{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:ZVWX72DJDILPV4MYTUTYZ73YZO","short_pith_number":"pith:ZVWX72DJ","canonical_record":{"source":{"id":"1807.04759","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-07-12T18:00:04Z","cross_cats_sorted":[],"title_canon_sha256":"b969f52e9c542c9895d20e8a2a7a0886fa38bd0e6eb25e20e4c3c0a6bdef3fea","abstract_canon_sha256":"2b252f5684f602f4784e300648ea9353c3684bf50c024f978503311a5c269bb8"},"schema_version":"1.0"},"canonical_sha256":"cd6d7fe8691a16faf1989d278cff78cba4f6036d1497623b2791c8b0b253e434","source":{"kind":"arxiv","id":"1807.04759","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.04759","created_at":"2026-05-18T00:10:44Z"},{"alias_kind":"arxiv_version","alias_value":"1807.04759v2","created_at":"2026-05-18T00:10:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.04759","created_at":"2026-05-18T00:10:44Z"},{"alias_kind":"pith_short_12","alias_value":"ZVWX72DJDILP","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"ZVWX72DJDILPV4MY","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"ZVWX72DJ","created_at":"2026-05-18T12:33:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:ZVWX72DJDILPV4MYTUTYZ73YZO","target":"record","payload":{"canonical_record":{"source":{"id":"1807.04759","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-07-12T18:00:04Z","cross_cats_sorted":[],"title_canon_sha256":"b969f52e9c542c9895d20e8a2a7a0886fa38bd0e6eb25e20e4c3c0a6bdef3fea","abstract_canon_sha256":"2b252f5684f602f4784e300648ea9353c3684bf50c024f978503311a5c269bb8"},"schema_version":"1.0"},"canonical_sha256":"cd6d7fe8691a16faf1989d278cff78cba4f6036d1497623b2791c8b0b253e434","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:10:44.153582Z","signature_b64":"HVM9gO247R+VvS5ZvOnE3orl0YOAQNhQeLz0/tUAfW424TnIe+13OEanFJwSICBIf4iYYfUF5rY6CN3sI31pBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cd6d7fe8691a16faf1989d278cff78cba4f6036d1497623b2791c8b0b253e434","last_reissued_at":"2026-05-18T00:10:44.152972Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:10:44.152972Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1807.04759","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":"2026-05-18T00:10:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9ZP5oAhner4OPvclS+N4b9RlolFQ/Qf9FwK4yE0ekvQWIpfj5pNBD614todKmuVRS3FrRzMEliuFlBvorCcmAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T15:08:07.453013Z"},"content_sha256":"01dc7f51a76f2bebacbb7fc416bf939c3f9011753e3649a8806b766e1046a71f","schema_version":"1.0","event_id":"sha256:01dc7f51a76f2bebacbb7fc416bf939c3f9011753e3649a8806b766e1046a71f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:ZVWX72DJDILPV4MYTUTYZ73YZO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ghost of a Shell: Magnetic Fields of Galactic Supershell GSH 006$-$15$+$7","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Alec J. M. Thomson, B. M. Gaensler, Christoph Federrath, Ettore Carretti, John M. Dickey, Lister Staveley-Smith, Marijke Haverkorn, M. J. Kesteven, N. M. McClure-Griffiths","submitted_at":"2018-07-12T18:00:04Z","abstract_excerpt":"We identify a counterpart to a Galactic supershell in diffuse radio polarisation, and use this to determine the magnetic fields associated with this object. GSH 006$-$15$+$7 has perturbed the polarised emission at 2.3$\\,$GHz, as observed in the S-band Polarisation All Sky Survey (S-PASS), acting as a Faraday screen. We model the Faraday rotation over the shell, and produce a map of Faraday depth over the area across it. Such models require information about the polarised emission behind the screen, which we obtain from the Wilkinson Microwave Anisotropy Probe (WMAP), scaled from 23$\\,$GHz to 2"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.04759","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":"2026-05-18T00:10:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8LppRU8g4oRn/Yb0xI53TAjz6nSIofDrTuP8+CxlJVtPMvg9aGSGej8bpNH9PbE1dVAO8l+aM2gkgko1tzj6Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T15:08:07.453733Z"},"content_sha256":"44a93d73a48994f2e912a85695242ffc8943473b2f86b526bcfb59f86bd45bcc","schema_version":"1.0","event_id":"sha256:44a93d73a48994f2e912a85695242ffc8943473b2f86b526bcfb59f86bd45bcc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZVWX72DJDILPV4MYTUTYZ73YZO/bundle.json","state_url":"https://pith.science/pith/ZVWX72DJDILPV4MYTUTYZ73YZO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZVWX72DJDILPV4MYTUTYZ73YZO/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":"2026-08-22T15:08:07Z","links":{"resolver":"https://pith.science/pith/ZVWX72DJDILPV4MYTUTYZ73YZO","bundle":"https://pith.science/pith/ZVWX72DJDILPV4MYTUTYZ73YZO/bundle.json","state":"https://pith.science/pith/ZVWX72DJDILPV4MYTUTYZ73YZO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZVWX72DJDILPV4MYTUTYZ73YZO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:ZVWX72DJDILPV4MYTUTYZ73YZO","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":"2b252f5684f602f4784e300648ea9353c3684bf50c024f978503311a5c269bb8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-07-12T18:00:04Z","title_canon_sha256":"b969f52e9c542c9895d20e8a2a7a0886fa38bd0e6eb25e20e4c3c0a6bdef3fea"},"schema_version":"1.0","source":{"id":"1807.04759","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.04759","created_at":"2026-05-18T00:10:44Z"},{"alias_kind":"arxiv_version","alias_value":"1807.04759v2","created_at":"2026-05-18T00:10:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.04759","created_at":"2026-05-18T00:10:44Z"},{"alias_kind":"pith_short_12","alias_value":"ZVWX72DJDILP","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"ZVWX72DJDILPV4MY","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"ZVWX72DJ","created_at":"2026-05-18T12:33:07Z"}],"graph_snapshots":[{"event_id":"sha256:44a93d73a48994f2e912a85695242ffc8943473b2f86b526bcfb59f86bd45bcc","target":"graph","created_at":"2026-05-18T00:10:44Z","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 identify a counterpart to a Galactic supershell in diffuse radio polarisation, and use this to determine the magnetic fields associated with this object. GSH 006$-$15$+$7 has perturbed the polarised emission at 2.3$\\,$GHz, as observed in the S-band Polarisation All Sky Survey (S-PASS), acting as a Faraday screen. We model the Faraday rotation over the shell, and produce a map of Faraday depth over the area across it. Such models require information about the polarised emission behind the screen, which we obtain from the Wilkinson Microwave Anisotropy Probe (WMAP), scaled from 23$\\,$GHz to 2","authors_text":"Alec J. M. Thomson, B. M. Gaensler, Christoph Federrath, Ettore Carretti, John M. Dickey, Lister Staveley-Smith, Marijke Haverkorn, M. J. Kesteven, N. M. McClure-Griffiths","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-07-12T18:00:04Z","title":"Ghost of a Shell: Magnetic Fields of Galactic Supershell GSH 006$-$15$+$7"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.04759","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":"sha256:01dc7f51a76f2bebacbb7fc416bf939c3f9011753e3649a8806b766e1046a71f","target":"record","created_at":"2026-05-18T00:10:44Z","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":"2b252f5684f602f4784e300648ea9353c3684bf50c024f978503311a5c269bb8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-07-12T18:00:04Z","title_canon_sha256":"b969f52e9c542c9895d20e8a2a7a0886fa38bd0e6eb25e20e4c3c0a6bdef3fea"},"schema_version":"1.0","source":{"id":"1807.04759","kind":"arxiv","version":2}},"canonical_sha256":"cd6d7fe8691a16faf1989d278cff78cba4f6036d1497623b2791c8b0b253e434","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cd6d7fe8691a16faf1989d278cff78cba4f6036d1497623b2791c8b0b253e434","first_computed_at":"2026-05-18T00:10:44.152972Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:10:44.152972Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HVM9gO247R+VvS5ZvOnE3orl0YOAQNhQeLz0/tUAfW424TnIe+13OEanFJwSICBIf4iYYfUF5rY6CN3sI31pBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:10:44.153582Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.04759","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:01dc7f51a76f2bebacbb7fc416bf939c3f9011753e3649a8806b766e1046a71f","sha256:44a93d73a48994f2e912a85695242ffc8943473b2f86b526bcfb59f86bd45bcc"],"state_sha256":"ae257a87746cf817bbb664e6a7522bc36843806e329a8af530ffb0a5e0053824"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lUFkp5U2tQz7UPy4FShrA8YUICHYRswHq85dfMzm9ogWgNGvlA9/X3k+VFBDcSLn/65A9FiHGeyqH/ZjkpQSBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-22T15:08:07.459324Z","bundle_sha256":"a679b6200fca756d6f1d7f4b5945ee7c64d7faba02aefd056b78ac1deec19119"}}