{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:LHZMM3HCTMY3P6NIZY6O5EANM4","short_pith_number":"pith:LHZMM3HC","canonical_record":{"source":{"id":"1307.0748","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-07-02T16:26:39Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"49dc00f91e062cab44438a15f297071bac44ade098416bba176a311f3e4b3040","abstract_canon_sha256":"fd842c6452ead17b87a6fb0760be53a1e3e749b775d1c862f079b0642be2dfdd"},"schema_version":"1.0"},"canonical_sha256":"59f2c66ce29b31b7f9a8ce3cee900d6719f13c8583ead8e8ecc7cb5ea99b2e54","source":{"kind":"arxiv","id":"1307.0748","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.0748","created_at":"2026-05-18T01:49:00Z"},{"alias_kind":"arxiv_version","alias_value":"1307.0748v1","created_at":"2026-05-18T01:49:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.0748","created_at":"2026-05-18T01:49:00Z"},{"alias_kind":"pith_short_12","alias_value":"LHZMM3HCTMY3","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_16","alias_value":"LHZMM3HCTMY3P6NI","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_8","alias_value":"LHZMM3HC","created_at":"2026-05-18T12:27:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:LHZMM3HCTMY3P6NIZY6O5EANM4","target":"record","payload":{"canonical_record":{"source":{"id":"1307.0748","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-07-02T16:26:39Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"49dc00f91e062cab44438a15f297071bac44ade098416bba176a311f3e4b3040","abstract_canon_sha256":"fd842c6452ead17b87a6fb0760be53a1e3e749b775d1c862f079b0642be2dfdd"},"schema_version":"1.0"},"canonical_sha256":"59f2c66ce29b31b7f9a8ce3cee900d6719f13c8583ead8e8ecc7cb5ea99b2e54","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:49:00.628994Z","signature_b64":"WK0OgiV453Fbd04QuL5yLkmx9iW7lUs4PGLdz8ffPSVMDmFT/PD2bBVoKVH7PAeCsqd4FfgvFhi9bK3g7JoOAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"59f2c66ce29b31b7f9a8ce3cee900d6719f13c8583ead8e8ecc7cb5ea99b2e54","last_reissued_at":"2026-05-18T01:49:00.628394Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:49:00.628394Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1307.0748","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":"2026-05-18T01:49:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JhS07jtjrHYn9yQq4kls2ZwIxXdZ0Pg5M/MuJJF4gJXraz4e6JyvV9zkwieFBf2bojdZ8lN8iVgpL2w64wq5CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T16:15:40.792794Z"},"content_sha256":"102374f22bbe85c683b02e0e6503ba877b81666950c0a20533c1f26ac1864dbd","schema_version":"1.0","event_id":"sha256:102374f22bbe85c683b02e0e6503ba877b81666950c0a20533c1f26ac1864dbd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:LHZMM3HCTMY3P6NIZY6O5EANM4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The kilo-second variability of X-ray sources in nearby galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.HE","authors_text":"Gulab Dewangan, Ranjeev Misra, Soma Mandal","submitted_at":"2013-07-02T16:26:39Z","abstract_excerpt":"Chandra observations of 17 nearby galaxies were analysed and 166 bright sources with X-ray counts > 100, were chosen for temporal analysis. Fractional root mean square variability amplitudes were estimated for lightcurves binned at ~ 4 ksec and of length ~ 40 ksec. While there are nine ultra-luminous X-ray sources (ULXs) with unabsorbed luminosity (in 0.3-8.0 keV band) L > 10^39 erg/s in the sample for which the fractional r.m.s variability is constrained to be < 10%, only two of them show variability. One of the variable ULXs exhibits a secular transition and has a ultra-soft spectrum with te"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.0748","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":"2026-05-18T01:49:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BrMNx8EmwRmYcVx4xlQzYGDxyH6Jdny0wYDO/igdQmudkYew7w4mnw/bXQyc+lKGOcBw0FyTo1jR53QJSpg6Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T16:15:40.793179Z"},"content_sha256":"d9bd340e143484b27cdc415151211ebffc873ed61f2bca23fe40bbc131c881bd","schema_version":"1.0","event_id":"sha256:d9bd340e143484b27cdc415151211ebffc873ed61f2bca23fe40bbc131c881bd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LHZMM3HCTMY3P6NIZY6O5EANM4/bundle.json","state_url":"https://pith.science/pith/LHZMM3HCTMY3P6NIZY6O5EANM4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LHZMM3HCTMY3P6NIZY6O5EANM4/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":"2026-06-27T16:15:40Z","links":{"resolver":"https://pith.science/pith/LHZMM3HCTMY3P6NIZY6O5EANM4","bundle":"https://pith.science/pith/LHZMM3HCTMY3P6NIZY6O5EANM4/bundle.json","state":"https://pith.science/pith/LHZMM3HCTMY3P6NIZY6O5EANM4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LHZMM3HCTMY3P6NIZY6O5EANM4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:LHZMM3HCTMY3P6NIZY6O5EANM4","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":"fd842c6452ead17b87a6fb0760be53a1e3e749b775d1c862f079b0642be2dfdd","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-07-02T16:26:39Z","title_canon_sha256":"49dc00f91e062cab44438a15f297071bac44ade098416bba176a311f3e4b3040"},"schema_version":"1.0","source":{"id":"1307.0748","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.0748","created_at":"2026-05-18T01:49:00Z"},{"alias_kind":"arxiv_version","alias_value":"1307.0748v1","created_at":"2026-05-18T01:49:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.0748","created_at":"2026-05-18T01:49:00Z"},{"alias_kind":"pith_short_12","alias_value":"LHZMM3HCTMY3","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_16","alias_value":"LHZMM3HCTMY3P6NI","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_8","alias_value":"LHZMM3HC","created_at":"2026-05-18T12:27:51Z"}],"graph_snapshots":[{"event_id":"sha256:d9bd340e143484b27cdc415151211ebffc873ed61f2bca23fe40bbc131c881bd","target":"graph","created_at":"2026-05-18T01:49:00Z","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":"Chandra observations of 17 nearby galaxies were analysed and 166 bright sources with X-ray counts > 100, were chosen for temporal analysis. Fractional root mean square variability amplitudes were estimated for lightcurves binned at ~ 4 ksec and of length ~ 40 ksec. While there are nine ultra-luminous X-ray sources (ULXs) with unabsorbed luminosity (in 0.3-8.0 keV band) L > 10^39 erg/s in the sample for which the fractional r.m.s variability is constrained to be < 10%, only two of them show variability. One of the variable ULXs exhibits a secular transition and has a ultra-soft spectrum with te","authors_text":"Gulab Dewangan, Ranjeev Misra, Soma Mandal","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-07-02T16:26:39Z","title":"The kilo-second variability of X-ray sources in nearby galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.0748","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":"sha256:102374f22bbe85c683b02e0e6503ba877b81666950c0a20533c1f26ac1864dbd","target":"record","created_at":"2026-05-18T01:49:00Z","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":"fd842c6452ead17b87a6fb0760be53a1e3e749b775d1c862f079b0642be2dfdd","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-07-02T16:26:39Z","title_canon_sha256":"49dc00f91e062cab44438a15f297071bac44ade098416bba176a311f3e4b3040"},"schema_version":"1.0","source":{"id":"1307.0748","kind":"arxiv","version":1}},"canonical_sha256":"59f2c66ce29b31b7f9a8ce3cee900d6719f13c8583ead8e8ecc7cb5ea99b2e54","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"59f2c66ce29b31b7f9a8ce3cee900d6719f13c8583ead8e8ecc7cb5ea99b2e54","first_computed_at":"2026-05-18T01:49:00.628394Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:49:00.628394Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WK0OgiV453Fbd04QuL5yLkmx9iW7lUs4PGLdz8ffPSVMDmFT/PD2bBVoKVH7PAeCsqd4FfgvFhi9bK3g7JoOAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:49:00.628994Z","signed_message":"canonical_sha256_bytes"},"source_id":"1307.0748","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:102374f22bbe85c683b02e0e6503ba877b81666950c0a20533c1f26ac1864dbd","sha256:d9bd340e143484b27cdc415151211ebffc873ed61f2bca23fe40bbc131c881bd"],"state_sha256":"990c64bc7ba2ba66d25c340661695a39720fd7d3b31ed27b1233956876762248"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5RzlbhIRcyzKqzsKx7k3JwTqnyu6RYrIgIQPM6EGsN4Q9frUt0l8aDA9+dPHReS0/cAnSh6jJ1PhXOiJoV0lBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-27T16:15:40.795163Z","bundle_sha256":"867980a493a93a03b8150b635ecd401b664ee935b672baa2c5c3f2882a8affed"}}