{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:W2HLFZCTVVAFOVNN5BUHQOQ6B2","short_pith_number":"pith:W2HLFZCT","canonical_record":{"source":{"id":"2606.04664","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-06-03T09:44:53Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"0cfc1fd1299c22327f175c4c25ac6db7303350913dc016c00f26ec901de60a57","abstract_canon_sha256":"8340988a26a183c74c973cd21dec0329f148573cbc098a4d80b6268602fe06bf"},"schema_version":"1.0"},"canonical_sha256":"b68eb2e453ad405755ade868783a1e0ea39a62d200ab23431e2b7d8f752bd8cf","source":{"kind":"arxiv","id":"2606.04664","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.04664","created_at":"2026-06-04T01:09:23Z"},{"alias_kind":"arxiv_version","alias_value":"2606.04664v1","created_at":"2026-06-04T01:09:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.04664","created_at":"2026-06-04T01:09:23Z"},{"alias_kind":"pith_short_12","alias_value":"W2HLFZCTVVAF","created_at":"2026-06-04T01:09:23Z"},{"alias_kind":"pith_short_16","alias_value":"W2HLFZCTVVAFOVNN","created_at":"2026-06-04T01:09:23Z"},{"alias_kind":"pith_short_8","alias_value":"W2HLFZCT","created_at":"2026-06-04T01:09:23Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:W2HLFZCTVVAFOVNN5BUHQOQ6B2","target":"record","payload":{"canonical_record":{"source":{"id":"2606.04664","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-06-03T09:44:53Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"0cfc1fd1299c22327f175c4c25ac6db7303350913dc016c00f26ec901de60a57","abstract_canon_sha256":"8340988a26a183c74c973cd21dec0329f148573cbc098a4d80b6268602fe06bf"},"schema_version":"1.0"},"canonical_sha256":"b68eb2e453ad405755ade868783a1e0ea39a62d200ab23431e2b7d8f752bd8cf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-04T01:09:23.971785Z","signature_b64":"+URev3/EcBl1YdTyye4sQX63grljTY4TU6IEXIoKwogYmoux+I99dKmwAxN+vQ/0pKcf+79V0QoTJANYOwDQDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b68eb2e453ad405755ade868783a1e0ea39a62d200ab23431e2b7d8f752bd8cf","last_reissued_at":"2026-06-04T01:09:23.971090Z","signature_status":"signed_v1","first_computed_at":"2026-06-04T01:09:23.971090Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.04664","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":"2026-06-04T01:09:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2Zj3lCoCXqj6AlxN8qOQdKyo5MJVmANeg5gux2ofl2Z/XoYDP4Scl34WeOJKZUYOpcq/RkWSF1WxscMd1dApCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T15:40:18.247797Z"},"content_sha256":"57c6abeb56b4293b06bd537de0d6250e947a20292bd4599c4bcf1a741b33b05d","schema_version":"1.0","event_id":"sha256:57c6abeb56b4293b06bd537de0d6250e947a20292bd4599c4bcf1a741b33b05d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:W2HLFZCTVVAFOVNN5BUHQOQ6B2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"NICER detection of a new candidate cyclotron line in the bursting X-ray pulsar GRO J1744-28","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"Alexander Mushtukov, Andrea Santangelo, Ce Cai, Hua Feng, Juri Poutanen, Lian Tao, Lingda Kong, Long Ji, Lorenzo Ducci, Mingyu Ge, Qi Liu, Sergey Tsygankov, Shuang-Nan Zhang, Shuwang Cui, Shu Zhang, Valery Suleimanov, Wei Wang, Xiaohang Dai","submitted_at":"2026-06-03T09:44:53Z","abstract_excerpt":"We report the detection of cyclotron resonant scattering features (CRSFs) in the spectrum of the unique bursting pulsar GRO J1744-28, observed during its recent outburst in 2021 with the Neutron Star Interior Composition Explorer (NICER). Clear pulsations at a frequency of 2.141128 Hz as well as Type II X-ray bursts were observed. The pulse profile exhibits a single-peaked shape in all energy bands, with the pulse fraction showing a positive correlation with energy. We find that the persistent X-ray continuum of the accreting pulsar is well described by typical phenomenological models, and we "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.04664","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2606.04664/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-06-04T01:09:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SZgCsDX7VQNr03nTQOA9C76xnlfdrUa+UlGS3qC+0Sa9x+qJCol8gJJiF5Ejl54vMeK48MtxZTgk8Rn4te1YCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T15:40:18.248554Z"},"content_sha256":"f55fcb21473d1c18ec6cad2acc709eb5323325eac2667ec590ae8214f3bbbb40","schema_version":"1.0","event_id":"sha256:f55fcb21473d1c18ec6cad2acc709eb5323325eac2667ec590ae8214f3bbbb40"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/W2HLFZCTVVAFOVNN5BUHQOQ6B2/bundle.json","state_url":"https://pith.science/pith/W2HLFZCTVVAFOVNN5BUHQOQ6B2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/W2HLFZCTVVAFOVNN5BUHQOQ6B2/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":"2026-06-06T15:40:18Z","links":{"resolver":"https://pith.science/pith/W2HLFZCTVVAFOVNN5BUHQOQ6B2","bundle":"https://pith.science/pith/W2HLFZCTVVAFOVNN5BUHQOQ6B2/bundle.json","state":"https://pith.science/pith/W2HLFZCTVVAFOVNN5BUHQOQ6B2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/W2HLFZCTVVAFOVNN5BUHQOQ6B2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:W2HLFZCTVVAFOVNN5BUHQOQ6B2","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":"8340988a26a183c74c973cd21dec0329f148573cbc098a4d80b6268602fe06bf","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-06-03T09:44:53Z","title_canon_sha256":"0cfc1fd1299c22327f175c4c25ac6db7303350913dc016c00f26ec901de60a57"},"schema_version":"1.0","source":{"id":"2606.04664","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.04664","created_at":"2026-06-04T01:09:23Z"},{"alias_kind":"arxiv_version","alias_value":"2606.04664v1","created_at":"2026-06-04T01:09:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.04664","created_at":"2026-06-04T01:09:23Z"},{"alias_kind":"pith_short_12","alias_value":"W2HLFZCTVVAF","created_at":"2026-06-04T01:09:23Z"},{"alias_kind":"pith_short_16","alias_value":"W2HLFZCTVVAFOVNN","created_at":"2026-06-04T01:09:23Z"},{"alias_kind":"pith_short_8","alias_value":"W2HLFZCT","created_at":"2026-06-04T01:09:23Z"}],"graph_snapshots":[{"event_id":"sha256:f55fcb21473d1c18ec6cad2acc709eb5323325eac2667ec590ae8214f3bbbb40","target":"graph","created_at":"2026-06-04T01:09:23Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2606.04664/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report the detection of cyclotron resonant scattering features (CRSFs) in the spectrum of the unique bursting pulsar GRO J1744-28, observed during its recent outburst in 2021 with the Neutron Star Interior Composition Explorer (NICER). Clear pulsations at a frequency of 2.141128 Hz as well as Type II X-ray bursts were observed. The pulse profile exhibits a single-peaked shape in all energy bands, with the pulse fraction showing a positive correlation with energy. We find that the persistent X-ray continuum of the accreting pulsar is well described by typical phenomenological models, and we ","authors_text":"Alexander Mushtukov, Andrea Santangelo, Ce Cai, Hua Feng, Juri Poutanen, Lian Tao, Lingda Kong, Long Ji, Lorenzo Ducci, Mingyu Ge, Qi Liu, Sergey Tsygankov, Shuang-Nan Zhang, Shuwang Cui, Shu Zhang, Valery Suleimanov, Wei Wang, Xiaohang Dai","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-06-03T09:44:53Z","title":"NICER detection of a new candidate cyclotron line in the bursting X-ray pulsar GRO J1744-28"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.04664","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":"sha256:57c6abeb56b4293b06bd537de0d6250e947a20292bd4599c4bcf1a741b33b05d","target":"record","created_at":"2026-06-04T01:09:23Z","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":"8340988a26a183c74c973cd21dec0329f148573cbc098a4d80b6268602fe06bf","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-06-03T09:44:53Z","title_canon_sha256":"0cfc1fd1299c22327f175c4c25ac6db7303350913dc016c00f26ec901de60a57"},"schema_version":"1.0","source":{"id":"2606.04664","kind":"arxiv","version":1}},"canonical_sha256":"b68eb2e453ad405755ade868783a1e0ea39a62d200ab23431e2b7d8f752bd8cf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b68eb2e453ad405755ade868783a1e0ea39a62d200ab23431e2b7d8f752bd8cf","first_computed_at":"2026-06-04T01:09:23.971090Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-04T01:09:23.971090Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+URev3/EcBl1YdTyye4sQX63grljTY4TU6IEXIoKwogYmoux+I99dKmwAxN+vQ/0pKcf+79V0QoTJANYOwDQDw==","signature_status":"signed_v1","signed_at":"2026-06-04T01:09:23.971785Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.04664","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:57c6abeb56b4293b06bd537de0d6250e947a20292bd4599c4bcf1a741b33b05d","sha256:f55fcb21473d1c18ec6cad2acc709eb5323325eac2667ec590ae8214f3bbbb40"],"state_sha256":"347f6093cd2fbf005b1cab752d586b15c147425f251cae47cd2c4b61d495f3de"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"02D68tUiEi63R7uAfB1zkxKuHuZKnDeUAjlrfGS0GJNzqWpr1I9Fg27e35YKTilhivoLV9EuHUaw/C0WXbLxCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T15:40:18.252456Z","bundle_sha256":"7e567f332aec20e3c16cc32912172fd21c084e6a62e6cb9718802cc7cbee51d4"}}