{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:2DK7V4QZOIOZVWLPLHJ4FLIAEF","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":"93fb67a671283bec8c515090f18daa4e177fd805f963de3c11499509b18faea9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2012-12-28T06:30:48Z","title_canon_sha256":"94a82b16d2bbffe33f5cc3693f609657da135a63127623e721fa635018841eb5"},"schema_version":"1.0","source":{"id":"1212.6472","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.6472","created_at":"2026-05-18T03:37:28Z"},{"alias_kind":"arxiv_version","alias_value":"1212.6472v1","created_at":"2026-05-18T03:37:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.6472","created_at":"2026-05-18T03:37:28Z"},{"alias_kind":"pith_short_12","alias_value":"2DK7V4QZOIOZ","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_16","alias_value":"2DK7V4QZOIOZVWLP","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_8","alias_value":"2DK7V4QZ","created_at":"2026-05-18T12:26:50Z"}],"graph_snapshots":[{"event_id":"sha256:d9d1ccdae193493affa5840285384627f715cc322d27c4fff629ddaeb72a0527","target":"graph","created_at":"2026-05-18T03:37:28Z","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 present here the design of a sensitive Compact Faraday-modulator (CFM) based optical magnetometer for imaging the distribution of weak local magnetic fields inside hysteretic magnetic materials. The system developed has a root mean square (rms) noise level of 50 mG.Hz-1/2 at a full frame rate of 1 frame per second with each frame being of size 512 x 512 pixels. By measuring the local magnetic field distribution in different superconducting samples we show that our magnetometer provides an order of magnitude improvement in the signal to noise (S/N) ratio at low fields as compared to ordinary","authors_text":"Debanjan Chowdhury, Pabitra Mandal, S. S. Banerjee, T. Tamegai","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2012-12-28T06:30:48Z","title":"High sensitivity differential Magneto-Optical Imaging with a compact Faradaymodulator"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.6472","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":"sha256:995658e322b31a54b38602d0065f08d03cd4d2e26eaa77e6a7c9d2e6a04c1732","target":"record","created_at":"2026-05-18T03:37:28Z","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":"93fb67a671283bec8c515090f18daa4e177fd805f963de3c11499509b18faea9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2012-12-28T06:30:48Z","title_canon_sha256":"94a82b16d2bbffe33f5cc3693f609657da135a63127623e721fa635018841eb5"},"schema_version":"1.0","source":{"id":"1212.6472","kind":"arxiv","version":1}},"canonical_sha256":"d0d5faf219721d9ad96f59d3c2ad00217e1e8bb6b1b44cbaa2140e684c38abe1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d0d5faf219721d9ad96f59d3c2ad00217e1e8bb6b1b44cbaa2140e684c38abe1","first_computed_at":"2026-05-18T03:37:28.657740Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:37:28.657740Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/Q5hq8cnnze+/mFs3xKGcUiLAHGqTb3lddIQZJDa6F/PGy8M54OSTFFH9IByja2Ez7Q6IzsiyXIpRfjIbCWoAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:37:28.658416Z","signed_message":"canonical_sha256_bytes"},"source_id":"1212.6472","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:995658e322b31a54b38602d0065f08d03cd4d2e26eaa77e6a7c9d2e6a04c1732","sha256:d9d1ccdae193493affa5840285384627f715cc322d27c4fff629ddaeb72a0527"],"state_sha256":"7ff2af67257aca726eb4c5ae485d1c1e53f1b5e819a47d22a88997658b7c718b"}