{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:5D6TLLEMHDXGIKM477JVIQW2KL","short_pith_number":"pith:5D6TLLEM","canonical_record":{"source":{"id":"2509.05181","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2025-09-05T15:28:18Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"07c3f667340389e3d5a5d09266d37c6b00db8ce8c67c7521de03946fea4f49ae","abstract_canon_sha256":"01a2c399592802bba1a7471f9434886c33ad50bb53300aa1f6ffeab1229255c9"},"schema_version":"1.0"},"canonical_sha256":"e8fd35ac8c38ee64299cffd35442da52dea745a3fbd093264b5c533be085db27","source":{"kind":"arxiv","id":"2509.05181","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2509.05181","created_at":"2026-07-05T12:05:37Z"},{"alias_kind":"arxiv_version","alias_value":"2509.05181v1","created_at":"2026-07-05T12:05:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2509.05181","created_at":"2026-07-05T12:05:37Z"},{"alias_kind":"pith_short_12","alias_value":"5D6TLLEMHDXG","created_at":"2026-07-05T12:05:37Z"},{"alias_kind":"pith_short_16","alias_value":"5D6TLLEMHDXGIKM4","created_at":"2026-07-05T12:05:37Z"},{"alias_kind":"pith_short_8","alias_value":"5D6TLLEM","created_at":"2026-07-05T12:05:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:5D6TLLEMHDXGIKM477JVIQW2KL","target":"record","payload":{"canonical_record":{"source":{"id":"2509.05181","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2025-09-05T15:28:18Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"07c3f667340389e3d5a5d09266d37c6b00db8ce8c67c7521de03946fea4f49ae","abstract_canon_sha256":"01a2c399592802bba1a7471f9434886c33ad50bb53300aa1f6ffeab1229255c9"},"schema_version":"1.0"},"canonical_sha256":"e8fd35ac8c38ee64299cffd35442da52dea745a3fbd093264b5c533be085db27","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T12:05:37.396753Z","signature_b64":"SAg3Tl/oJxHleVgCYIJ6YCp9ED9U9Ln2citBRnyRP4WwBOy05JsabGi00uKR9Ym9D+6FxYnEQkfZMIeFvPEVAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e8fd35ac8c38ee64299cffd35442da52dea745a3fbd093264b5c533be085db27","last_reissued_at":"2026-07-05T12:05:37.396259Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T12:05:37.396259Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2509.05181","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":"2026-07-05T12:05:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g83vMhnWc7W7JOU75kvwUY3/SsKGaipz4FARGl9RIH+XY5bIELwoxIj3G5+9aVVRxyDWp7LgLUtbbBVSwyieAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T16:02:37.563511Z"},"content_sha256":"632e2238b04ee0d6d4ef50b3b021bb0707927dcb97751880aac049e098e2effc","schema_version":"1.0","event_id":"sha256:632e2238b04ee0d6d4ef50b3b021bb0707927dcb97751880aac049e098e2effc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:5D6TLLEMHDXGIKM477JVIQW2KL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Extreme Negative Polarisation of New Interstellar Comet 3I/ATLAS","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.EP","authors_text":"Alberto Cellino, Antti Penttil\\\"a, Eric Maclennan, Galin Borisov, Grigori Fedorets, Karri Muinonen, Ludmilla Kolokolova, Maxime Devog\\`ele, Mikael Granvik, Olga Mu\\~noz, Philippe Bendjoya, Rosemary C. Dorsey, Simone Ieva, Stefano Bagnulo, Yuna G. Kwon, Zuri Gray","submitted_at":"2025-09-05T15:28:18Z","abstract_excerpt":"We present the first polarimetric observations of the third discovered interstellar object, 3I/ATLAS (C/2025 N1), obtained pre-perihelion with FORS2/VLT, ALFOSC/NOT, and FoReRo2/RCC, over a phase angle range of 7.7-22.4{\\deg}. This marks the second ever polarimetric study of an interstellar object, the first distinguishing 2I/Borisov from most Solar System comets by its higher positive polarisation. Our polarimetric measurements as a function of phase angle reveal that 3I is characterised by an deep and narrow negative polarisation branch, reaching a minimum value of -2.7% at phase angle 7{\\de"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2509.05181","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2509.05181/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T12:05:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0u/zeW1xl2W/TtkYrHCkO7PT5Hvjj8EYmXEguJD3cFrL5kQF7ON7pK/Y8PhoK5ksQWY5nEk/45d6sPNLqLbzDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T16:02:37.564042Z"},"content_sha256":"98035ba466056b8b2ed3054542d8ddaa6144b3339f4dcc89abddb1658ae5b19e","schema_version":"1.0","event_id":"sha256:98035ba466056b8b2ed3054542d8ddaa6144b3339f4dcc89abddb1658ae5b19e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5D6TLLEMHDXGIKM477JVIQW2KL/bundle.json","state_url":"https://pith.science/pith/5D6TLLEMHDXGIKM477JVIQW2KL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5D6TLLEMHDXGIKM477JVIQW2KL/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":"2026-08-06T16:02:37Z","links":{"resolver":"https://pith.science/pith/5D6TLLEMHDXGIKM477JVIQW2KL","bundle":"https://pith.science/pith/5D6TLLEMHDXGIKM477JVIQW2KL/bundle.json","state":"https://pith.science/pith/5D6TLLEMHDXGIKM477JVIQW2KL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5D6TLLEMHDXGIKM477JVIQW2KL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:5D6TLLEMHDXGIKM477JVIQW2KL","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":"01a2c399592802bba1a7471f9434886c33ad50bb53300aa1f6ffeab1229255c9","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2025-09-05T15:28:18Z","title_canon_sha256":"07c3f667340389e3d5a5d09266d37c6b00db8ce8c67c7521de03946fea4f49ae"},"schema_version":"1.0","source":{"id":"2509.05181","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2509.05181","created_at":"2026-07-05T12:05:37Z"},{"alias_kind":"arxiv_version","alias_value":"2509.05181v1","created_at":"2026-07-05T12:05:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2509.05181","created_at":"2026-07-05T12:05:37Z"},{"alias_kind":"pith_short_12","alias_value":"5D6TLLEMHDXG","created_at":"2026-07-05T12:05:37Z"},{"alias_kind":"pith_short_16","alias_value":"5D6TLLEMHDXGIKM4","created_at":"2026-07-05T12:05:37Z"},{"alias_kind":"pith_short_8","alias_value":"5D6TLLEM","created_at":"2026-07-05T12:05:37Z"}],"graph_snapshots":[{"event_id":"sha256:98035ba466056b8b2ed3054542d8ddaa6144b3339f4dcc89abddb1658ae5b19e","target":"graph","created_at":"2026-07-05T12:05:37Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2509.05181/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present the first polarimetric observations of the third discovered interstellar object, 3I/ATLAS (C/2025 N1), obtained pre-perihelion with FORS2/VLT, ALFOSC/NOT, and FoReRo2/RCC, over a phase angle range of 7.7-22.4{\\deg}. This marks the second ever polarimetric study of an interstellar object, the first distinguishing 2I/Borisov from most Solar System comets by its higher positive polarisation. Our polarimetric measurements as a function of phase angle reveal that 3I is characterised by an deep and narrow negative polarisation branch, reaching a minimum value of -2.7% at phase angle 7{\\de","authors_text":"Alberto Cellino, Antti Penttil\\\"a, Eric Maclennan, Galin Borisov, Grigori Fedorets, Karri Muinonen, Ludmilla Kolokolova, Maxime Devog\\`ele, Mikael Granvik, Olga Mu\\~noz, Philippe Bendjoya, Rosemary C. Dorsey, Simone Ieva, Stefano Bagnulo, Yuna G. Kwon, Zuri Gray","cross_cats":["astro-ph.GA"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2025-09-05T15:28:18Z","title":"Extreme Negative Polarisation of New Interstellar Comet 3I/ATLAS"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2509.05181","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":"sha256:632e2238b04ee0d6d4ef50b3b021bb0707927dcb97751880aac049e098e2effc","target":"record","created_at":"2026-07-05T12:05:37Z","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":"01a2c399592802bba1a7471f9434886c33ad50bb53300aa1f6ffeab1229255c9","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.EP","submitted_at":"2025-09-05T15:28:18Z","title_canon_sha256":"07c3f667340389e3d5a5d09266d37c6b00db8ce8c67c7521de03946fea4f49ae"},"schema_version":"1.0","source":{"id":"2509.05181","kind":"arxiv","version":1}},"canonical_sha256":"e8fd35ac8c38ee64299cffd35442da52dea745a3fbd093264b5c533be085db27","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e8fd35ac8c38ee64299cffd35442da52dea745a3fbd093264b5c533be085db27","first_computed_at":"2026-07-05T12:05:37.396259Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T12:05:37.396259Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SAg3Tl/oJxHleVgCYIJ6YCp9ED9U9Ln2citBRnyRP4WwBOy05JsabGi00uKR9Ym9D+6FxYnEQkfZMIeFvPEVAg==","signature_status":"signed_v1","signed_at":"2026-07-05T12:05:37.396753Z","signed_message":"canonical_sha256_bytes"},"source_id":"2509.05181","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:632e2238b04ee0d6d4ef50b3b021bb0707927dcb97751880aac049e098e2effc","sha256:98035ba466056b8b2ed3054542d8ddaa6144b3339f4dcc89abddb1658ae5b19e"],"state_sha256":"3b1dab80f4468fa1d31b2d4579890a91af31cd6e79475280998a80ede5175b01"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WugQa4nSYM5YtWIGGOt5rgBxHUnU72QtOJ6SMzNzKOGNiZgw0NYTA+ix0E4ob0mTJNmi5tqaUlW3HMxmQqRyCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T16:02:37.567733Z","bundle_sha256":"fe3d95d27555ad7113da4fdf08e80a1b9c52ce2949d51067397781e7f01407cd"}}