{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:C6PMWO24DJB5IJO7YWJUID7FJP","short_pith_number":"pith:C6PMWO24","canonical_record":{"source":{"id":"1503.09020","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-03-31T12:23:42Z","cross_cats_sorted":[],"title_canon_sha256":"d82c1030f60777f374af393b114b4e21a185be360d663aa93cf7155cc377df8c","abstract_canon_sha256":"5f70e7ac97f2d3a0b2041ea89b6e59c9de6317f6425960883d9f0ac29965ed32"},"schema_version":"1.0"},"canonical_sha256":"179ecb3b5c1a43d425dfc593440fe54be746644a55247024ac1ba93cd7823882","source":{"kind":"arxiv","id":"1503.09020","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.09020","created_at":"2026-05-18T02:19:51Z"},{"alias_kind":"arxiv_version","alias_value":"1503.09020v1","created_at":"2026-05-18T02:19:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.09020","created_at":"2026-05-18T02:19:51Z"},{"alias_kind":"pith_short_12","alias_value":"C6PMWO24DJB5","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"C6PMWO24DJB5IJO7","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"C6PMWO24","created_at":"2026-05-18T12:29:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:C6PMWO24DJB5IJO7YWJUID7FJP","target":"record","payload":{"canonical_record":{"source":{"id":"1503.09020","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-03-31T12:23:42Z","cross_cats_sorted":[],"title_canon_sha256":"d82c1030f60777f374af393b114b4e21a185be360d663aa93cf7155cc377df8c","abstract_canon_sha256":"5f70e7ac97f2d3a0b2041ea89b6e59c9de6317f6425960883d9f0ac29965ed32"},"schema_version":"1.0"},"canonical_sha256":"179ecb3b5c1a43d425dfc593440fe54be746644a55247024ac1ba93cd7823882","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:19:51.610761Z","signature_b64":"xcSdyN90t5iGG61VNIGCH04kmiEBWqYKMSjDmmcIbRo2GqB06VejDSkBdTH+4M7U2jC+jko//ypFNzKlZ9zoAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"179ecb3b5c1a43d425dfc593440fe54be746644a55247024ac1ba93cd7823882","last_reissued_at":"2026-05-18T02:19:51.610077Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:19:51.610077Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1503.09020","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":"2026-05-18T02:19:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rQf128rTuof3ooM0Kr/TW17r3nc74SIH+nrJj5OAnPTAq12g9U5GlBtlSdSK7Nm3HpeFkjGt7bwEYJEP4CZXBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T16:21:00.777310Z"},"content_sha256":"0482a38060683f5cc11517f9278db1261dbc3c8c2ab1cd7e40b9ebca54cf3f2f","schema_version":"1.0","event_id":"sha256:0482a38060683f5cc11517f9278db1261dbc3c8c2ab1cd7e40b9ebca54cf3f2f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:C6PMWO24DJB5IJO7YWJUID7FJP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"BeppoSAX observations of GRO J1744-28","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Santangelo, R. Doroshenko, S. Piraino, V. Doroshenko, V. Suleimanov","submitted_at":"2015-03-31T12:23:42Z","abstract_excerpt":"We present an analysis of BeppoSAX observations of the unique transient bursting X-ray pulsar GRO J1744-28. The observations took place in March 1997 during the decay phase of the outburst. We find that the persistent broadband X-ray continuum of the source is consistent with a cutoff power law typical for the accreting pulsars. We also detect the fluorescence iron line at 6.7 keV and an absorption feature at ~4.5 keV, which we interpret as a cyclotron line. The corresponding magnetic field strength in the line forming region is ~3.7 x 10^11 G. Neither line is detected in the spectra of the bu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.09020","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":"2026-05-18T02:19:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0CuPZF6pcB3vPjrKhciy9U57/VU+AsXpjS+NS+o2HDAKaFdY8teFUbrzbZcUeEz1WW4ci2n74K4EX8wfo3daCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T16:21:00.777690Z"},"content_sha256":"98196cff25b2f39b448bd778cd44f89338f5954f948978758f5b75db14f35db9","schema_version":"1.0","event_id":"sha256:98196cff25b2f39b448bd778cd44f89338f5954f948978758f5b75db14f35db9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/C6PMWO24DJB5IJO7YWJUID7FJP/bundle.json","state_url":"https://pith.science/pith/C6PMWO24DJB5IJO7YWJUID7FJP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/C6PMWO24DJB5IJO7YWJUID7FJP/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":"2026-05-20T16:21:00Z","links":{"resolver":"https://pith.science/pith/C6PMWO24DJB5IJO7YWJUID7FJP","bundle":"https://pith.science/pith/C6PMWO24DJB5IJO7YWJUID7FJP/bundle.json","state":"https://pith.science/pith/C6PMWO24DJB5IJO7YWJUID7FJP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/C6PMWO24DJB5IJO7YWJUID7FJP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:C6PMWO24DJB5IJO7YWJUID7FJP","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":"5f70e7ac97f2d3a0b2041ea89b6e59c9de6317f6425960883d9f0ac29965ed32","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-03-31T12:23:42Z","title_canon_sha256":"d82c1030f60777f374af393b114b4e21a185be360d663aa93cf7155cc377df8c"},"schema_version":"1.0","source":{"id":"1503.09020","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.09020","created_at":"2026-05-18T02:19:51Z"},{"alias_kind":"arxiv_version","alias_value":"1503.09020v1","created_at":"2026-05-18T02:19:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.09020","created_at":"2026-05-18T02:19:51Z"},{"alias_kind":"pith_short_12","alias_value":"C6PMWO24DJB5","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"C6PMWO24DJB5IJO7","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"C6PMWO24","created_at":"2026-05-18T12:29:14Z"}],"graph_snapshots":[{"event_id":"sha256:98196cff25b2f39b448bd778cd44f89338f5954f948978758f5b75db14f35db9","target":"graph","created_at":"2026-05-18T02:19:51Z","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 an analysis of BeppoSAX observations of the unique transient bursting X-ray pulsar GRO J1744-28. The observations took place in March 1997 during the decay phase of the outburst. We find that the persistent broadband X-ray continuum of the source is consistent with a cutoff power law typical for the accreting pulsars. We also detect the fluorescence iron line at 6.7 keV and an absorption feature at ~4.5 keV, which we interpret as a cyclotron line. The corresponding magnetic field strength in the line forming region is ~3.7 x 10^11 G. Neither line is detected in the spectra of the bu","authors_text":"A. Santangelo, R. Doroshenko, S. Piraino, V. Doroshenko, V. Suleimanov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-03-31T12:23:42Z","title":"BeppoSAX observations of GRO J1744-28"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.09020","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":"sha256:0482a38060683f5cc11517f9278db1261dbc3c8c2ab1cd7e40b9ebca54cf3f2f","target":"record","created_at":"2026-05-18T02:19:51Z","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":"5f70e7ac97f2d3a0b2041ea89b6e59c9de6317f6425960883d9f0ac29965ed32","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-03-31T12:23:42Z","title_canon_sha256":"d82c1030f60777f374af393b114b4e21a185be360d663aa93cf7155cc377df8c"},"schema_version":"1.0","source":{"id":"1503.09020","kind":"arxiv","version":1}},"canonical_sha256":"179ecb3b5c1a43d425dfc593440fe54be746644a55247024ac1ba93cd7823882","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"179ecb3b5c1a43d425dfc593440fe54be746644a55247024ac1ba93cd7823882","first_computed_at":"2026-05-18T02:19:51.610077Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:19:51.610077Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xcSdyN90t5iGG61VNIGCH04kmiEBWqYKMSjDmmcIbRo2GqB06VejDSkBdTH+4M7U2jC+jko//ypFNzKlZ9zoAw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:19:51.610761Z","signed_message":"canonical_sha256_bytes"},"source_id":"1503.09020","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0482a38060683f5cc11517f9278db1261dbc3c8c2ab1cd7e40b9ebca54cf3f2f","sha256:98196cff25b2f39b448bd778cd44f89338f5954f948978758f5b75db14f35db9"],"state_sha256":"a3366d938f0bc171288f48a9f92760bba514719072f5c8df1ba142855b39dcdc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ttcJ8fgBqSeE4EbWb5PiPhLMVrW0qMAMFSK0MWCKol63RAMLFPwXRB8qEz6r1IEK8zae/EZJPgmTZ5q2PDARBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T16:21:00.779692Z","bundle_sha256":"acb7af3455f8bdf2ea65cb85f3db727fd28e72ec7011b089cf10ea71af9b5bba"}}