{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:W6QKIF3XJOW3U42JERSSZOVCHS","short_pith_number":"pith:W6QKIF3X","canonical_record":{"source":{"id":"1611.03282","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-10T12:32:38Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"06f4f096157aa4f204b8f9984bd6603bb3ff0a320a81aad5293f9f9b03b8c636","abstract_canon_sha256":"aad6e4aa8139caabfd0097e99ffd935c86476aece6f6102370dadccae699dc74"},"schema_version":"1.0"},"canonical_sha256":"b7a0a417774badba734924652cbaa23cbf51d36c17f06731434870eee8f3ee92","source":{"kind":"arxiv","id":"1611.03282","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.03282","created_at":"2026-05-18T00:52:37Z"},{"alias_kind":"arxiv_version","alias_value":"1611.03282v1","created_at":"2026-05-18T00:52:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.03282","created_at":"2026-05-18T00:52:37Z"},{"alias_kind":"pith_short_12","alias_value":"W6QKIF3XJOW3","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"W6QKIF3XJOW3U42J","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"W6QKIF3X","created_at":"2026-05-18T12:30:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:W6QKIF3XJOW3U42JERSSZOVCHS","target":"record","payload":{"canonical_record":{"source":{"id":"1611.03282","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-10T12:32:38Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"06f4f096157aa4f204b8f9984bd6603bb3ff0a320a81aad5293f9f9b03b8c636","abstract_canon_sha256":"aad6e4aa8139caabfd0097e99ffd935c86476aece6f6102370dadccae699dc74"},"schema_version":"1.0"},"canonical_sha256":"b7a0a417774badba734924652cbaa23cbf51d36c17f06731434870eee8f3ee92","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:52:37.969473Z","signature_b64":"wy9iVBsOwB/8wRR6duXEoLCqvCMiURzou3Qhq61dv0xAsN82Hw1oXm5L3fxzOAI42h0BfXQKxIuqGCFSN7aFAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b7a0a417774badba734924652cbaa23cbf51d36c17f06731434870eee8f3ee92","last_reissued_at":"2026-05-18T00:52:37.968889Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:52:37.968889Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1611.03282","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":"2026-05-18T00:52:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AP2t+4mZCWinXl8T5T1JWJQlgUmH+AhMhD8P7McBrQyC2C/sEk9Bwt5fEIzl1khOwZZIRlQU/c59cDRmwO6SDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T09:29:27.824268Z"},"content_sha256":"e295d2691803240e1e5f8886fc6a6bbe3609dd1758d880f8c514697e841b4c6e","schema_version":"1.0","event_id":"sha256:e295d2691803240e1e5f8886fc6a6bbe3609dd1758d880f8c514697e841b4c6e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:W6QKIF3XJOW3U42JERSSZOVCHS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A LOFAR detection of the low mass young star T Tau at 149 MHz","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Adam J. Stewart, Alexander Drabent, Alexander J. van der Horst, Anna M. M. Scaife, Colm P. Coughlan, Jean-Mathias Grei{\\ss}meier, Jess W. Broderick, Jochen Eisl\\\"offel, Joeri van Leeuwen, Malgorzata Pietka, Martin E. Bell, Matthias Hoeft, Philippe Zarka, Rachael E. Ainsworth, Ralph A.M.J. Wijers, Sera Markoff, St\\'ephane Corbel, Tom P. Ray","submitted_at":"2016-11-10T12:32:38Z","abstract_excerpt":"Radio observations of young stellar objects (YSOs) enable the study of ionised plasma outflows from young protostars via their free-free radiation. Previous studies of the low-mass young system T Tau have used radio observations to model the spectrum and estimate important physical properties of the associated ionised plasma (local electron density, ionised gas content and emission measure). However, without an indication of the low-frequency turnover in the free-free spectrum, these properties remain difficult to constrain. This paper presents the detection of T Tau at 149 MHz with the Low Fr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.03282","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":"2026-05-18T00:52:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7Kyb996jYuHz8nTv34Mygk6YAITK3UknU4n394XH6pkIvwXUDZU2QRiEuntsvgF0oKbSluUd5NCB9UlpPu/NCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T09:29:27.824652Z"},"content_sha256":"4d0efdf18f58ddda76b03532e6f942c39c5a41890be4888cb2d3013fcdf3c20a","schema_version":"1.0","event_id":"sha256:4d0efdf18f58ddda76b03532e6f942c39c5a41890be4888cb2d3013fcdf3c20a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/W6QKIF3XJOW3U42JERSSZOVCHS/bundle.json","state_url":"https://pith.science/pith/W6QKIF3XJOW3U42JERSSZOVCHS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/W6QKIF3XJOW3U42JERSSZOVCHS/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":"2026-06-03T09:29:27Z","links":{"resolver":"https://pith.science/pith/W6QKIF3XJOW3U42JERSSZOVCHS","bundle":"https://pith.science/pith/W6QKIF3XJOW3U42JERSSZOVCHS/bundle.json","state":"https://pith.science/pith/W6QKIF3XJOW3U42JERSSZOVCHS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/W6QKIF3XJOW3U42JERSSZOVCHS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:W6QKIF3XJOW3U42JERSSZOVCHS","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":"aad6e4aa8139caabfd0097e99ffd935c86476aece6f6102370dadccae699dc74","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-10T12:32:38Z","title_canon_sha256":"06f4f096157aa4f204b8f9984bd6603bb3ff0a320a81aad5293f9f9b03b8c636"},"schema_version":"1.0","source":{"id":"1611.03282","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.03282","created_at":"2026-05-18T00:52:37Z"},{"alias_kind":"arxiv_version","alias_value":"1611.03282v1","created_at":"2026-05-18T00:52:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.03282","created_at":"2026-05-18T00:52:37Z"},{"alias_kind":"pith_short_12","alias_value":"W6QKIF3XJOW3","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"W6QKIF3XJOW3U42J","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"W6QKIF3X","created_at":"2026-05-18T12:30:48Z"}],"graph_snapshots":[{"event_id":"sha256:4d0efdf18f58ddda76b03532e6f942c39c5a41890be4888cb2d3013fcdf3c20a","target":"graph","created_at":"2026-05-18T00:52:37Z","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"},"paper":{"abstract_excerpt":"Radio observations of young stellar objects (YSOs) enable the study of ionised plasma outflows from young protostars via their free-free radiation. Previous studies of the low-mass young system T Tau have used radio observations to model the spectrum and estimate important physical properties of the associated ionised plasma (local electron density, ionised gas content and emission measure). However, without an indication of the low-frequency turnover in the free-free spectrum, these properties remain difficult to constrain. This paper presents the detection of T Tau at 149 MHz with the Low Fr","authors_text":"Adam J. Stewart, Alexander Drabent, Alexander J. van der Horst, Anna M. M. Scaife, Colm P. Coughlan, Jean-Mathias Grei{\\ss}meier, Jess W. Broderick, Jochen Eisl\\\"offel, Joeri van Leeuwen, Malgorzata Pietka, Martin E. Bell, Matthias Hoeft, Philippe Zarka, Rachael E. Ainsworth, Ralph A.M.J. Wijers, Sera Markoff, St\\'ephane Corbel, Tom P. Ray","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-10T12:32:38Z","title":"A LOFAR detection of the low mass young star T Tau at 149 MHz"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.03282","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:e295d2691803240e1e5f8886fc6a6bbe3609dd1758d880f8c514697e841b4c6e","target":"record","created_at":"2026-05-18T00:52:37Z","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":"aad6e4aa8139caabfd0097e99ffd935c86476aece6f6102370dadccae699dc74","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-11-10T12:32:38Z","title_canon_sha256":"06f4f096157aa4f204b8f9984bd6603bb3ff0a320a81aad5293f9f9b03b8c636"},"schema_version":"1.0","source":{"id":"1611.03282","kind":"arxiv","version":1}},"canonical_sha256":"b7a0a417774badba734924652cbaa23cbf51d36c17f06731434870eee8f3ee92","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b7a0a417774badba734924652cbaa23cbf51d36c17f06731434870eee8f3ee92","first_computed_at":"2026-05-18T00:52:37.968889Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:52:37.968889Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wy9iVBsOwB/8wRR6duXEoLCqvCMiURzou3Qhq61dv0xAsN82Hw1oXm5L3fxzOAI42h0BfXQKxIuqGCFSN7aFAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:52:37.969473Z","signed_message":"canonical_sha256_bytes"},"source_id":"1611.03282","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e295d2691803240e1e5f8886fc6a6bbe3609dd1758d880f8c514697e841b4c6e","sha256:4d0efdf18f58ddda76b03532e6f942c39c5a41890be4888cb2d3013fcdf3c20a"],"state_sha256":"b20e86ca5dd84525632a0ff897df0a081bba3463030251b9b5b50d2da756cb9f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kVuhHcRWMatjR46zUUt+ILLVovYIkPOINwPZs/dmxQjJ4Dd8/9k9a3MjGLHX53rBcpI/GcioaTPUbdMeDAOKBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T09:29:27.826589Z","bundle_sha256":"2783542c097c78697fb253e895d3cb815626bb89b6a187fa59f158371ef0e39e"}}