{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:U5J3GIYBXC72KAVEOWMKU3THAN","short_pith_number":"pith:U5J3GIYB","canonical_record":{"source":{"id":"1109.4437","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-09-20T21:45:28Z","cross_cats_sorted":[],"title_canon_sha256":"f679bb36ab01e5d3d14d168392a12e4c38d762af68837ce7fc4b8b9511f1487f","abstract_canon_sha256":"d956047ebef5a0d881f85b96ee6962411da5fa05193beec1c955fad9ae88d4ca"},"schema_version":"1.0"},"canonical_sha256":"a753b32301b8bfa502a47598aa6e67037ebf23c783dc2b9295f5dfef15f0762c","source":{"kind":"arxiv","id":"1109.4437","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.4437","created_at":"2026-05-18T02:00:27Z"},{"alias_kind":"arxiv_version","alias_value":"1109.4437v1","created_at":"2026-05-18T02:00:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.4437","created_at":"2026-05-18T02:00:27Z"},{"alias_kind":"pith_short_12","alias_value":"U5J3GIYBXC72","created_at":"2026-05-18T12:26:42Z"},{"alias_kind":"pith_short_16","alias_value":"U5J3GIYBXC72KAVE","created_at":"2026-05-18T12:26:42Z"},{"alias_kind":"pith_short_8","alias_value":"U5J3GIYB","created_at":"2026-05-18T12:26:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:U5J3GIYBXC72KAVEOWMKU3THAN","target":"record","payload":{"canonical_record":{"source":{"id":"1109.4437","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-09-20T21:45:28Z","cross_cats_sorted":[],"title_canon_sha256":"f679bb36ab01e5d3d14d168392a12e4c38d762af68837ce7fc4b8b9511f1487f","abstract_canon_sha256":"d956047ebef5a0d881f85b96ee6962411da5fa05193beec1c955fad9ae88d4ca"},"schema_version":"1.0"},"canonical_sha256":"a753b32301b8bfa502a47598aa6e67037ebf23c783dc2b9295f5dfef15f0762c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:00:27.430437Z","signature_b64":"VHCssOxY1DEUkf3nfd6Rt+djJ/Gdd7rXy56i++ijZ/nfLUqEgHRPddbUeHR530EBFF5fRtALD1Mf1ZMDnoceDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a753b32301b8bfa502a47598aa6e67037ebf23c783dc2b9295f5dfef15f0762c","last_reissued_at":"2026-05-18T02:00:27.429717Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:00:27.429717Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1109.4437","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":"2026-05-18T02:00:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"l9iOAjDY7NLx6O0vX7u9mi2PtlcHDx0St4vkriW2/5NaVs+lgrbXi0/iPRxU/sfM7haPP5n7+tp0jpWQi+AoDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T22:46:58.037085Z"},"content_sha256":"2d9306d02051d2b83120d57002f600c2e64888b2c8e3fc30c880e065307b6316","schema_version":"1.0","event_id":"sha256:2d9306d02051d2b83120d57002f600c2e64888b2c8e3fc30c880e065307b6316"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:U5J3GIYBXC72KAVEOWMKU3THAN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Searching for the orbital period of the ultraluminous X-ray source NGC 1313 X-2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"D. Impiombato, F. Gris\\'e, L. Zampieri, R. Falomo, R. Soria","submitted_at":"2011-09-20T21:45:28Z","abstract_excerpt":"We analyzed the longest phase-connected photometric dataset available for NGC 1313 X-2, looking for the ~6 day modulation reported by Liu et al. (2009). The folded B band light curve shows a 6 day periodicity with a significance slightly larger than 3 sigma. The low statistical significance of this modulation, along with the lack of detection in the V band, make its identification uncertain."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.4437","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":"2026-05-18T02:00:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6Vt/MNzXOiEUuICc5N2B5zlgCGfuMlP1YssnNNh2FpE+Kf744ptTsoVOM7wzkEEvUWVxHc5sbhImniL4+y/8Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T22:46:58.037615Z"},"content_sha256":"49f53d9cc9308fa2bd3fbca131687af03b23f9217ea255da16ab8b0a77e3711b","schema_version":"1.0","event_id":"sha256:49f53d9cc9308fa2bd3fbca131687af03b23f9217ea255da16ab8b0a77e3711b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/U5J3GIYBXC72KAVEOWMKU3THAN/bundle.json","state_url":"https://pith.science/pith/U5J3GIYBXC72KAVEOWMKU3THAN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/U5J3GIYBXC72KAVEOWMKU3THAN/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":"2026-05-25T22:46:58Z","links":{"resolver":"https://pith.science/pith/U5J3GIYBXC72KAVEOWMKU3THAN","bundle":"https://pith.science/pith/U5J3GIYBXC72KAVEOWMKU3THAN/bundle.json","state":"https://pith.science/pith/U5J3GIYBXC72KAVEOWMKU3THAN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/U5J3GIYBXC72KAVEOWMKU3THAN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:U5J3GIYBXC72KAVEOWMKU3THAN","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":"d956047ebef5a0d881f85b96ee6962411da5fa05193beec1c955fad9ae88d4ca","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-09-20T21:45:28Z","title_canon_sha256":"f679bb36ab01e5d3d14d168392a12e4c38d762af68837ce7fc4b8b9511f1487f"},"schema_version":"1.0","source":{"id":"1109.4437","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.4437","created_at":"2026-05-18T02:00:27Z"},{"alias_kind":"arxiv_version","alias_value":"1109.4437v1","created_at":"2026-05-18T02:00:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.4437","created_at":"2026-05-18T02:00:27Z"},{"alias_kind":"pith_short_12","alias_value":"U5J3GIYBXC72","created_at":"2026-05-18T12:26:42Z"},{"alias_kind":"pith_short_16","alias_value":"U5J3GIYBXC72KAVE","created_at":"2026-05-18T12:26:42Z"},{"alias_kind":"pith_short_8","alias_value":"U5J3GIYB","created_at":"2026-05-18T12:26:42Z"}],"graph_snapshots":[{"event_id":"sha256:49f53d9cc9308fa2bd3fbca131687af03b23f9217ea255da16ab8b0a77e3711b","target":"graph","created_at":"2026-05-18T02:00:27Z","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 analyzed the longest phase-connected photometric dataset available for NGC 1313 X-2, looking for the ~6 day modulation reported by Liu et al. (2009). The folded B band light curve shows a 6 day periodicity with a significance slightly larger than 3 sigma. The low statistical significance of this modulation, along with the lack of detection in the V band, make its identification uncertain.","authors_text":"D. Impiombato, F. Gris\\'e, L. Zampieri, R. Falomo, R. Soria","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-09-20T21:45:28Z","title":"Searching for the orbital period of the ultraluminous X-ray source NGC 1313 X-2"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.4437","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":"sha256:2d9306d02051d2b83120d57002f600c2e64888b2c8e3fc30c880e065307b6316","target":"record","created_at":"2026-05-18T02:00:27Z","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":"d956047ebef5a0d881f85b96ee6962411da5fa05193beec1c955fad9ae88d4ca","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2011-09-20T21:45:28Z","title_canon_sha256":"f679bb36ab01e5d3d14d168392a12e4c38d762af68837ce7fc4b8b9511f1487f"},"schema_version":"1.0","source":{"id":"1109.4437","kind":"arxiv","version":1}},"canonical_sha256":"a753b32301b8bfa502a47598aa6e67037ebf23c783dc2b9295f5dfef15f0762c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a753b32301b8bfa502a47598aa6e67037ebf23c783dc2b9295f5dfef15f0762c","first_computed_at":"2026-05-18T02:00:27.429717Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:00:27.429717Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VHCssOxY1DEUkf3nfd6Rt+djJ/Gdd7rXy56i++ijZ/nfLUqEgHRPddbUeHR530EBFF5fRtALD1Mf1ZMDnoceDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:00:27.430437Z","signed_message":"canonical_sha256_bytes"},"source_id":"1109.4437","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2d9306d02051d2b83120d57002f600c2e64888b2c8e3fc30c880e065307b6316","sha256:49f53d9cc9308fa2bd3fbca131687af03b23f9217ea255da16ab8b0a77e3711b"],"state_sha256":"14d0e83e89b79fd4ae7998615fe8a4bb8dd3320eb4abf1ce9475ebae7944c18b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ydm8OyCfUWcdDowUFKf165cXYv7bktqBNmBXgzk7M6bJ+Od2+c48aePlS7TfGerBhQB58t/hug9q+i1LfnkTDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T22:46:58.040212Z","bundle_sha256":"fe183064e2c9dd4fc38d2add93cf1158f90ba843e158b99e6f3165fc75cea4e4"}}