{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:BYNHAJMVS33ALJZXCVZAH3JLNM","short_pith_number":"pith:BYNHAJMV","canonical_record":{"source":{"id":"1506.06142","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-06-19T20:01:40Z","cross_cats_sorted":[],"title_canon_sha256":"de2e011b7dbf55aad8fdb673968e5fef3d65934f5947b2dca6ded0bd4c80d28f","abstract_canon_sha256":"6750d793ddfa1cdf685ec58345a58065f990241d5a8217dc9f015e22e0fd3ac5"},"schema_version":"1.0"},"canonical_sha256":"0e1a70259596f605a737157203ed2b6b1e81bb5d51da18ddb8f049fa1fc1a544","source":{"kind":"arxiv","id":"1506.06142","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.06142","created_at":"2026-05-18T01:41:58Z"},{"alias_kind":"arxiv_version","alias_value":"1506.06142v1","created_at":"2026-05-18T01:41:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.06142","created_at":"2026-05-18T01:41:58Z"},{"alias_kind":"pith_short_12","alias_value":"BYNHAJMVS33A","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"BYNHAJMVS33ALJZX","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"BYNHAJMV","created_at":"2026-05-18T12:29:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:BYNHAJMVS33ALJZXCVZAH3JLNM","target":"record","payload":{"canonical_record":{"source":{"id":"1506.06142","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-06-19T20:01:40Z","cross_cats_sorted":[],"title_canon_sha256":"de2e011b7dbf55aad8fdb673968e5fef3d65934f5947b2dca6ded0bd4c80d28f","abstract_canon_sha256":"6750d793ddfa1cdf685ec58345a58065f990241d5a8217dc9f015e22e0fd3ac5"},"schema_version":"1.0"},"canonical_sha256":"0e1a70259596f605a737157203ed2b6b1e81bb5d51da18ddb8f049fa1fc1a544","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:41:58.636365Z","signature_b64":"jJ3r9MaBjIv28OSFdkBAL+llHHq7+asrc4u26GU+pXL5f4XoAOUrLUIqEibsK4LEtyLaw3aEN3jZKqPFgqVRCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0e1a70259596f605a737157203ed2b6b1e81bb5d51da18ddb8f049fa1fc1a544","last_reissued_at":"2026-05-18T01:41:58.635711Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:41:58.635711Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1506.06142","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":"2026-05-18T01:41:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ukcn0e6glIr60SanV2NxBE4LGa7aivw7mRkXsO5sgJ+t6kTbvWIcqNbX9Mkl9XMca3RPpGawpU1lvY/JMJbODQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T20:06:37.978895Z"},"content_sha256":"c72d81b758d9f796fffa680f9c990ad11fab737ff101af791942aeb8ffa9cb2c","schema_version":"1.0","event_id":"sha256:c72d81b758d9f796fffa680f9c990ad11fab737ff101af791942aeb8ffa9cb2c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:BYNHAJMVS33ALJZXCVZAH3JLNM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Lord of the Rings: A Kinematic Distance to Circinus X-1 from a Giant X-Ray Light Echo","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Catherine Braiding, Michael A. Nowak, Michael G. Burton, Norbert S. Schulz, Paul Sell, Peter G. Jonker, Robert P. Fender, Sebastian Heinz, William N. Brandt","submitted_at":"2015-06-19T20:01:40Z","abstract_excerpt":"Circinus X-1 exhibited a bright X-ray flare in late 2013. Follow-up observations with Chandra and XMM-Newton from 40 to 80 days after the flare reveal a bright X-ray light echo in the form of four well-defined rings with radii from 5 to 13 arcminutes, growing in radius with time. The large fluence of the flare and the large column density of interstellar dust towards Circinus X-1 make this the largest and brightest set of rings from an X-ray light echo observed to date. By deconvolving the radial intensity profile of the echo with the MAXI X-ray lightcurve of the flare we reconstruct the dust "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.06142","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":"2026-05-18T01:41:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zu38nmWJP90D5h8Qy69uTPa449+gQwCsKyKmtDvRd1Q9/cfyGGlSPMr2Byhj7DPvw/SrdXLopKXCbHAFdQxGBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T20:06:37.979520Z"},"content_sha256":"3e2150ac62503a8640525aff29ceccbd3637006bfc9f9f743e7863b9953b62c8","schema_version":"1.0","event_id":"sha256:3e2150ac62503a8640525aff29ceccbd3637006bfc9f9f743e7863b9953b62c8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BYNHAJMVS33ALJZXCVZAH3JLNM/bundle.json","state_url":"https://pith.science/pith/BYNHAJMVS33ALJZXCVZAH3JLNM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BYNHAJMVS33ALJZXCVZAH3JLNM/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":"2026-05-20T20:06:37Z","links":{"resolver":"https://pith.science/pith/BYNHAJMVS33ALJZXCVZAH3JLNM","bundle":"https://pith.science/pith/BYNHAJMVS33ALJZXCVZAH3JLNM/bundle.json","state":"https://pith.science/pith/BYNHAJMVS33ALJZXCVZAH3JLNM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BYNHAJMVS33ALJZXCVZAH3JLNM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:BYNHAJMVS33ALJZXCVZAH3JLNM","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":"6750d793ddfa1cdf685ec58345a58065f990241d5a8217dc9f015e22e0fd3ac5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-06-19T20:01:40Z","title_canon_sha256":"de2e011b7dbf55aad8fdb673968e5fef3d65934f5947b2dca6ded0bd4c80d28f"},"schema_version":"1.0","source":{"id":"1506.06142","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.06142","created_at":"2026-05-18T01:41:58Z"},{"alias_kind":"arxiv_version","alias_value":"1506.06142v1","created_at":"2026-05-18T01:41:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.06142","created_at":"2026-05-18T01:41:58Z"},{"alias_kind":"pith_short_12","alias_value":"BYNHAJMVS33A","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"BYNHAJMVS33ALJZX","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"BYNHAJMV","created_at":"2026-05-18T12:29:14Z"}],"graph_snapshots":[{"event_id":"sha256:3e2150ac62503a8640525aff29ceccbd3637006bfc9f9f743e7863b9953b62c8","target":"graph","created_at":"2026-05-18T01:41:58Z","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":"Circinus X-1 exhibited a bright X-ray flare in late 2013. Follow-up observations with Chandra and XMM-Newton from 40 to 80 days after the flare reveal a bright X-ray light echo in the form of four well-defined rings with radii from 5 to 13 arcminutes, growing in radius with time. The large fluence of the flare and the large column density of interstellar dust towards Circinus X-1 make this the largest and brightest set of rings from an X-ray light echo observed to date. By deconvolving the radial intensity profile of the echo with the MAXI X-ray lightcurve of the flare we reconstruct the dust ","authors_text":"Catherine Braiding, Michael A. Nowak, Michael G. Burton, Norbert S. Schulz, Paul Sell, Peter G. Jonker, Robert P. Fender, Sebastian Heinz, William N. Brandt","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-06-19T20:01:40Z","title":"Lord of the Rings: A Kinematic Distance to Circinus X-1 from a Giant X-Ray Light Echo"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.06142","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:c72d81b758d9f796fffa680f9c990ad11fab737ff101af791942aeb8ffa9cb2c","target":"record","created_at":"2026-05-18T01:41:58Z","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":"6750d793ddfa1cdf685ec58345a58065f990241d5a8217dc9f015e22e0fd3ac5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-06-19T20:01:40Z","title_canon_sha256":"de2e011b7dbf55aad8fdb673968e5fef3d65934f5947b2dca6ded0bd4c80d28f"},"schema_version":"1.0","source":{"id":"1506.06142","kind":"arxiv","version":1}},"canonical_sha256":"0e1a70259596f605a737157203ed2b6b1e81bb5d51da18ddb8f049fa1fc1a544","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0e1a70259596f605a737157203ed2b6b1e81bb5d51da18ddb8f049fa1fc1a544","first_computed_at":"2026-05-18T01:41:58.635711Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:41:58.635711Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jJ3r9MaBjIv28OSFdkBAL+llHHq7+asrc4u26GU+pXL5f4XoAOUrLUIqEibsK4LEtyLaw3aEN3jZKqPFgqVRCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:41:58.636365Z","signed_message":"canonical_sha256_bytes"},"source_id":"1506.06142","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c72d81b758d9f796fffa680f9c990ad11fab737ff101af791942aeb8ffa9cb2c","sha256:3e2150ac62503a8640525aff29ceccbd3637006bfc9f9f743e7863b9953b62c8"],"state_sha256":"5dd0e4de0a5d2c144bf1fcfb78ad76deede6c7c9e21e4a347b02318803b4b849"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WuWIfc7VNwwhPtoWUP/P1cfaPTxVMShAR7VnRD/jQ2gLwJkRwGh+l3MSeiFBf4aARFlkqfQvT/1O4pPliMpLAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T20:06:37.982836Z","bundle_sha256":"959158a69824c5723df4fb659195c5236be68659395248b097eb1caffa5d820e"}}