{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:KHV2TTTFFRJQNSL373PPBTDTLA","short_pith_number":"pith:KHV2TTTF","canonical_record":{"source":{"id":"1412.2014","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-12-05T14:50:50Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"42f62d247ff9ae3600cea382e6e76a20cacf805b88f70421c0e24e0ea3f19744","abstract_canon_sha256":"2c398c7b43b5269c12732f72880f2edb4430d403693a7edfe8586ea3496e1d3b"},"schema_version":"1.0"},"canonical_sha256":"51eba9ce652c5306c97bfedef0cc735829e843049eb37618c3eab90e48337c70","source":{"kind":"arxiv","id":"1412.2014","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.2014","created_at":"2026-05-18T01:41:22Z"},{"alias_kind":"arxiv_version","alias_value":"1412.2014v1","created_at":"2026-05-18T01:41:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.2014","created_at":"2026-05-18T01:41:22Z"},{"alias_kind":"pith_short_12","alias_value":"KHV2TTTFFRJQ","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_16","alias_value":"KHV2TTTFFRJQNSL3","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_8","alias_value":"KHV2TTTF","created_at":"2026-05-18T12:28:35Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:KHV2TTTFFRJQNSL373PPBTDTLA","target":"record","payload":{"canonical_record":{"source":{"id":"1412.2014","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-12-05T14:50:50Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"42f62d247ff9ae3600cea382e6e76a20cacf805b88f70421c0e24e0ea3f19744","abstract_canon_sha256":"2c398c7b43b5269c12732f72880f2edb4430d403693a7edfe8586ea3496e1d3b"},"schema_version":"1.0"},"canonical_sha256":"51eba9ce652c5306c97bfedef0cc735829e843049eb37618c3eab90e48337c70","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:41:22.937026Z","signature_b64":"E+DwKR9hWphWzWCB8SrBbGF6k1Mt60VWqFtMOmcAW1SMbMHZSQw0ePF7SEsNP+OoKLBCq1L6oW42RwT05O3cBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"51eba9ce652c5306c97bfedef0cc735829e843049eb37618c3eab90e48337c70","last_reissued_at":"2026-05-18T01:41:22.936387Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:41:22.936387Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1412.2014","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":"2026-05-18T01:41:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CB8YXjYDNgkVJROSJkdRbdCaIIukX8X97FFxkVkdMvJGLl5gZ87PWAr8IN9b3LkvRWw7ed4ATlEMcO32OPuTCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T14:46:52.202566Z"},"content_sha256":"aae3a7cbf11762eda66f788a15562e037db393fb28cdc337905e97642179a446","schema_version":"1.0","event_id":"sha256:aae3a7cbf11762eda66f788a15562e037db393fb28cdc337905e97642179a446"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:KHV2TTTFFRJQNSL373PPBTDTLA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Pre-main sequence accretion in the low metallicity Galactic star-forming region Sh 2-284","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"J. S. Vink, V. M. Kalari","submitted_at":"2014-12-05T14:50:50Z","abstract_excerpt":"We present optical spectra of pre-main sequence (PMS) candidates around the H$\\alpha$ region taken with the Southern African Large Telescope, SALT, in the low metallicity ($Z$) Galactic region Sh 2-284, which includes the open cluster Dolidze 25 with an atypical low metallicity of $Z$ $\\sim$ 1/5 $Z_{\\odot}$. It has been suggested on the basis of both theory and observations that PMS mass-accretion rates, $\\dot M_{\\rm{acc}}$, are a function of $Z$. We present the first sample of spectroscopic estimates of mass-accretion rates for PMS stars in any low-$Z$ star-forming region. Our data-set was en"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.2014","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":"2026-05-18T01:41:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cmn3pFuSfzZbbYVE+tYXVdpIxf+XmTZSU6JCUX6zfImdy03+l/cSthLMfq0TzXQH/c0hhDn2GTFshznwTh7ICw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T14:46:52.202920Z"},"content_sha256":"3c1d910aeece571fb166f96ca8c4e02f6e2d67225366aba8588963945c666de6","schema_version":"1.0","event_id":"sha256:3c1d910aeece571fb166f96ca8c4e02f6e2d67225366aba8588963945c666de6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KHV2TTTFFRJQNSL373PPBTDTLA/bundle.json","state_url":"https://pith.science/pith/KHV2TTTFFRJQNSL373PPBTDTLA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KHV2TTTFFRJQNSL373PPBTDTLA/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":"2026-06-03T14:46:52Z","links":{"resolver":"https://pith.science/pith/KHV2TTTFFRJQNSL373PPBTDTLA","bundle":"https://pith.science/pith/KHV2TTTFFRJQNSL373PPBTDTLA/bundle.json","state":"https://pith.science/pith/KHV2TTTFFRJQNSL373PPBTDTLA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KHV2TTTFFRJQNSL373PPBTDTLA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:KHV2TTTFFRJQNSL373PPBTDTLA","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":"2c398c7b43b5269c12732f72880f2edb4430d403693a7edfe8586ea3496e1d3b","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-12-05T14:50:50Z","title_canon_sha256":"42f62d247ff9ae3600cea382e6e76a20cacf805b88f70421c0e24e0ea3f19744"},"schema_version":"1.0","source":{"id":"1412.2014","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.2014","created_at":"2026-05-18T01:41:22Z"},{"alias_kind":"arxiv_version","alias_value":"1412.2014v1","created_at":"2026-05-18T01:41:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.2014","created_at":"2026-05-18T01:41:22Z"},{"alias_kind":"pith_short_12","alias_value":"KHV2TTTFFRJQ","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_16","alias_value":"KHV2TTTFFRJQNSL3","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_8","alias_value":"KHV2TTTF","created_at":"2026-05-18T12:28:35Z"}],"graph_snapshots":[{"event_id":"sha256:3c1d910aeece571fb166f96ca8c4e02f6e2d67225366aba8588963945c666de6","target":"graph","created_at":"2026-05-18T01:41:22Z","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 present optical spectra of pre-main sequence (PMS) candidates around the H$\\alpha$ region taken with the Southern African Large Telescope, SALT, in the low metallicity ($Z$) Galactic region Sh 2-284, which includes the open cluster Dolidze 25 with an atypical low metallicity of $Z$ $\\sim$ 1/5 $Z_{\\odot}$. It has been suggested on the basis of both theory and observations that PMS mass-accretion rates, $\\dot M_{\\rm{acc}}$, are a function of $Z$. We present the first sample of spectroscopic estimates of mass-accretion rates for PMS stars in any low-$Z$ star-forming region. Our data-set was en","authors_text":"J. S. Vink, V. M. Kalari","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-12-05T14:50:50Z","title":"Pre-main sequence accretion in the low metallicity Galactic star-forming region Sh 2-284"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.2014","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:aae3a7cbf11762eda66f788a15562e037db393fb28cdc337905e97642179a446","target":"record","created_at":"2026-05-18T01:41:22Z","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":"2c398c7b43b5269c12732f72880f2edb4430d403693a7edfe8586ea3496e1d3b","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-12-05T14:50:50Z","title_canon_sha256":"42f62d247ff9ae3600cea382e6e76a20cacf805b88f70421c0e24e0ea3f19744"},"schema_version":"1.0","source":{"id":"1412.2014","kind":"arxiv","version":1}},"canonical_sha256":"51eba9ce652c5306c97bfedef0cc735829e843049eb37618c3eab90e48337c70","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"51eba9ce652c5306c97bfedef0cc735829e843049eb37618c3eab90e48337c70","first_computed_at":"2026-05-18T01:41:22.936387Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:41:22.936387Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"E+DwKR9hWphWzWCB8SrBbGF6k1Mt60VWqFtMOmcAW1SMbMHZSQw0ePF7SEsNP+OoKLBCq1L6oW42RwT05O3cBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:41:22.937026Z","signed_message":"canonical_sha256_bytes"},"source_id":"1412.2014","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:aae3a7cbf11762eda66f788a15562e037db393fb28cdc337905e97642179a446","sha256:3c1d910aeece571fb166f96ca8c4e02f6e2d67225366aba8588963945c666de6"],"state_sha256":"fa56192cde9b152c50aae1563616b3f42a6ffd2c3de0c5138db3862bdffeb0da"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aUMTavzOhD0k2caUqP7pLyys2ZGaI0NL7RQA6UsbaP7a/Rufpw/IH1GyuXrmlG6fx6KYQq9hRuEcP6+8BZDsDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T14:46:52.206028Z","bundle_sha256":"7c6f09caa8ee25e56315d68fe53aa9e54d041fe4c1e7704a909d68ab48becdec"}}