{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:WZWUB4VR5MN6CRI3JZ3BW25XEK","short_pith_number":"pith:WZWUB4VR","canonical_record":{"source":{"id":"2109.00652","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-09-02T00:14:50Z","cross_cats_sorted":[],"title_canon_sha256":"e180cc433780523b4793a6a48e5ff1cd5bd8ab166bc98620a521a273b125ac9b","abstract_canon_sha256":"dceca203dc1f3aaf72f39f70a46752ca90e3268d5ca610a1b534e5335d66612b"},"schema_version":"1.0"},"canonical_sha256":"b66d40f2b1eb1be1451b4e761b6bb722b6a91a2d0596a2fab5d04fa19762f21f","source":{"kind":"arxiv","id":"2109.00652","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.00652","created_at":"2026-07-05T03:23:49Z"},{"alias_kind":"arxiv_version","alias_value":"2109.00652v1","created_at":"2026-07-05T03:23:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.00652","created_at":"2026-07-05T03:23:49Z"},{"alias_kind":"pith_short_12","alias_value":"WZWUB4VR5MN6","created_at":"2026-07-05T03:23:49Z"},{"alias_kind":"pith_short_16","alias_value":"WZWUB4VR5MN6CRI3","created_at":"2026-07-05T03:23:49Z"},{"alias_kind":"pith_short_8","alias_value":"WZWUB4VR","created_at":"2026-07-05T03:23:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:WZWUB4VR5MN6CRI3JZ3BW25XEK","target":"record","payload":{"canonical_record":{"source":{"id":"2109.00652","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-09-02T00:14:50Z","cross_cats_sorted":[],"title_canon_sha256":"e180cc433780523b4793a6a48e5ff1cd5bd8ab166bc98620a521a273b125ac9b","abstract_canon_sha256":"dceca203dc1f3aaf72f39f70a46752ca90e3268d5ca610a1b534e5335d66612b"},"schema_version":"1.0"},"canonical_sha256":"b66d40f2b1eb1be1451b4e761b6bb722b6a91a2d0596a2fab5d04fa19762f21f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:23:49.670195Z","signature_b64":"RztlzazSHRpHeNLYBCmI2fIUcQ7p/Em72kKmIP+ArlipMI2meFowOjFXFamSCHwIcG0qouCtqrjXhMCW9BdIDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b66d40f2b1eb1be1451b4e761b6bb722b6a91a2d0596a2fab5d04fa19762f21f","last_reissued_at":"2026-07-05T03:23:49.669784Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:23:49.669784Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2109.00652","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":"2026-07-05T03:23:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2snuKaZn0Q10iXVgtyZCODgUBmEQ3PZvaIRatpQ78qdiucZS5sLtI6u2FAebBSxcKCC9pYVhSPWgzJFBU6i5Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T03:19:29.839165Z"},"content_sha256":"74f709c46c61c9403b2bdff35111aaba0c9e67a459939bb9bba31000dad2cb57","schema_version":"1.0","event_id":"sha256:74f709c46c61c9403b2bdff35111aaba0c9e67a459939bb9bba31000dad2cb57"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:WZWUB4VR5MN6CRI3JZ3BW25XEK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Discovery of ASKAP J173608.2-321635 as a Highly-Polarized Transient Point Source with the Australian SKA Pathfinder","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Adam Stewart, Andrew O'Brien, Andrew Zic, B. M. Gaensler, B. W. Stappers, David L. Kaplan, Dougal Dobie, Emil Lenc, E. Tremou, Ewan Barr, George Heald, Gregory R. Sivakoff, James K. Leung, Joshua Pritchard, Nanda Rea, Patrick A. Woudt, Sergio Pintaldi, Shi Dai, Tara Murphy, Yuanming Wang, Ziteng Wang","submitted_at":"2021-09-02T00:14:50Z","abstract_excerpt":"We report the discovery of a highly-polarized, highly-variable, steep-spectrum radio source, ASKAP J173608.2-321635, located $\\sim$4\\,deg from the Galactic center in the Galactic plane. The source was detected six times between 2020 January and 2020 September as part of the Australian Square Kilometre Array Pathfinder Variables and Slow Transients (ASKAP VAST) survey at 888\\,MHz. It exhibited a high degree ($\\sim 25$\\%) of circular polarization when it was visible. We monitored the source with the MeerKAT telescope from 2020 November to 2021 February on a 2--4 week cadence. The source was not "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.00652","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/2109.00652/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":"2026-07-05T03:23:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ETtnRgq/fkbQyzU4fd2lfVlooiFWie38u9DwMruI9Ud8ogGR4D/zoIN3QUdHeOsPFR1HXj9tXrXqfFXWta0LBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T03:19:29.839625Z"},"content_sha256":"627ad76b139fbe0fe67361ac23fc1be547ce2ad9b34026afd413421dbe5c7195","schema_version":"1.0","event_id":"sha256:627ad76b139fbe0fe67361ac23fc1be547ce2ad9b34026afd413421dbe5c7195"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WZWUB4VR5MN6CRI3JZ3BW25XEK/bundle.json","state_url":"https://pith.science/pith/WZWUB4VR5MN6CRI3JZ3BW25XEK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WZWUB4VR5MN6CRI3JZ3BW25XEK/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":"2026-08-23T03:19:29Z","links":{"resolver":"https://pith.science/pith/WZWUB4VR5MN6CRI3JZ3BW25XEK","bundle":"https://pith.science/pith/WZWUB4VR5MN6CRI3JZ3BW25XEK/bundle.json","state":"https://pith.science/pith/WZWUB4VR5MN6CRI3JZ3BW25XEK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WZWUB4VR5MN6CRI3JZ3BW25XEK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:WZWUB4VR5MN6CRI3JZ3BW25XEK","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":"dceca203dc1f3aaf72f39f70a46752ca90e3268d5ca610a1b534e5335d66612b","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-09-02T00:14:50Z","title_canon_sha256":"e180cc433780523b4793a6a48e5ff1cd5bd8ab166bc98620a521a273b125ac9b"},"schema_version":"1.0","source":{"id":"2109.00652","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.00652","created_at":"2026-07-05T03:23:49Z"},{"alias_kind":"arxiv_version","alias_value":"2109.00652v1","created_at":"2026-07-05T03:23:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.00652","created_at":"2026-07-05T03:23:49Z"},{"alias_kind":"pith_short_12","alias_value":"WZWUB4VR5MN6","created_at":"2026-07-05T03:23:49Z"},{"alias_kind":"pith_short_16","alias_value":"WZWUB4VR5MN6CRI3","created_at":"2026-07-05T03:23:49Z"},{"alias_kind":"pith_short_8","alias_value":"WZWUB4VR","created_at":"2026-07-05T03:23:49Z"}],"graph_snapshots":[{"event_id":"sha256:627ad76b139fbe0fe67361ac23fc1be547ce2ad9b34026afd413421dbe5c7195","target":"graph","created_at":"2026-07-05T03:23:49Z","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/2109.00652/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report the discovery of a highly-polarized, highly-variable, steep-spectrum radio source, ASKAP J173608.2-321635, located $\\sim$4\\,deg from the Galactic center in the Galactic plane. The source was detected six times between 2020 January and 2020 September as part of the Australian Square Kilometre Array Pathfinder Variables and Slow Transients (ASKAP VAST) survey at 888\\,MHz. It exhibited a high degree ($\\sim 25$\\%) of circular polarization when it was visible. We monitored the source with the MeerKAT telescope from 2020 November to 2021 February on a 2--4 week cadence. The source was not ","authors_text":"Adam Stewart, Andrew O'Brien, Andrew Zic, B. M. Gaensler, B. W. Stappers, David L. Kaplan, Dougal Dobie, Emil Lenc, E. Tremou, Ewan Barr, George Heald, Gregory R. Sivakoff, James K. Leung, Joshua Pritchard, Nanda Rea, Patrick A. Woudt, Sergio Pintaldi, Shi Dai, Tara Murphy, Yuanming Wang, Ziteng Wang","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-09-02T00:14:50Z","title":"Discovery of ASKAP J173608.2-321635 as a Highly-Polarized Transient Point Source with the Australian SKA Pathfinder"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.00652","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":"sha256:74f709c46c61c9403b2bdff35111aaba0c9e67a459939bb9bba31000dad2cb57","target":"record","created_at":"2026-07-05T03:23:49Z","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":"dceca203dc1f3aaf72f39f70a46752ca90e3268d5ca610a1b534e5335d66612b","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-09-02T00:14:50Z","title_canon_sha256":"e180cc433780523b4793a6a48e5ff1cd5bd8ab166bc98620a521a273b125ac9b"},"schema_version":"1.0","source":{"id":"2109.00652","kind":"arxiv","version":1}},"canonical_sha256":"b66d40f2b1eb1be1451b4e761b6bb722b6a91a2d0596a2fab5d04fa19762f21f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b66d40f2b1eb1be1451b4e761b6bb722b6a91a2d0596a2fab5d04fa19762f21f","first_computed_at":"2026-07-05T03:23:49.669784Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:23:49.669784Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RztlzazSHRpHeNLYBCmI2fIUcQ7p/Em72kKmIP+ArlipMI2meFowOjFXFamSCHwIcG0qouCtqrjXhMCW9BdIDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T03:23:49.670195Z","signed_message":"canonical_sha256_bytes"},"source_id":"2109.00652","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:74f709c46c61c9403b2bdff35111aaba0c9e67a459939bb9bba31000dad2cb57","sha256:627ad76b139fbe0fe67361ac23fc1be547ce2ad9b34026afd413421dbe5c7195"],"state_sha256":"c0ad9c80abcc2f304e494b9715a7490cae687697c3fd5d965063fc1bbb4ec25f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Okucqs8UXKyrM9uE/3LBIg6slQvimqql1y0egBoYFJjGLr7Ggg7d08tgmiFVH1bDSq+ro8NrgWSjYLHp2gKdCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-23T03:19:29.843745Z","bundle_sha256":"86f20691782f616dd363673d0cd856de0387cfabe3809570f2eb5a5442e5ac69"}}