{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:ZDGSKE2Z6EDQJ47X2A6I2E4OJ5","short_pith_number":"pith:ZDGSKE2Z","canonical_record":{"source":{"id":"1710.09393","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-10-25T18:03:00Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"72546591a27ca0f93d5232238a8c6e122f84f79a1fce05f301ee933d12f4958c","abstract_canon_sha256":"f48ff7bd31ecc35afb9386c4d8f4dda779712bd99853683ec7e9631887647fa5"},"schema_version":"1.0"},"canonical_sha256":"c8cd251359f10704f3f7d03c8d138e4f606a4fc3dc8e9caa2d5c93ac163c2fb3","source":{"kind":"arxiv","id":"1710.09393","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1710.09393","created_at":"2026-05-18T00:23:30Z"},{"alias_kind":"arxiv_version","alias_value":"1710.09393v1","created_at":"2026-05-18T00:23:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1710.09393","created_at":"2026-05-18T00:23:30Z"},{"alias_kind":"pith_short_12","alias_value":"ZDGSKE2Z6EDQ","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_16","alias_value":"ZDGSKE2Z6EDQJ47X","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_8","alias_value":"ZDGSKE2Z","created_at":"2026-05-18T12:31:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:ZDGSKE2Z6EDQJ47X2A6I2E4OJ5","target":"record","payload":{"canonical_record":{"source":{"id":"1710.09393","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-10-25T18:03:00Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"72546591a27ca0f93d5232238a8c6e122f84f79a1fce05f301ee933d12f4958c","abstract_canon_sha256":"f48ff7bd31ecc35afb9386c4d8f4dda779712bd99853683ec7e9631887647fa5"},"schema_version":"1.0"},"canonical_sha256":"c8cd251359f10704f3f7d03c8d138e4f606a4fc3dc8e9caa2d5c93ac163c2fb3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:23:30.058912Z","signature_b64":"GlxtIf/LpR+5wD1yzvlzX/r23ww++ZwLwPHhXdbAkcFXAsUBSSJbHX0QQaD6EvUP9J0RpU3KLe2J40I1/ZpQDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c8cd251359f10704f3f7d03c8d138e4f606a4fc3dc8e9caa2d5c93ac163c2fb3","last_reissued_at":"2026-05-18T00:23:30.058358Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:23:30.058358Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1710.09393","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":"2026-05-18T00:23:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fIHmkg3ocIb8YLyRmF/J8kdLhpTbeCq23EebbO4v2W8m8AyYD7qpXiXh+Mhy3r/XNzCTm9X+6QCH5Wj5QFeBCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T18:24:10.734343Z"},"content_sha256":"45b4cd5bca49003d59527183ff64cbf2777c27eae38e5a03b28ffc7825a4c03c","schema_version":"1.0","event_id":"sha256:45b4cd5bca49003d59527183ff64cbf2777c27eae38e5a03b28ffc7825a4c03c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:ZDGSKE2Z6EDQJ47X2A6I2E4OJ5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"DZ Cha: a bona fide photoevaporating disc","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.EP","authors_text":"A. Garufi, A. Hardy, B. Montesinos, C. Caceres, C. Eiroa, E. Villaver, F. M\\'enard, G. Meeus, H. Canovas, I. Rebollido, J. de Boer, J. Olofsson, L. A. Cieza, M. R. Schreiber, P. Riviere-Marichalar, R. G. van Holstein, Z. Wahhaj","submitted_at":"2017-10-25T18:03:00Z","abstract_excerpt":"DZ Cha is a weak-lined T Tauri star (WTTS) surrounded by a bright protoplanetary disc with evidence of inner disc clearing. Its narrow $\\Ha$ line and infrared spectral energy distribution suggest that DZ Cha may be a photoevaporating disc. We aim to analyse the DZ Cha star + disc system to identify the mechanism driving the evolution of this object. We have analysed three epochs of high resolution optical spectroscopy, photometry from the UV up to the sub-mm regime, infrared spectroscopy, and J-band imaging polarimetry observations of DZ Cha. Combining our analysis with previous studies we fin"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.09393","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":"2026-05-18T00:23:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6bpLQcVtFV5zwdiQUTE7f2uPI8l1pR0R6ymHBAH3ZcPEN0nVMmvkSwOePlP03O8JkZkymciAFL3drQ0+NhW6Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T18:24:10.734721Z"},"content_sha256":"3b9cdbd7d0d5f8aea9896c9ffca27a8668f533428dbe36c318967082914ad09d","schema_version":"1.0","event_id":"sha256:3b9cdbd7d0d5f8aea9896c9ffca27a8668f533428dbe36c318967082914ad09d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZDGSKE2Z6EDQJ47X2A6I2E4OJ5/bundle.json","state_url":"https://pith.science/pith/ZDGSKE2Z6EDQJ47X2A6I2E4OJ5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZDGSKE2Z6EDQJ47X2A6I2E4OJ5/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":"2026-05-22T18:24:10Z","links":{"resolver":"https://pith.science/pith/ZDGSKE2Z6EDQJ47X2A6I2E4OJ5","bundle":"https://pith.science/pith/ZDGSKE2Z6EDQJ47X2A6I2E4OJ5/bundle.json","state":"https://pith.science/pith/ZDGSKE2Z6EDQJ47X2A6I2E4OJ5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZDGSKE2Z6EDQJ47X2A6I2E4OJ5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:ZDGSKE2Z6EDQJ47X2A6I2E4OJ5","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":"f48ff7bd31ecc35afb9386c4d8f4dda779712bd99853683ec7e9631887647fa5","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-10-25T18:03:00Z","title_canon_sha256":"72546591a27ca0f93d5232238a8c6e122f84f79a1fce05f301ee933d12f4958c"},"schema_version":"1.0","source":{"id":"1710.09393","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1710.09393","created_at":"2026-05-18T00:23:30Z"},{"alias_kind":"arxiv_version","alias_value":"1710.09393v1","created_at":"2026-05-18T00:23:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1710.09393","created_at":"2026-05-18T00:23:30Z"},{"alias_kind":"pith_short_12","alias_value":"ZDGSKE2Z6EDQ","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_16","alias_value":"ZDGSKE2Z6EDQJ47X","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_8","alias_value":"ZDGSKE2Z","created_at":"2026-05-18T12:31:59Z"}],"graph_snapshots":[{"event_id":"sha256:3b9cdbd7d0d5f8aea9896c9ffca27a8668f533428dbe36c318967082914ad09d","target":"graph","created_at":"2026-05-18T00:23:30Z","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":"DZ Cha is a weak-lined T Tauri star (WTTS) surrounded by a bright protoplanetary disc with evidence of inner disc clearing. Its narrow $\\Ha$ line and infrared spectral energy distribution suggest that DZ Cha may be a photoevaporating disc. We aim to analyse the DZ Cha star + disc system to identify the mechanism driving the evolution of this object. We have analysed three epochs of high resolution optical spectroscopy, photometry from the UV up to the sub-mm regime, infrared spectroscopy, and J-band imaging polarimetry observations of DZ Cha. Combining our analysis with previous studies we fin","authors_text":"A. Garufi, A. Hardy, B. Montesinos, C. Caceres, C. Eiroa, E. Villaver, F. M\\'enard, G. Meeus, H. Canovas, I. Rebollido, J. de Boer, J. Olofsson, L. A. Cieza, M. R. Schreiber, P. Riviere-Marichalar, R. G. van Holstein, Z. Wahhaj","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-10-25T18:03:00Z","title":"DZ Cha: a bona fide photoevaporating disc"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.09393","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":"sha256:45b4cd5bca49003d59527183ff64cbf2777c27eae38e5a03b28ffc7825a4c03c","target":"record","created_at":"2026-05-18T00:23:30Z","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":"f48ff7bd31ecc35afb9386c4d8f4dda779712bd99853683ec7e9631887647fa5","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-10-25T18:03:00Z","title_canon_sha256":"72546591a27ca0f93d5232238a8c6e122f84f79a1fce05f301ee933d12f4958c"},"schema_version":"1.0","source":{"id":"1710.09393","kind":"arxiv","version":1}},"canonical_sha256":"c8cd251359f10704f3f7d03c8d138e4f606a4fc3dc8e9caa2d5c93ac163c2fb3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c8cd251359f10704f3f7d03c8d138e4f606a4fc3dc8e9caa2d5c93ac163c2fb3","first_computed_at":"2026-05-18T00:23:30.058358Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:23:30.058358Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GlxtIf/LpR+5wD1yzvlzX/r23ww++ZwLwPHhXdbAkcFXAsUBSSJbHX0QQaD6EvUP9J0RpU3KLe2J40I1/ZpQDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:23:30.058912Z","signed_message":"canonical_sha256_bytes"},"source_id":"1710.09393","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:45b4cd5bca49003d59527183ff64cbf2777c27eae38e5a03b28ffc7825a4c03c","sha256:3b9cdbd7d0d5f8aea9896c9ffca27a8668f533428dbe36c318967082914ad09d"],"state_sha256":"2c3d91df7081878a95edd3ece098341895f3c538e7109809c15fca4d005eba7f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Q/pErcjeDcL0bWvSMOToxWbxbqi/KWratiYhaA19h74Q3RbT34SnrjawL9ZIyHUQViAZeYOTsWm7Nnmv9z5vDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-22T18:24:10.736946Z","bundle_sha256":"f6950687f61864b06a6c481aaf2d03a47b3414ef455542d93f6d3796f8ca3759"}}