{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:ZEVGK6KMGISKZDIQJQCM5AANMI","short_pith_number":"pith:ZEVGK6KM","canonical_record":{"source":{"id":"1507.03587","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-07-13T20:00:29Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"d6fbfb996bed4a1fa27957beccaacbcef39c6ca6bfdd9883e2b04049eac1af62","abstract_canon_sha256":"ba96f9d4472cde9c9383d769d775f69b3610155cbc934d7c4d64ccd2f5852124"},"schema_version":"1.0"},"canonical_sha256":"c92a65794c3224ac8d104c04ce800d622f72f6490222b17c01f6804fd574b78f","source":{"kind":"arxiv","id":"1507.03587","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.03587","created_at":"2026-05-18T01:35:44Z"},{"alias_kind":"arxiv_version","alias_value":"1507.03587v1","created_at":"2026-05-18T01:35:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.03587","created_at":"2026-05-18T01:35:44Z"},{"alias_kind":"pith_short_12","alias_value":"ZEVGK6KMGISK","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_16","alias_value":"ZEVGK6KMGISKZDIQ","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_8","alias_value":"ZEVGK6KM","created_at":"2026-05-18T12:29:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:ZEVGK6KMGISKZDIQJQCM5AANMI","target":"record","payload":{"canonical_record":{"source":{"id":"1507.03587","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-07-13T20:00:29Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"d6fbfb996bed4a1fa27957beccaacbcef39c6ca6bfdd9883e2b04049eac1af62","abstract_canon_sha256":"ba96f9d4472cde9c9383d769d775f69b3610155cbc934d7c4d64ccd2f5852124"},"schema_version":"1.0"},"canonical_sha256":"c92a65794c3224ac8d104c04ce800d622f72f6490222b17c01f6804fd574b78f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:35:44.563497Z","signature_b64":"ZPH9lzAkVWtyCC6HKscccrl19H1yTVmB4wVM0aJJdXxeGp71H7UZ9TkEQPHSuUL3u0ri2XkMmxP1rTYaFYgOCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c92a65794c3224ac8d104c04ce800d622f72f6490222b17c01f6804fd574b78f","last_reissued_at":"2026-05-18T01:35:44.563028Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:35:44.563028Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1507.03587","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":"2026-05-18T01:35:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sLtcK6kUmttbOGOmdzuS/pmRmNhk1YE75HNcP1A4JY+6hUa+LKb2s0fC/gfE9Jnh/Ijz+ZQ5sZH8HWhstXrKAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T23:41:10.950687Z"},"content_sha256":"004256e942c8d290718e5d74d7b72c974423d811f6fc7c3e044a7d4e469b0742","schema_version":"1.0","event_id":"sha256:004256e942c8d290718e5d74d7b72c974423d811f6fc7c3e044a7d4e469b0742"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:ZEVGK6KMGISKZDIQJQCM5AANMI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optical imaging polarimetry of the LkCa 15 protoplanetary disk with SPHERE ZIMPOL","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.EP","authors_text":"Antonio Garufi, Carsten Dominik, Christian Thalmann, Esther Buenzli, Francois M\\'enard, Gael Chauvin, Gijs D. Mulders, Hans Martin Schmid, Henning Avenhaus, Jarron Leisenring, Johan Olofsson, Joseph C. Carson, Markus Janson, Michael R. Meyer, Myriam Benisty, Sascha P. Quanz, Sergio Messina, Thomas Henning","submitted_at":"2015-07-13T20:00:29Z","abstract_excerpt":"We present the first optical (590--890 nm) imaging polarimetry observations of the pre-transitional protoplanetary disk around the young solar analog LkCa 15, addressing a number of open questions raised by previous studies. We detect the previously unseen far side of the disk gap, confirm the highly eccentric scattered-light gap shape that was postulated from near-infrared imaging, at odds with the symmetric gap inferred from millimeter interferometry. Furthermore, we resolve the inner disk for the first time and trace it out to 30 AU. This new source of scattered light may contribute to the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.03587","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":"2026-05-18T01:35:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ij7+AgesBONc08MxdXy6d79ZzWdkb6P7OJOcBTMcUYBnBMC48PvzTe2TehaBSBvr4FnwS0ENOe7gXys0hWVsCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T23:41:10.951117Z"},"content_sha256":"23bd9308ed430ef00b43639babed59d012b53dc2b96e1ebdc0ae2651019c6064","schema_version":"1.0","event_id":"sha256:23bd9308ed430ef00b43639babed59d012b53dc2b96e1ebdc0ae2651019c6064"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZEVGK6KMGISKZDIQJQCM5AANMI/bundle.json","state_url":"https://pith.science/pith/ZEVGK6KMGISKZDIQJQCM5AANMI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZEVGK6KMGISKZDIQJQCM5AANMI/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":"2026-05-25T23:41:10Z","links":{"resolver":"https://pith.science/pith/ZEVGK6KMGISKZDIQJQCM5AANMI","bundle":"https://pith.science/pith/ZEVGK6KMGISKZDIQJQCM5AANMI/bundle.json","state":"https://pith.science/pith/ZEVGK6KMGISKZDIQJQCM5AANMI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZEVGK6KMGISKZDIQJQCM5AANMI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:ZEVGK6KMGISKZDIQJQCM5AANMI","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":"ba96f9d4472cde9c9383d769d775f69b3610155cbc934d7c4d64ccd2f5852124","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-07-13T20:00:29Z","title_canon_sha256":"d6fbfb996bed4a1fa27957beccaacbcef39c6ca6bfdd9883e2b04049eac1af62"},"schema_version":"1.0","source":{"id":"1507.03587","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.03587","created_at":"2026-05-18T01:35:44Z"},{"alias_kind":"arxiv_version","alias_value":"1507.03587v1","created_at":"2026-05-18T01:35:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.03587","created_at":"2026-05-18T01:35:44Z"},{"alias_kind":"pith_short_12","alias_value":"ZEVGK6KMGISK","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_16","alias_value":"ZEVGK6KMGISKZDIQ","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_8","alias_value":"ZEVGK6KM","created_at":"2026-05-18T12:29:52Z"}],"graph_snapshots":[{"event_id":"sha256:23bd9308ed430ef00b43639babed59d012b53dc2b96e1ebdc0ae2651019c6064","target":"graph","created_at":"2026-05-18T01:35:44Z","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 first optical (590--890 nm) imaging polarimetry observations of the pre-transitional protoplanetary disk around the young solar analog LkCa 15, addressing a number of open questions raised by previous studies. We detect the previously unseen far side of the disk gap, confirm the highly eccentric scattered-light gap shape that was postulated from near-infrared imaging, at odds with the symmetric gap inferred from millimeter interferometry. Furthermore, we resolve the inner disk for the first time and trace it out to 30 AU. This new source of scattered light may contribute to the ","authors_text":"Antonio Garufi, Carsten Dominik, Christian Thalmann, Esther Buenzli, Francois M\\'enard, Gael Chauvin, Gijs D. Mulders, Hans Martin Schmid, Henning Avenhaus, Jarron Leisenring, Johan Olofsson, Joseph C. Carson, Markus Janson, Michael R. Meyer, Myriam Benisty, Sascha P. Quanz, Sergio Messina, Thomas Henning","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-07-13T20:00:29Z","title":"Optical imaging polarimetry of the LkCa 15 protoplanetary disk with SPHERE ZIMPOL"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.03587","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":"sha256:004256e942c8d290718e5d74d7b72c974423d811f6fc7c3e044a7d4e469b0742","target":"record","created_at":"2026-05-18T01:35:44Z","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":"ba96f9d4472cde9c9383d769d775f69b3610155cbc934d7c4d64ccd2f5852124","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2015-07-13T20:00:29Z","title_canon_sha256":"d6fbfb996bed4a1fa27957beccaacbcef39c6ca6bfdd9883e2b04049eac1af62"},"schema_version":"1.0","source":{"id":"1507.03587","kind":"arxiv","version":1}},"canonical_sha256":"c92a65794c3224ac8d104c04ce800d622f72f6490222b17c01f6804fd574b78f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c92a65794c3224ac8d104c04ce800d622f72f6490222b17c01f6804fd574b78f","first_computed_at":"2026-05-18T01:35:44.563028Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:35:44.563028Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZPH9lzAkVWtyCC6HKscccrl19H1yTVmB4wVM0aJJdXxeGp71H7UZ9TkEQPHSuUL3u0ri2XkMmxP1rTYaFYgOCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:35:44.563497Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.03587","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:004256e942c8d290718e5d74d7b72c974423d811f6fc7c3e044a7d4e469b0742","sha256:23bd9308ed430ef00b43639babed59d012b53dc2b96e1ebdc0ae2651019c6064"],"state_sha256":"bb9a6f667f39fc15afa435019f05d6534a6d0109bffdf758b452b5447312bd50"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"n9oCNzd7y35rmZkuU/msKecCI4xTJ8xSI1QgVCNcr1A3xny/Q8kWIGzMsIz/WZuVHpBZQ39G84tOvhB2fF4bBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T23:41:10.954274Z","bundle_sha256":"c0e3fd902606d81f68684f11773d9ae0c7723426e44a1e1223e598b2f609636b"}}