{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:WO45WXMHQQDLPNDA63UXFPR3JS","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":"e6be93a66cc1aea6a178026fb613957fb6b8844dac4e92008e0026d381cf88d3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-11-09T11:27:05Z","title_canon_sha256":"8914c5d86a95a26d8e18c86168edd51dbfe9645d9375dbafd33f54a27c61b89a"},"schema_version":"1.0","source":{"id":"1511.02641","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.02641","created_at":"2026-05-18T01:24:45Z"},{"alias_kind":"arxiv_version","alias_value":"1511.02641v1","created_at":"2026-05-18T01:24:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.02641","created_at":"2026-05-18T01:24:45Z"},{"alias_kind":"pith_short_12","alias_value":"WO45WXMHQQDL","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"WO45WXMHQQDLPNDA","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"WO45WXMH","created_at":"2026-05-18T12:29:47Z"}],"graph_snapshots":[{"event_id":"sha256:177f3b38aba2cc645e536759aac86c004bc7b17cab046c3c2be3d3e4fe8dbc55","target":"graph","created_at":"2026-05-18T01:24:45Z","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 report early optical linear polarization observations of two gamma-ray bursts made with the MASTER robotic telescope network. We found the minimum polar- ization for GRB150301B to be 8% at the beginning of the initial stage, whereas we detected no polarization for GRB150413A either at the rising branch or after the burst reached the power-law afterglow stage. This is the earliest measurement of the polarization (in cosmological rest frame) of gamma-ray bursts. The primary intent of the paper is to discover optical emission and publish extremely rare (unique) high- quality light curves of th","authors_text":"A. Gabovich, A. G. Tlatov, A. Kniazev, A. S. Kuznetsov, A. V. Parhomenko, C. Lopez, C. Mallamaci, C. Saffe, D. A. Kuvshinov, D. Buckley, D. V. Dormidontov, D. Vlasenko, E. Popova, E. S. Gorbovskoy, F. Podest, H. Levato, I. A. Gorbunov, I. S. Zalozhnich, K. I. Ivanov, M. Kotze, N. M. Budnev, N. V. Tyurina, O. A. Gress, P. V. Balanutsa, R. Alberto Castro-Tirado, R. Sanchez-Ramrez, S. A. Yazev, S. Potter, V. A. Senik, V. G. Kornilov, V. M. Lipunov, V. V. Chazov, V. V. Krushinski, V. V. Yurkov, Yu. P. Sergienko","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-11-09T11:27:05Z","title":"Early polarization observations of the optical emission of gamma-ray bursts: GRB150301B and GRB150413A"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.02641","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":"sha256:2dd5483cfaee46052aaff302571651ccb6238957bbe9ebf8918528953b62d09b","target":"record","created_at":"2026-05-18T01:24:45Z","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":"e6be93a66cc1aea6a178026fb613957fb6b8844dac4e92008e0026d381cf88d3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-11-09T11:27:05Z","title_canon_sha256":"8914c5d86a95a26d8e18c86168edd51dbfe9645d9375dbafd33f54a27c61b89a"},"schema_version":"1.0","source":{"id":"1511.02641","kind":"arxiv","version":1}},"canonical_sha256":"b3b9db5d878406b7b460f6e972be3b4ca0745f988c4f5de9c2536fc1d586594f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b3b9db5d878406b7b460f6e972be3b4ca0745f988c4f5de9c2536fc1d586594f","first_computed_at":"2026-05-18T01:24:45.698189Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:24:45.698189Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kFUMEYJLSImSfP/xzCF9HwmkUWKsy4GGCuBe8+J3LJjfATZ5Vl8qKrbv40kbJzbx2yAvNdrvXN6ZnCtGcqeZAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:24:45.698798Z","signed_message":"canonical_sha256_bytes"},"source_id":"1511.02641","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2dd5483cfaee46052aaff302571651ccb6238957bbe9ebf8918528953b62d09b","sha256:177f3b38aba2cc645e536759aac86c004bc7b17cab046c3c2be3d3e4fe8dbc55"],"state_sha256":"955971f4421587c77c1edb094f06470629908e30ff6464fbaf24e9aa99643764"}