{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:HA7L3UBFUMEEQPORFSXJN4TVDV","short_pith_number":"pith:HA7L3UBF","canonical_record":{"source":{"id":"1712.00345","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-12-01T14:54:26Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"742f9de8ee4b734b2c5f5594182d24f8c5c803602232592a22f0781008b85bc1","abstract_canon_sha256":"38702d6c069a0966cabf31237f33c1596828147109f04b0c493acee368e76212"},"schema_version":"1.0"},"canonical_sha256":"383ebdd025a308483dd12cae96f2751d4b1afef47382c42bcb483188ce461dc2","source":{"kind":"arxiv","id":"1712.00345","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1712.00345","created_at":"2026-05-18T00:27:17Z"},{"alias_kind":"arxiv_version","alias_value":"1712.00345v1","created_at":"2026-05-18T00:27:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.00345","created_at":"2026-05-18T00:27:17Z"},{"alias_kind":"pith_short_12","alias_value":"HA7L3UBFUMEE","created_at":"2026-05-18T12:31:18Z"},{"alias_kind":"pith_short_16","alias_value":"HA7L3UBFUMEEQPOR","created_at":"2026-05-18T12:31:18Z"},{"alias_kind":"pith_short_8","alias_value":"HA7L3UBF","created_at":"2026-05-18T12:31:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:HA7L3UBFUMEEQPORFSXJN4TVDV","target":"record","payload":{"canonical_record":{"source":{"id":"1712.00345","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-12-01T14:54:26Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"742f9de8ee4b734b2c5f5594182d24f8c5c803602232592a22f0781008b85bc1","abstract_canon_sha256":"38702d6c069a0966cabf31237f33c1596828147109f04b0c493acee368e76212"},"schema_version":"1.0"},"canonical_sha256":"383ebdd025a308483dd12cae96f2751d4b1afef47382c42bcb483188ce461dc2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:27:17.520212Z","signature_b64":"N7z8GaZ8BkbvFcwYQRuRjln9wcQx24vGfK11Amg2sVeWmFIDi9ZUFq08nurB/9G4jtLT9e07nIBVrxpFxptPDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"383ebdd025a308483dd12cae96f2751d4b1afef47382c42bcb483188ce461dc2","last_reissued_at":"2026-05-18T00:27:17.519752Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:27:17.519752Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1712.00345","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":"2026-05-18T00:27:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2mmGrf8ZuXQR8wqHRsBUB0nXBaCXZlvv8kOCS/qrVHCGhH+dL6OClRa4Fen49L2WEBV7j6K/A9WXm3iDaWsmAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T12:38:18.970005Z"},"content_sha256":"5ecf86e3f79ab08d0e728674202183c388df2b999ce83456fa9ccaaa015ae9de","schema_version":"1.0","event_id":"sha256:5ecf86e3f79ab08d0e728674202183c388df2b999ce83456fa9ccaaa015ae9de"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:HA7L3UBFUMEEQPORFSXJN4TVDV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A search for the presence of magnetic fields in the two Supergiant Fast X-ray Transients IGR J08408-4503 and IGR J11215-5952","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"A.F. Kholtygin, K. Postnov, L. Sidoli, M. Sch\\\"oller, P. Steinbrunner, S. Hubrig, S.P. Jarvinen","submitted_at":"2017-12-01T14:54:26Z","abstract_excerpt":"A significant fraction of high-mass X-ray binaries are supergiant fast X-ray transients (SFXTs). The prime model for the physics governing their X-ray behaviour suggests that the winds of donor OB supergiants are magnetized. To investigate if magnetic fields are indeed present in the optical counterparts of such systems, we acquired low-resolution spectropolarimetric observations of the two optically brightest SFXTs, IGR J08408-4503 and IGR J11215-5952 with the ESO FORS2 instrument during two different observing runs. No field detection at a significance level of 3sigma was achieved for IGR J0"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.00345","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":"2026-05-18T00:27:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ulNwvdZBUJgajbSljUsMG0GVwfwBX6ug0zYtFYR6RD4u9ZgZx/n7+MeaXGcMopOjgkMiHtogS/1rJBLZxniZCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T12:38:18.970547Z"},"content_sha256":"d25a819507be966e76282385390e15725644549a52ecfdfc2c2d15fcacedb843","schema_version":"1.0","event_id":"sha256:d25a819507be966e76282385390e15725644549a52ecfdfc2c2d15fcacedb843"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HA7L3UBFUMEEQPORFSXJN4TVDV/bundle.json","state_url":"https://pith.science/pith/HA7L3UBFUMEEQPORFSXJN4TVDV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HA7L3UBFUMEEQPORFSXJN4TVDV/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":"2026-05-27T12:38:18Z","links":{"resolver":"https://pith.science/pith/HA7L3UBFUMEEQPORFSXJN4TVDV","bundle":"https://pith.science/pith/HA7L3UBFUMEEQPORFSXJN4TVDV/bundle.json","state":"https://pith.science/pith/HA7L3UBFUMEEQPORFSXJN4TVDV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HA7L3UBFUMEEQPORFSXJN4TVDV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:HA7L3UBFUMEEQPORFSXJN4TVDV","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":"38702d6c069a0966cabf31237f33c1596828147109f04b0c493acee368e76212","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-12-01T14:54:26Z","title_canon_sha256":"742f9de8ee4b734b2c5f5594182d24f8c5c803602232592a22f0781008b85bc1"},"schema_version":"1.0","source":{"id":"1712.00345","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1712.00345","created_at":"2026-05-18T00:27:17Z"},{"alias_kind":"arxiv_version","alias_value":"1712.00345v1","created_at":"2026-05-18T00:27:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.00345","created_at":"2026-05-18T00:27:17Z"},{"alias_kind":"pith_short_12","alias_value":"HA7L3UBFUMEE","created_at":"2026-05-18T12:31:18Z"},{"alias_kind":"pith_short_16","alias_value":"HA7L3UBFUMEEQPOR","created_at":"2026-05-18T12:31:18Z"},{"alias_kind":"pith_short_8","alias_value":"HA7L3UBF","created_at":"2026-05-18T12:31:18Z"}],"graph_snapshots":[{"event_id":"sha256:d25a819507be966e76282385390e15725644549a52ecfdfc2c2d15fcacedb843","target":"graph","created_at":"2026-05-18T00:27:17Z","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":"A significant fraction of high-mass X-ray binaries are supergiant fast X-ray transients (SFXTs). The prime model for the physics governing their X-ray behaviour suggests that the winds of donor OB supergiants are magnetized. To investigate if magnetic fields are indeed present in the optical counterparts of such systems, we acquired low-resolution spectropolarimetric observations of the two optically brightest SFXTs, IGR J08408-4503 and IGR J11215-5952 with the ESO FORS2 instrument during two different observing runs. No field detection at a significance level of 3sigma was achieved for IGR J0","authors_text":"A.F. Kholtygin, K. Postnov, L. Sidoli, M. Sch\\\"oller, P. Steinbrunner, S. Hubrig, S.P. Jarvinen","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-12-01T14:54:26Z","title":"A search for the presence of magnetic fields in the two Supergiant Fast X-ray Transients IGR J08408-4503 and IGR J11215-5952"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.00345","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":"sha256:5ecf86e3f79ab08d0e728674202183c388df2b999ce83456fa9ccaaa015ae9de","target":"record","created_at":"2026-05-18T00:27:17Z","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":"38702d6c069a0966cabf31237f33c1596828147109f04b0c493acee368e76212","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-12-01T14:54:26Z","title_canon_sha256":"742f9de8ee4b734b2c5f5594182d24f8c5c803602232592a22f0781008b85bc1"},"schema_version":"1.0","source":{"id":"1712.00345","kind":"arxiv","version":1}},"canonical_sha256":"383ebdd025a308483dd12cae96f2751d4b1afef47382c42bcb483188ce461dc2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"383ebdd025a308483dd12cae96f2751d4b1afef47382c42bcb483188ce461dc2","first_computed_at":"2026-05-18T00:27:17.519752Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:27:17.519752Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"N7z8GaZ8BkbvFcwYQRuRjln9wcQx24vGfK11Amg2sVeWmFIDi9ZUFq08nurB/9G4jtLT9e07nIBVrxpFxptPDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:27:17.520212Z","signed_message":"canonical_sha256_bytes"},"source_id":"1712.00345","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5ecf86e3f79ab08d0e728674202183c388df2b999ce83456fa9ccaaa015ae9de","sha256:d25a819507be966e76282385390e15725644549a52ecfdfc2c2d15fcacedb843"],"state_sha256":"0e2dcf8a03ce656b9673774f9a49770f84e55abb13e70a432385611081113fe9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BBXVbdRm1Pq/FM5sjThaBAUT+Lve3nh2d0VV2q3xK3U8L9fLr2TF3raaNaWBMoyDM1wGTcGfdgi1Ll19xXHOBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T12:38:18.973391Z","bundle_sha256":"3f9f55a18b4102698c6ff791631ee13b67f7887c5d45638bd12b77d14b2c8178"}}