23:15:08Z","title_canon_sha256":"858815b8a4e169854379d7d5eef1268e8134e8fa80022459914caa070f478c3f"},"schema_version":"1.0","source":{"id":"1204.0552","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1204.0552","created_at":"2026-05-18T01:57:57Z"},{"alias_kind":"arxiv_version","alias_value":"1204.0552v1","created_at":"2026-05-18T01:57:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1204.0552","created_at":"2026-05-18T01:57:57Z"},{"alias_kind":"pith_short_12","alias_value":"TVIBU45TOIBW","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_16","alias_value":"TVIBU45TOIBWTZMH","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_8","alias_value":"TVIBU45T","created_at":"2026-05-18T12:27:23Z"}],"graph_snapshots":[{"event_id":"sha256:994af6f61f4fcfcac44374b572ced2df0a1c9486a4159528f9b68252e8d90c4b","target":"graph","created_at":"2026-05-18T01:57:57Z","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":"We observed the globular cluster NGC 6652 with Chandra for 47.5 ks, detecting six known X-ray sources, as well as five previously undetected X-ray sources. Source A (XB 1832-330) is a well-known bright low-mass X-ray binary (LXMB). The second brightest source, B, has a spectrum that fits well to either a power-law model (Gamma ~ 1.3) or an absorbed hot gas emission model (kT ~ 34 keV). Its unabsorbed 0.5-10 keV luminosity (L_X = 1.6+-0.1*10^34 erg/s) is suggestive of a neutron star primary; however, Source B exhibits unusual variability for a LMXB, varying by over an order of magnitude on time","authors_text":"(2) Indiana University), A. Bahramian (1) ((1) University of Alberta, C. O. Heinke (1), H. N. Cohn (2), P. M. Lugger (2), W. S. Stacey (1)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-04-02T23:15:08Z","title":"An Examination of the X-ray Sources in the Globular Cluster NGC 6652"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.0552","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":"sha256:458325b4d03b39213488df4174f6f208c3e52cbe8ff7c68d1f74e5159b266acb","target":"record","created_at":"2026-05-18T01:57:57Z","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":"9511936ce0187bfae867afc062282eaabf942c6d7fe8a5e8e6e87c38949236ba","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-04-02T23:15:08Z","title_canon_sha256":"858815b8a4e169854379d7d5eef1268e8134e8fa80022459914caa070f478c3f"},"schema_version":"1.0","source":{"id":"1204.0552","kind":"arxiv","version":1}},"canonical_sha256":"9d501a73b3720369e587ab44c817c382711bc88f503e7ffe6a878697b1e359ee","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9d501a73b3720369e587ab44c817c382711bc88f503e7ffe6a878697b1e359ee","first_computed_at":"2026-05-18T01:57:57.869060Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:57:57.869060Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CvR4M6prdYrOPFwtTCVU4PbVDgV6d3GrspHwK2kWfoJ4/aG25WfMisyjo5d8X+dfeF8Y48Atc9dFk0QVt4/rAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:57:57.869484Z","signed_message":"canonical_sha256_bytes"},"source_id":"1204.0552","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:458325b4d03b39213488df4174f6f208c3e52cbe8ff7c68d1f74e5159b266acb","sha256:994af6f61f4fcfcac44374b572ced2df0a1c9486a4159528f9b68252e8d90c4b"],"state_sha256":"241c249eeca55ebb649627860117d0095bf27f1ca980a51623c6c8c9c8f61f25"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hrCRkReL4lWOqRuiboNAJYXgwHulb0pIWR3KmBIRs7fCo7ijHCdYp+joaEJ+z9eFK2AFET997A6qlA6SiifxBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T10:25:27.302057Z","bundle_sha256":"1bb9d8b7040b79835c97eae713f5b1a10e024de94e4a04c5321216d922a7e5e7"}}