{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:Z55CI4KVIFGPSSPXIU7Q6UCU7G","short_pith_number":"pith:Z55CI4KV","canonical_record":{"source":{"id":"1611.05446","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-11-16T21:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"9a207377908b3e7525aafca4e7ae3a03b3b34e444df6247652f85d415f93769a","abstract_canon_sha256":"5f74877fa780ef060be516f17716dedc3d156decb8202a84b8e12a84ce8da8c3"},"schema_version":"1.0"},"canonical_sha256":"cf7a247155414cf949f7453f0f5054f99ec110ab6369db73ee66296f66adc23e","source":{"kind":"arxiv","id":"1611.05446","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.05446","created_at":"2026-05-18T00:34:42Z"},{"alias_kind":"arxiv_version","alias_value":"1611.05446v2","created_at":"2026-05-18T00:34:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.05446","created_at":"2026-05-18T00:34:42Z"},{"alias_kind":"pith_short_12","alias_value":"Z55CI4KVIFGP","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_16","alias_value":"Z55CI4KVIFGPSSPX","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_8","alias_value":"Z55CI4KV","created_at":"2026-05-18T12:30:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:Z55CI4KVIFGPSSPXIU7Q6UCU7G","target":"record","payload":{"canonical_record":{"source":{"id":"1611.05446","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-11-16T21:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"9a207377908b3e7525aafca4e7ae3a03b3b34e444df6247652f85d415f93769a","abstract_canon_sha256":"5f74877fa780ef060be516f17716dedc3d156decb8202a84b8e12a84ce8da8c3"},"schema_version":"1.0"},"canonical_sha256":"cf7a247155414cf949f7453f0f5054f99ec110ab6369db73ee66296f66adc23e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:34:42.197198Z","signature_b64":"UpQKHp66RRROsiYsSewXDEHLqgkfsJu7/Ol02Qbw5NgmG/G7dBWUINBwGUppHN9wqVDxemZi85IL5N5l/61FAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cf7a247155414cf949f7453f0f5054f99ec110ab6369db73ee66296f66adc23e","last_reissued_at":"2026-05-18T00:34:42.196366Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:34:42.196366Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1611.05446","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":"2026-05-18T00:34:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aWrQXIqe1NYXrsAhsUoN4oF9F1TcpaNSO25rs6COhuyTJrk2Fa6xrty3RL6l0slDcroXoQQQonooWc4Kp95RAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T10:40:57.052941Z"},"content_sha256":"614363d9526f731d67248e10c0762cb5a098cd37b8f8e40d518447055168c57c","schema_version":"1.0","event_id":"sha256:614363d9526f731d67248e10c0762cb5a098cd37b8f8e40d518447055168c57c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:Z55CI4KVIFGPSSPXIU7Q6UCU7G","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Galactic synchrotron emissivity measurements between 250{\\deg} < l < 355{\\deg} from the GLEAM survey with the MWA","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. D. Kapi\\'nska, A. R. Offringa, B. McKinley, B. M. Gaensler, B. Q. For, C. A. Jackson, C. Wu, E. Lenc, H. Su, J. Morgan, J. R. Callingham, K. S. Dwarkanath, L. Hindson, L. Staveley-Smith, M. E. Bell, M. Johnston-Hollitt, N. Hurley-Walker, N. M. McClure-Griffiths, P. Hancock, P. Procopio, Q. Zheng, R. B. Wayth, S. J. Tingay","submitted_at":"2016-11-16T21:00:01Z","abstract_excerpt":"Synchrotron emission pervades the Galactic plane at low radio frequencies, originating from cosmic ray electrons interacting with the Galactic magnetic field. Using a low-frequency radio telescope, the Murchison Widefield Array (MWA), we measure the free-free absorption of this Galactic synchrotron emission by intervening HII regions along the line of sight. These absorption measurements allow us to calculate the Galactic cosmic-ray electron emissivity behind and in front of 47 detected HII regions in the region $250^\\circ < l < 355^\\circ$, $|b| < 2^\\circ$. We find that all average emissivitie"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.05446","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":"2026-05-18T00:34:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iK6LmRUMmthvPvKZfavwzKX108IJ4C/4jcJ92zmrQWPSCcwnbHEV0EvBiQTzyaTpXEs4L8R881HgOOulo+W/AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T10:40:57.053674Z"},"content_sha256":"daf55e72e29d6e332fccc5535bf56b90bec577e5d891f479ad99c32570ba4b62","schema_version":"1.0","event_id":"sha256:daf55e72e29d6e332fccc5535bf56b90bec577e5d891f479ad99c32570ba4b62"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Z55CI4KVIFGPSSPXIU7Q6UCU7G/bundle.json","state_url":"https://pith.science/pith/Z55CI4KVIFGPSSPXIU7Q6UCU7G/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Z55CI4KVIFGPSSPXIU7Q6UCU7G/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":"2026-05-26T10:40:57Z","links":{"resolver":"https://pith.science/pith/Z55CI4KVIFGPSSPXIU7Q6UCU7G","bundle":"https://pith.science/pith/Z55CI4KVIFGPSSPXIU7Q6UCU7G/bundle.json","state":"https://pith.science/pith/Z55CI4KVIFGPSSPXIU7Q6UCU7G/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Z55CI4KVIFGPSSPXIU7Q6UCU7G/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:Z55CI4KVIFGPSSPXIU7Q6UCU7G","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":"5f74877fa780ef060be516f17716dedc3d156decb8202a84b8e12a84ce8da8c3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-11-16T21:00:01Z","title_canon_sha256":"9a207377908b3e7525aafca4e7ae3a03b3b34e444df6247652f85d415f93769a"},"schema_version":"1.0","source":{"id":"1611.05446","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.05446","created_at":"2026-05-18T00:34:42Z"},{"alias_kind":"arxiv_version","alias_value":"1611.05446v2","created_at":"2026-05-18T00:34:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.05446","created_at":"2026-05-18T00:34:42Z"},{"alias_kind":"pith_short_12","alias_value":"Z55CI4KVIFGP","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_16","alias_value":"Z55CI4KVIFGPSSPX","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_8","alias_value":"Z55CI4KV","created_at":"2026-05-18T12:30:53Z"}],"graph_snapshots":[{"event_id":"sha256:daf55e72e29d6e332fccc5535bf56b90bec577e5d891f479ad99c32570ba4b62","target":"graph","created_at":"2026-05-18T00:34:42Z","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":"Synchrotron emission pervades the Galactic plane at low radio frequencies, originating from cosmic ray electrons interacting with the Galactic magnetic field. Using a low-frequency radio telescope, the Murchison Widefield Array (MWA), we measure the free-free absorption of this Galactic synchrotron emission by intervening HII regions along the line of sight. These absorption measurements allow us to calculate the Galactic cosmic-ray electron emissivity behind and in front of 47 detected HII regions in the region $250^\\circ < l < 355^\\circ$, $|b| < 2^\\circ$. We find that all average emissivitie","authors_text":"A. D. Kapi\\'nska, A. R. Offringa, B. McKinley, B. M. Gaensler, B. Q. For, C. A. Jackson, C. Wu, E. Lenc, H. Su, J. Morgan, J. R. Callingham, K. S. Dwarkanath, L. Hindson, L. Staveley-Smith, M. E. Bell, M. Johnston-Hollitt, N. Hurley-Walker, N. M. McClure-Griffiths, P. Hancock, P. Procopio, Q. Zheng, R. B. Wayth, S. J. Tingay","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-11-16T21:00:01Z","title":"Galactic synchrotron emissivity measurements between 250{\\deg} < l < 355{\\deg} from the GLEAM survey with the MWA"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.05446","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":"sha256:614363d9526f731d67248e10c0762cb5a098cd37b8f8e40d518447055168c57c","target":"record","created_at":"2026-05-18T00:34:42Z","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":"5f74877fa780ef060be516f17716dedc3d156decb8202a84b8e12a84ce8da8c3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-11-16T21:00:01Z","title_canon_sha256":"9a207377908b3e7525aafca4e7ae3a03b3b34e444df6247652f85d415f93769a"},"schema_version":"1.0","source":{"id":"1611.05446","kind":"arxiv","version":2}},"canonical_sha256":"cf7a247155414cf949f7453f0f5054f99ec110ab6369db73ee66296f66adc23e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cf7a247155414cf949f7453f0f5054f99ec110ab6369db73ee66296f66adc23e","first_computed_at":"2026-05-18T00:34:42.196366Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:34:42.196366Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UpQKHp66RRROsiYsSewXDEHLqgkfsJu7/Ol02Qbw5NgmG/G7dBWUINBwGUppHN9wqVDxemZi85IL5N5l/61FAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:34:42.197198Z","signed_message":"canonical_sha256_bytes"},"source_id":"1611.05446","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:614363d9526f731d67248e10c0762cb5a098cd37b8f8e40d518447055168c57c","sha256:daf55e72e29d6e332fccc5535bf56b90bec577e5d891f479ad99c32570ba4b62"],"state_sha256":"df436ba3b69e4769b849001ad0f3a191462b829813b873d034e084cd20758bd6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jTLvC533ouv3+cwSUpn6l+JCFklHAyVta1J6B6rfqVA/F4Ekn44HLz/PVI9ppXER15yjYF4uvt+2nqGf1aDqBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T10:40:57.057246Z","bundle_sha256":"ad7ac66338eb2b1becee93ae688ee29bef41e4dca1a84fcb4853f4dba0ec4346"}}