{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:DG5FWZ5DMUKALAGSCWJQFFP5EZ","short_pith_number":"pith:DG5FWZ5D","canonical_record":{"source":{"id":"1508.00130","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-08-01T14:56:38Z","cross_cats_sorted":[],"title_canon_sha256":"8d5305abc219e54cb5e64ff1989787d2ec9a190a76c3c834ce29290833d40aab","abstract_canon_sha256":"f4386cf8194446774e4d04bfe602f8327406a06b2ed028627294cea177c95701"},"schema_version":"1.0"},"canonical_sha256":"19ba5b67a365140580d215930295fd26479efbc6aab88d3a021d527c06276180","source":{"kind":"arxiv","id":"1508.00130","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.00130","created_at":"2026-05-18T01:35:58Z"},{"alias_kind":"arxiv_version","alias_value":"1508.00130v1","created_at":"2026-05-18T01:35:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.00130","created_at":"2026-05-18T01:35:58Z"},{"alias_kind":"pith_short_12","alias_value":"DG5FWZ5DMUKA","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_16","alias_value":"DG5FWZ5DMUKALAGS","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_8","alias_value":"DG5FWZ5D","created_at":"2026-05-18T12:29:17Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:DG5FWZ5DMUKALAGSCWJQFFP5EZ","target":"record","payload":{"canonical_record":{"source":{"id":"1508.00130","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-08-01T14:56:38Z","cross_cats_sorted":[],"title_canon_sha256":"8d5305abc219e54cb5e64ff1989787d2ec9a190a76c3c834ce29290833d40aab","abstract_canon_sha256":"f4386cf8194446774e4d04bfe602f8327406a06b2ed028627294cea177c95701"},"schema_version":"1.0"},"canonical_sha256":"19ba5b67a365140580d215930295fd26479efbc6aab88d3a021d527c06276180","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:35:58.909638Z","signature_b64":"YqANJzt37n8tphLjipyf2ImpjwbgyRaphms0BNtLMhxUeoCclsX3GTohxTCe3Om/+HCRXth2kherZ6cm/E9XCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"19ba5b67a365140580d215930295fd26479efbc6aab88d3a021d527c06276180","last_reissued_at":"2026-05-18T01:35:58.909133Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:35:58.909133Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1508.00130","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":"2026-05-18T01:35:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KNrn5Ya0Wp0QU9V+l57jpLpR+NYRn/uI52tYwruerL67yVKVSfGOKs4l/uu4pN78wFO1HTr4TI1CGhPdpFtVBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T13:31:48.411974Z"},"content_sha256":"5a6496c50cca20ae1ad85dd9e47fba8d9ea4ea73d27f3a8195bca6d1a71b62f5","schema_version":"1.0","event_id":"sha256:5a6496c50cca20ae1ad85dd9e47fba8d9ea4ea73d27f3a8195bca6d1a71b62f5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:DG5FWZ5DMUKALAGSCWJQFFP5EZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the possibility of magnetic field detection on a microlensed source star","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Ahmad Mehrabi, Habib Khosroshahi, Hadi Rahmani","submitted_at":"2015-08-01T14:56:38Z","abstract_excerpt":"In a microlensing event, a large magnification occurs at caustic crossing and provides an opportunity to obtain a stronger signal associated with the object. In this paper we study the possibility of magnetic field detection in a microlensing event through the Zeeman effect. We follow the prescription introduced by \\citep{Robinson:1980} which analyses the spectrum of a star in a Fourier space to deconvolve other broadening mechanism from the actual Zeeman effect. First we study magnification contrast between source and spot in terms of spot size and then consider two distinct strategies using "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.00130","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":"2026-05-18T01:35:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"v0m5EZem+vCxkmK9ZX8WwAAIH7hC1pZCftWN/fbOY1YAoLPP/mlLbhUd4eROQxsFbTq2+ZYeojxzvyE9u7VeAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T13:31:48.412333Z"},"content_sha256":"77006602dba3e56447885d5ce2a122d639924d47b1e31d83949ecd92cf7a5fad","schema_version":"1.0","event_id":"sha256:77006602dba3e56447885d5ce2a122d639924d47b1e31d83949ecd92cf7a5fad"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DG5FWZ5DMUKALAGSCWJQFFP5EZ/bundle.json","state_url":"https://pith.science/pith/DG5FWZ5DMUKALAGSCWJQFFP5EZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DG5FWZ5DMUKALAGSCWJQFFP5EZ/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":"2026-05-28T13:31:48Z","links":{"resolver":"https://pith.science/pith/DG5FWZ5DMUKALAGSCWJQFFP5EZ","bundle":"https://pith.science/pith/DG5FWZ5DMUKALAGSCWJQFFP5EZ/bundle.json","state":"https://pith.science/pith/DG5FWZ5DMUKALAGSCWJQFFP5EZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DG5FWZ5DMUKALAGSCWJQFFP5EZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:DG5FWZ5DMUKALAGSCWJQFFP5EZ","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":"f4386cf8194446774e4d04bfe602f8327406a06b2ed028627294cea177c95701","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-08-01T14:56:38Z","title_canon_sha256":"8d5305abc219e54cb5e64ff1989787d2ec9a190a76c3c834ce29290833d40aab"},"schema_version":"1.0","source":{"id":"1508.00130","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.00130","created_at":"2026-05-18T01:35:58Z"},{"alias_kind":"arxiv_version","alias_value":"1508.00130v1","created_at":"2026-05-18T01:35:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.00130","created_at":"2026-05-18T01:35:58Z"},{"alias_kind":"pith_short_12","alias_value":"DG5FWZ5DMUKA","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_16","alias_value":"DG5FWZ5DMUKALAGS","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_8","alias_value":"DG5FWZ5D","created_at":"2026-05-18T12:29:17Z"}],"graph_snapshots":[{"event_id":"sha256:77006602dba3e56447885d5ce2a122d639924d47b1e31d83949ecd92cf7a5fad","target":"graph","created_at":"2026-05-18T01:35:58Z","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 a microlensing event, a large magnification occurs at caustic crossing and provides an opportunity to obtain a stronger signal associated with the object. In this paper we study the possibility of magnetic field detection in a microlensing event through the Zeeman effect. We follow the prescription introduced by \\citep{Robinson:1980} which analyses the spectrum of a star in a Fourier space to deconvolve other broadening mechanism from the actual Zeeman effect. First we study magnification contrast between source and spot in terms of spot size and then consider two distinct strategies using ","authors_text":"Ahmad Mehrabi, Habib Khosroshahi, Hadi Rahmani","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-08-01T14:56:38Z","title":"On the possibility of magnetic field detection on a microlensed source star"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.00130","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":"sha256:5a6496c50cca20ae1ad85dd9e47fba8d9ea4ea73d27f3a8195bca6d1a71b62f5","target":"record","created_at":"2026-05-18T01:35:58Z","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":"f4386cf8194446774e4d04bfe602f8327406a06b2ed028627294cea177c95701","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-08-01T14:56:38Z","title_canon_sha256":"8d5305abc219e54cb5e64ff1989787d2ec9a190a76c3c834ce29290833d40aab"},"schema_version":"1.0","source":{"id":"1508.00130","kind":"arxiv","version":1}},"canonical_sha256":"19ba5b67a365140580d215930295fd26479efbc6aab88d3a021d527c06276180","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"19ba5b67a365140580d215930295fd26479efbc6aab88d3a021d527c06276180","first_computed_at":"2026-05-18T01:35:58.909133Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:35:58.909133Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YqANJzt37n8tphLjipyf2ImpjwbgyRaphms0BNtLMhxUeoCclsX3GTohxTCe3Om/+HCRXth2kherZ6cm/E9XCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:35:58.909638Z","signed_message":"canonical_sha256_bytes"},"source_id":"1508.00130","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5a6496c50cca20ae1ad85dd9e47fba8d9ea4ea73d27f3a8195bca6d1a71b62f5","sha256:77006602dba3e56447885d5ce2a122d639924d47b1e31d83949ecd92cf7a5fad"],"state_sha256":"0c839214503906f9dce4fdd349410e79d410af05e70a7d163baebbc064197588"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0neB2RS6G+GSgp1rIvmr7MhtD/kO/zMINdR29vrAkZS2ZqDNb4pXDx8W3gdHWAlWLHfPpIyH+3bAzG8nrsr3CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T13:31:48.414256Z","bundle_sha256":"83b79d4e81caab4870f676c8e3eb6d1f7d373cfe067756a7b65e158649df1785"}}