{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:OR33OA7WSC7AGLB2LBYDAUCAT3","short_pith_number":"pith:OR33OA7W","canonical_record":{"source":{"id":"1502.07361","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-02-25T21:00:34Z","cross_cats_sorted":[],"title_canon_sha256":"1715e907d819f9888234e40c172275dccf5289e8a76bd21b31c23da7953b2fd6","abstract_canon_sha256":"53713747f6d2d1c2ac333f768f03035367fa0173b0770243ae91816a50ebe9b6"},"schema_version":"1.0"},"canonical_sha256":"7477b703f690be032c3a58703050409ed8fd4d9224866163c584692fd879e0b0","source":{"kind":"arxiv","id":"1502.07361","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.07361","created_at":"2026-05-18T01:40:54Z"},{"alias_kind":"arxiv_version","alias_value":"1502.07361v1","created_at":"2026-05-18T01:40:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.07361","created_at":"2026-05-18T01:40:54Z"},{"alias_kind":"pith_short_12","alias_value":"OR33OA7WSC7A","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_16","alias_value":"OR33OA7WSC7AGLB2","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_8","alias_value":"OR33OA7W","created_at":"2026-05-18T12:29:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:OR33OA7WSC7AGLB2LBYDAUCAT3","target":"record","payload":{"canonical_record":{"source":{"id":"1502.07361","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-02-25T21:00:34Z","cross_cats_sorted":[],"title_canon_sha256":"1715e907d819f9888234e40c172275dccf5289e8a76bd21b31c23da7953b2fd6","abstract_canon_sha256":"53713747f6d2d1c2ac333f768f03035367fa0173b0770243ae91816a50ebe9b6"},"schema_version":"1.0"},"canonical_sha256":"7477b703f690be032c3a58703050409ed8fd4d9224866163c584692fd879e0b0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:40:54.417749Z","signature_b64":"ryDsrNblH37F5ZNoPcmCF4hkT6QBlv9XJlY+9QaBTbH2x6PAQRfhEfDDktKY9qHhUo3S+ni44TloNkKO3paZBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7477b703f690be032c3a58703050409ed8fd4d9224866163c584692fd879e0b0","last_reissued_at":"2026-05-18T01:40:54.416973Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:40:54.416973Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1502.07361","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":"2026-05-18T01:40:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mkuKkiX/GMMqrACzAwGesPLPOx4MdG7TkuIu7myoKUlC/G9OjjxqlZIYC0uto95ShROLO3L4KAl6KXpTCZ0LAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T08:47:23.055146Z"},"content_sha256":"3311f8d11ae720a629ae4538e92eab246fffae24b62bd63652a7c23ff7389456","schema_version":"1.0","event_id":"sha256:3311f8d11ae720a629ae4538e92eab246fffae24b62bd63652a7c23ff7389456"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:OR33OA7WSC7AGLB2LBYDAUCAT3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"WS1: one more new Galactic bona fide luminous blue variable","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A.Y. Kniazev, L.N. Berdnikov, V.V. Gvaramadze","submitted_at":"2015-02-25T21:00:34Z","abstract_excerpt":"In this Letter, we report the results of spectroscopic and photometric monitoring of the candidate luminous blue variable (LBV) WS1, which was discovered in 2011 through the detection of a mid-infrared circular shell and follow-up optical spectroscopy of its central star. Our monitoring showed that WS1 brightened in the B, V and I bands by more than 1 mag during the last three years, while its spectrum revealed dramatic changes during the same time period, indicating that the star became much cooler. The light curve of WS1 demonstrates that the brightness of this star has reached maximum in 20"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.07361","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":"2026-05-18T01:40:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gAo+O10gn2dqhRD60i3JsFhwWNYIXJjhRkdbWalWN5kvV2DrJL3UD1H055B6Kf1ZwZw3sG26yNprqDi8JV1tCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T08:47:23.055913Z"},"content_sha256":"6208c490a3ebf2fd009f41fa7b8773801b984cde20431a12b6529dad0dab6469","schema_version":"1.0","event_id":"sha256:6208c490a3ebf2fd009f41fa7b8773801b984cde20431a12b6529dad0dab6469"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OR33OA7WSC7AGLB2LBYDAUCAT3/bundle.json","state_url":"https://pith.science/pith/OR33OA7WSC7AGLB2LBYDAUCAT3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OR33OA7WSC7AGLB2LBYDAUCAT3/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":"2026-05-25T08:47:23Z","links":{"resolver":"https://pith.science/pith/OR33OA7WSC7AGLB2LBYDAUCAT3","bundle":"https://pith.science/pith/OR33OA7WSC7AGLB2LBYDAUCAT3/bundle.json","state":"https://pith.science/pith/OR33OA7WSC7AGLB2LBYDAUCAT3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OR33OA7WSC7AGLB2LBYDAUCAT3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:OR33OA7WSC7AGLB2LBYDAUCAT3","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":"53713747f6d2d1c2ac333f768f03035367fa0173b0770243ae91816a50ebe9b6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-02-25T21:00:34Z","title_canon_sha256":"1715e907d819f9888234e40c172275dccf5289e8a76bd21b31c23da7953b2fd6"},"schema_version":"1.0","source":{"id":"1502.07361","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.07361","created_at":"2026-05-18T01:40:54Z"},{"alias_kind":"arxiv_version","alias_value":"1502.07361v1","created_at":"2026-05-18T01:40:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.07361","created_at":"2026-05-18T01:40:54Z"},{"alias_kind":"pith_short_12","alias_value":"OR33OA7WSC7A","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_16","alias_value":"OR33OA7WSC7AGLB2","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_8","alias_value":"OR33OA7W","created_at":"2026-05-18T12:29:34Z"}],"graph_snapshots":[{"event_id":"sha256:6208c490a3ebf2fd009f41fa7b8773801b984cde20431a12b6529dad0dab6469","target":"graph","created_at":"2026-05-18T01:40:54Z","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":"In this Letter, we report the results of spectroscopic and photometric monitoring of the candidate luminous blue variable (LBV) WS1, which was discovered in 2011 through the detection of a mid-infrared circular shell and follow-up optical spectroscopy of its central star. Our monitoring showed that WS1 brightened in the B, V and I bands by more than 1 mag during the last three years, while its spectrum revealed dramatic changes during the same time period, indicating that the star became much cooler. The light curve of WS1 demonstrates that the brightness of this star has reached maximum in 20","authors_text":"A.Y. Kniazev, L.N. Berdnikov, V.V. Gvaramadze","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-02-25T21:00:34Z","title":"WS1: one more new Galactic bona fide luminous blue variable"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.07361","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":"sha256:3311f8d11ae720a629ae4538e92eab246fffae24b62bd63652a7c23ff7389456","target":"record","created_at":"2026-05-18T01:40:54Z","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":"53713747f6d2d1c2ac333f768f03035367fa0173b0770243ae91816a50ebe9b6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-02-25T21:00:34Z","title_canon_sha256":"1715e907d819f9888234e40c172275dccf5289e8a76bd21b31c23da7953b2fd6"},"schema_version":"1.0","source":{"id":"1502.07361","kind":"arxiv","version":1}},"canonical_sha256":"7477b703f690be032c3a58703050409ed8fd4d9224866163c584692fd879e0b0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7477b703f690be032c3a58703050409ed8fd4d9224866163c584692fd879e0b0","first_computed_at":"2026-05-18T01:40:54.416973Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:40:54.416973Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ryDsrNblH37F5ZNoPcmCF4hkT6QBlv9XJlY+9QaBTbH2x6PAQRfhEfDDktKY9qHhUo3S+ni44TloNkKO3paZBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:40:54.417749Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.07361","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3311f8d11ae720a629ae4538e92eab246fffae24b62bd63652a7c23ff7389456","sha256:6208c490a3ebf2fd009f41fa7b8773801b984cde20431a12b6529dad0dab6469"],"state_sha256":"5aed05ea9e79286cbff0fb9d30796258dbced6753757371eefdafeee0314feed"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PL86UWoiF2Qc4I9UvTELKnojCZORIc/08Jon7Z3jkP5u1Vw+/3UwHXb3J7sitfCkrdzzM1KhOH52bV7zNsq4BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T08:47:23.060763Z","bundle_sha256":"6860b1be86abd52a8fafad9ccac97e134819d1de1b2246a2bbb18a3fe591e8fb"}}