{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:P7G3XLGQGHEODF5CN2SDEIQBON","short_pith_number":"pith:P7G3XLGQ","canonical_record":{"source":{"id":"1405.6269","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-05-24T05:18:03Z","cross_cats_sorted":[],"title_canon_sha256":"e949ab292f04c26a8033cebb485a72333fa964449ebd82fefcda5fc4885b9816","abstract_canon_sha256":"687312a5011a7fc458243cc65fee3dd023f398ee0da9705e638e753dc11d9165"},"schema_version":"1.0"},"canonical_sha256":"7fcdbbacd031c8e197a26ea4322201737ddc10831a45e0eebbee4cb2cbb50c30","source":{"kind":"arxiv","id":"1405.6269","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1405.6269","created_at":"2026-05-18T02:51:00Z"},{"alias_kind":"arxiv_version","alias_value":"1405.6269v2","created_at":"2026-05-18T02:51:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1405.6269","created_at":"2026-05-18T02:51:00Z"},{"alias_kind":"pith_short_12","alias_value":"P7G3XLGQGHEO","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_16","alias_value":"P7G3XLGQGHEODF5C","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_8","alias_value":"P7G3XLGQ","created_at":"2026-05-18T12:28:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:P7G3XLGQGHEODF5CN2SDEIQBON","target":"record","payload":{"canonical_record":{"source":{"id":"1405.6269","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-05-24T05:18:03Z","cross_cats_sorted":[],"title_canon_sha256":"e949ab292f04c26a8033cebb485a72333fa964449ebd82fefcda5fc4885b9816","abstract_canon_sha256":"687312a5011a7fc458243cc65fee3dd023f398ee0da9705e638e753dc11d9165"},"schema_version":"1.0"},"canonical_sha256":"7fcdbbacd031c8e197a26ea4322201737ddc10831a45e0eebbee4cb2cbb50c30","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:51:00.492603Z","signature_b64":"7CPXAYG5oXRdk98diBg7XnOOA3McfQhqMVsw+R0Tnk4kAeqpTK8WLQYvVIfhFxd/0NDUU2wEMg+b+sv0Bz+BBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7fcdbbacd031c8e197a26ea4322201737ddc10831a45e0eebbee4cb2cbb50c30","last_reissued_at":"2026-05-18T02:51:00.492200Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:51:00.492200Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1405.6269","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:51:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5y2lnVIoQpEqGjExf0d6J+Nn1LEOuTb61AxaFwN+FNKvOu5+biJKNoY/RcUBnXLQuqldsC9m+zdJgVBIkZIdBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T05:26:59.028824Z"},"content_sha256":"e6a02b5ac15a0ecc1727f7bee3721178da561329d7ec2a1a2814293d5ef0994e","schema_version":"1.0","event_id":"sha256:e6a02b5ac15a0ecc1727f7bee3721178da561329d7ec2a1a2814293d5ef0994e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:P7G3XLGQGHEODF5CN2SDEIQBON","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Study of background star polarization and polarization efficiency of three selected Bok globules CB56, CB60 and CB69","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Chakraborty, D. Paul, H. S. Das","submitted_at":"2014-05-24T05:18:03Z","abstract_excerpt":"We present the polarization maps of three selected Bok globules CB56, CB60 and CB69 constructed using a V-band data from a CCD imaging polarimeter. The aim of this work is to measure the optical polarization ($p_v$) of background field stars in order to determine the polarization efficiency, $p_v/A_v$. We find that the local magnetic field of the cloud CB56 is almost aligned with the galactic field, but not in CB60 and CB69. A trend of decreasing polarization efficiency with increasing extinction ($A_v$) is observed: it can be well represented by a power law, $p_v/A_v \\propto A_v^{-\\alpha}$, w"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1405.6269","kind":"arxiv","version":2},"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":"2026-05-18T02:51:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Pk9RVLMXwqVXZ8IsEs9Y4hFm7zRN41sokHqY4CT0hziGCsNj38X9csjMEdiIdgTgYcy4IBR8D7ZxnH+rK6NlCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T05:26:59.029468Z"},"content_sha256":"b37d1f53761b784e7e32d8c3c8522d4c469c0d8eb1936f738b23399d44fd1ff0","schema_version":"1.0","event_id":"sha256:b37d1f53761b784e7e32d8c3c8522d4c469c0d8eb1936f738b23399d44fd1ff0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/P7G3XLGQGHEODF5CN2SDEIQBON/bundle.json","state_url":"https://pith.science/pith/P7G3XLGQGHEODF5CN2SDEIQBON/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/P7G3XLGQGHEODF5CN2SDEIQBON/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":"2026-06-07T05:26:59Z","links":{"resolver":"https://pith.science/pith/P7G3XLGQGHEODF5CN2SDEIQBON","bundle":"https://pith.science/pith/P7G3XLGQGHEODF5CN2SDEIQBON/bundle.json","state":"https://pith.science/pith/P7G3XLGQGHEODF5CN2SDEIQBON/state.json","well_known_bundle":"https://pith.science/.well-known/pith/P7G3XLGQGHEODF5CN2SDEIQBON/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:P7G3XLGQGHEODF5CN2SDEIQBON","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":"687312a5011a7fc458243cc65fee3dd023f398ee0da9705e638e753dc11d9165","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-05-24T05:18:03Z","title_canon_sha256":"e949ab292f04c26a8033cebb485a72333fa964449ebd82fefcda5fc4885b9816"},"schema_version":"1.0","source":{"id":"1405.6269","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1405.6269","created_at":"2026-05-18T02:51:00Z"},{"alias_kind":"arxiv_version","alias_value":"1405.6269v2","created_at":"2026-05-18T02:51:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1405.6269","created_at":"2026-05-18T02:51:00Z"},{"alias_kind":"pith_short_12","alias_value":"P7G3XLGQGHEO","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_16","alias_value":"P7G3XLGQGHEODF5C","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_8","alias_value":"P7G3XLGQ","created_at":"2026-05-18T12:28:43Z"}],"graph_snapshots":[{"event_id":"sha256:b37d1f53761b784e7e32d8c3c8522d4c469c0d8eb1936f738b23399d44fd1ff0","target":"graph","created_at":"2026-05-18T02:51:00Z","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 the polarization maps of three selected Bok globules CB56, CB60 and CB69 constructed using a V-band data from a CCD imaging polarimeter. The aim of this work is to measure the optical polarization ($p_v$) of background field stars in order to determine the polarization efficiency, $p_v/A_v$. We find that the local magnetic field of the cloud CB56 is almost aligned with the galactic field, but not in CB60 and CB69. A trend of decreasing polarization efficiency with increasing extinction ($A_v$) is observed: it can be well represented by a power law, $p_v/A_v \\propto A_v^{-\\alpha}$, w","authors_text":"A. Chakraborty, D. Paul, H. S. Das","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-05-24T05:18:03Z","title":"Study of background star polarization and polarization efficiency of three selected Bok globules CB56, CB60 and CB69"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1405.6269","kind":"arxiv","version":2},"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:e6a02b5ac15a0ecc1727f7bee3721178da561329d7ec2a1a2814293d5ef0994e","target":"record","created_at":"2026-05-18T02:51:00Z","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":"687312a5011a7fc458243cc65fee3dd023f398ee0da9705e638e753dc11d9165","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-05-24T05:18:03Z","title_canon_sha256":"e949ab292f04c26a8033cebb485a72333fa964449ebd82fefcda5fc4885b9816"},"schema_version":"1.0","source":{"id":"1405.6269","kind":"arxiv","version":2}},"canonical_sha256":"7fcdbbacd031c8e197a26ea4322201737ddc10831a45e0eebbee4cb2cbb50c30","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7fcdbbacd031c8e197a26ea4322201737ddc10831a45e0eebbee4cb2cbb50c30","first_computed_at":"2026-05-18T02:51:00.492200Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:51:00.492200Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7CPXAYG5oXRdk98diBg7XnOOA3McfQhqMVsw+R0Tnk4kAeqpTK8WLQYvVIfhFxd/0NDUU2wEMg+b+sv0Bz+BBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:51:00.492603Z","signed_message":"canonical_sha256_bytes"},"source_id":"1405.6269","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e6a02b5ac15a0ecc1727f7bee3721178da561329d7ec2a1a2814293d5ef0994e","sha256:b37d1f53761b784e7e32d8c3c8522d4c469c0d8eb1936f738b23399d44fd1ff0"],"state_sha256":"9f2d44fbee8655dc5ab126141b282655ebd4ce67d56d6b2ab9d47700aadc03ca"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mckEIvzcDK6tXI78f/nQBwm6R9EmqvqNN162rY3ab+ujrdDufLNKA1nvjqQgoftXlR4XRbvCwoEmL3VKvYNnDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T05:26:59.032893Z","bundle_sha256":"434298425e86d37626ade1af66e7a0104dbe46197f8c0207296c2569d2484c91"}}