{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:AS2MLAWBY3P3ALKERGI6DNCW4W","short_pith_number":"pith:AS2MLAWB","canonical_record":{"source":{"id":"2006.00867","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-06-01T11:58:04Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"d1957e6790254e57ad3612b8ef9de72cdadd1d6699805b90424e86bd5a12d9e7","abstract_canon_sha256":"e4858a21b0947e23011b71e55505017a560ccbff51a8af29ecab059aac3b4d1d"},"schema_version":"1.0"},"canonical_sha256":"04b4c582c1c6dfb02d448991e1b456e58f9ffc214dcfdf436af5fc2a91933758","source":{"kind":"arxiv","id":"2006.00867","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2006.00867","created_at":"2026-07-05T01:21:03Z"},{"alias_kind":"arxiv_version","alias_value":"2006.00867v1","created_at":"2026-07-05T01:21:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2006.00867","created_at":"2026-07-05T01:21:03Z"},{"alias_kind":"pith_short_12","alias_value":"AS2MLAWBY3P3","created_at":"2026-07-05T01:21:03Z"},{"alias_kind":"pith_short_16","alias_value":"AS2MLAWBY3P3ALKE","created_at":"2026-07-05T01:21:03Z"},{"alias_kind":"pith_short_8","alias_value":"AS2MLAWB","created_at":"2026-07-05T01:21:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:AS2MLAWBY3P3ALKERGI6DNCW4W","target":"record","payload":{"canonical_record":{"source":{"id":"2006.00867","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-06-01T11:58:04Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"d1957e6790254e57ad3612b8ef9de72cdadd1d6699805b90424e86bd5a12d9e7","abstract_canon_sha256":"e4858a21b0947e23011b71e55505017a560ccbff51a8af29ecab059aac3b4d1d"},"schema_version":"1.0"},"canonical_sha256":"04b4c582c1c6dfb02d448991e1b456e58f9ffc214dcfdf436af5fc2a91933758","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:21:03.240516Z","signature_b64":"W8pc96LbUp2+2L9Jyp/V5mAUqdxq0hb2Is4R8Ke+JpohhNMUD1mQ8Blajo5vqlugU3lAs2FX3NOJDRellBtYDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"04b4c582c1c6dfb02d448991e1b456e58f9ffc214dcfdf436af5fc2a91933758","last_reissued_at":"2026-07-05T01:21:03.239995Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:21:03.239995Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2006.00867","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":"2026-07-05T01:21:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jsXndGkcomsxanrQz7q/I3J+j1RHjDInqSa13ixX0OVIi/sgwYVQdF47tQVih8/ac3pwjyzpCsQVCkIKWTZNCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-09T06:38:31.687162Z"},"content_sha256":"f75c0144e089d79218d4b04ffdd254ec12ea4d48e4907bda7f4f604c5fc90754","schema_version":"1.0","event_id":"sha256:f75c0144e089d79218d4b04ffdd254ec12ea4d48e4907bda7f4f604c5fc90754"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:AS2MLAWBY3P3ALKERGI6DNCW4W","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Megahertz emission of massive early-type stars in the Cygnus region","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"C. H. Ishwara-Chandra, Huib Intema, Mich\\\"ael De Becker, Natacha L. Isequilla, Paula Benaglia","submitted_at":"2020-06-01T11:58:04Z","abstract_excerpt":"Massive, early type stars have been detected as radio sources for many decades. Their thermal winds radiate free-free continuum and in binary systems hosting a colliding-wind region, non-thermal emission has also been detected. To date, the most abundant data have been collected from frequencies higher than 1 GHz. We present here the results obtained from observations at 325 and 610 MHz, carried out with the Giant Metrewave Radio Telescope, of all known Wolf-Rayet and O-type stars encompassed in area of ~15 sq degrees centred on the Cygnus region. We report on the detection of 11 massive stars"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2006.00867","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/2006.00867/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":"2026-07-05T01:21:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CbnGjWPvYJzXwXih5hgfL+f9rmQ2yBE3BegyB+bMUNgjxA0LqCVgjNxaPL2a1maCN3GmY3MRBNUWwIa92WNxAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-09T06:38:31.688206Z"},"content_sha256":"df3572bac7bce044986d088b0fe0c8061373fbdb30a8025c12552d8f1ec87ca7","schema_version":"1.0","event_id":"sha256:df3572bac7bce044986d088b0fe0c8061373fbdb30a8025c12552d8f1ec87ca7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AS2MLAWBY3P3ALKERGI6DNCW4W/bundle.json","state_url":"https://pith.science/pith/AS2MLAWBY3P3ALKERGI6DNCW4W/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AS2MLAWBY3P3ALKERGI6DNCW4W/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":"2026-07-09T06:38:31Z","links":{"resolver":"https://pith.science/pith/AS2MLAWBY3P3ALKERGI6DNCW4W","bundle":"https://pith.science/pith/AS2MLAWBY3P3ALKERGI6DNCW4W/bundle.json","state":"https://pith.science/pith/AS2MLAWBY3P3ALKERGI6DNCW4W/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AS2MLAWBY3P3ALKERGI6DNCW4W/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:AS2MLAWBY3P3ALKERGI6DNCW4W","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":"e4858a21b0947e23011b71e55505017a560ccbff51a8af29ecab059aac3b4d1d","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-06-01T11:58:04Z","title_canon_sha256":"d1957e6790254e57ad3612b8ef9de72cdadd1d6699805b90424e86bd5a12d9e7"},"schema_version":"1.0","source":{"id":"2006.00867","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2006.00867","created_at":"2026-07-05T01:21:03Z"},{"alias_kind":"arxiv_version","alias_value":"2006.00867v1","created_at":"2026-07-05T01:21:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2006.00867","created_at":"2026-07-05T01:21:03Z"},{"alias_kind":"pith_short_12","alias_value":"AS2MLAWBY3P3","created_at":"2026-07-05T01:21:03Z"},{"alias_kind":"pith_short_16","alias_value":"AS2MLAWBY3P3ALKE","created_at":"2026-07-05T01:21:03Z"},{"alias_kind":"pith_short_8","alias_value":"AS2MLAWB","created_at":"2026-07-05T01:21:03Z"}],"graph_snapshots":[{"event_id":"sha256:df3572bac7bce044986d088b0fe0c8061373fbdb30a8025c12552d8f1ec87ca7","target":"graph","created_at":"2026-07-05T01:21:03Z","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/2006.00867/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Massive, early type stars have been detected as radio sources for many decades. Their thermal winds radiate free-free continuum and in binary systems hosting a colliding-wind region, non-thermal emission has also been detected. To date, the most abundant data have been collected from frequencies higher than 1 GHz. We present here the results obtained from observations at 325 and 610 MHz, carried out with the Giant Metrewave Radio Telescope, of all known Wolf-Rayet and O-type stars encompassed in area of ~15 sq degrees centred on the Cygnus region. We report on the detection of 11 massive stars","authors_text":"C. H. Ishwara-Chandra, Huib Intema, Mich\\\"ael De Becker, Natacha L. Isequilla, Paula Benaglia","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-06-01T11:58:04Z","title":"Megahertz emission of massive early-type stars in the Cygnus region"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2006.00867","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:f75c0144e089d79218d4b04ffdd254ec12ea4d48e4907bda7f4f604c5fc90754","target":"record","created_at":"2026-07-05T01:21:03Z","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":"e4858a21b0947e23011b71e55505017a560ccbff51a8af29ecab059aac3b4d1d","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-06-01T11:58:04Z","title_canon_sha256":"d1957e6790254e57ad3612b8ef9de72cdadd1d6699805b90424e86bd5a12d9e7"},"schema_version":"1.0","source":{"id":"2006.00867","kind":"arxiv","version":1}},"canonical_sha256":"04b4c582c1c6dfb02d448991e1b456e58f9ffc214dcfdf436af5fc2a91933758","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"04b4c582c1c6dfb02d448991e1b456e58f9ffc214dcfdf436af5fc2a91933758","first_computed_at":"2026-07-05T01:21:03.239995Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:21:03.239995Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"W8pc96LbUp2+2L9Jyp/V5mAUqdxq0hb2Is4R8Ke+JpohhNMUD1mQ8Blajo5vqlugU3lAs2FX3NOJDRellBtYDg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:21:03.240516Z","signed_message":"canonical_sha256_bytes"},"source_id":"2006.00867","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f75c0144e089d79218d4b04ffdd254ec12ea4d48e4907bda7f4f604c5fc90754","sha256:df3572bac7bce044986d088b0fe0c8061373fbdb30a8025c12552d8f1ec87ca7"],"state_sha256":"e8cb506ecb7ade0bcef4b19b14010a195d16a36535d080c52b55842dda82a987"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7JshdxhqnyqXVcztPqJZ8mLgVu33LnIlGWSIy0CFLuW6E7ZaHs3e/vr5orBRHuPEzJwusGLWE9vD05IC68GBBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-09T06:38:31.691007Z","bundle_sha256":"35264017379ef77a578ac68703895e27f8a65df17d474ac6e4b895eb064d61a7"}}