{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:OFPANXCEGBLVMABB3DPHQJUH2D","short_pith_number":"pith:OFPANXCE","canonical_record":{"source":{"id":"1703.04536","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-03-13T18:00:14Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"9068300c2d37ef8845cfc7a1d2909d3c01fbd573a04938108d37db2108f1a538","abstract_canon_sha256":"3692aa6672395bd012430a44233003ff3c541dc67242f34a50fd1d0ce84661af"},"schema_version":"1.0"},"canonical_sha256":"715e06dc443057560021d8de782687d0d55aab66716410d86fbd9455db357b82","source":{"kind":"arxiv","id":"1703.04536","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.04536","created_at":"2026-05-18T00:47:25Z"},{"alias_kind":"arxiv_version","alias_value":"1703.04536v2","created_at":"2026-05-18T00:47:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.04536","created_at":"2026-05-18T00:47:25Z"},{"alias_kind":"pith_short_12","alias_value":"OFPANXCEGBLV","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"OFPANXCEGBLVMABB","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"OFPANXCE","created_at":"2026-05-18T12:31:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:OFPANXCEGBLVMABB3DPHQJUH2D","target":"record","payload":{"canonical_record":{"source":{"id":"1703.04536","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-03-13T18:00:14Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"9068300c2d37ef8845cfc7a1d2909d3c01fbd573a04938108d37db2108f1a538","abstract_canon_sha256":"3692aa6672395bd012430a44233003ff3c541dc67242f34a50fd1d0ce84661af"},"schema_version":"1.0"},"canonical_sha256":"715e06dc443057560021d8de782687d0d55aab66716410d86fbd9455db357b82","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:47:25.997647Z","signature_b64":"EeabzSaRG9INhKH88yRHpD6xJGcg8xFSy1cYcrqSenUbSSzj5+DCMfXDjRc6LrDyWyq/XHrxvC1Hd7lVBR1ZAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"715e06dc443057560021d8de782687d0d55aab66716410d86fbd9455db357b82","last_reissued_at":"2026-05-18T00:47:25.996914Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:47:25.996914Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1703.04536","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":"2026-05-18T00:47:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5u7irn5iO7OB/vYo+V0331vCj0suT2ka90JW8r7Q2b6icXfANnuxF+Ns4ebMz/11NzaVX40XnO8C8du3mOywAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T20:32:21.913948Z"},"content_sha256":"7ecb63f4bb8278c36cf77ccd6d908c020fa7802affbfc0fdd599cb5f62c01aa1","schema_version":"1.0","event_id":"sha256:7ecb63f4bb8278c36cf77ccd6d908c020fa7802affbfc0fdd599cb5f62c01aa1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:OFPANXCEGBLVMABB3DPHQJUH2D","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"ZFIRE: Using H$\\alpha$ equivalent widths to investigate the in situ initial mass function at z~2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Adam Tomczak, Caroline Straatman, David B. Fisher, Glenn G. Kacprzak, Ivo Labbe, Karl Glazebrook, Kim-Vy Tran, Lee Spitler, Leo Alcorn, Lisa Kewley, Michael Cowley, Themiya Nanayakkara, Tiantian Yuan","submitted_at":"2017-03-13T18:00:14Z","abstract_excerpt":"We use the ZFIRE survey (http://zfire.swinburne.edu.au) to investigate the high mass slope of the initial mass function (IMF) for a mass-complete (log10(M$_*$/M$_\\odot$)~9.3) sample of 102 star-forming galaxies at z~2 using their H$\\alpha$ equivalent widths (H$\\alpha$-EW) and rest-frame optical colours. We compare dust-corrected H$\\alpha$-EW distributions with predictions of star-formation histories (SFH) from PEGASE.2 and Starburst99 synthetic stellar population models. We find an excess of high H$\\alpha$-EW galaxies that are up to 0.3--0.5 dex above the model-predicted Salpeter IMF locus and"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.04536","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":"2026-05-18T00:47:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nTZf30qOl36M7xYI8Z6sKkiJwo+KyckLH1965cBpGptt/+bpT3AUuNW8awBF+G3rkDo5pnyiVwUuqfCDVGKiCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T20:32:21.914308Z"},"content_sha256":"2ff4f1de91c824884f2b9f1ed4fbc35435d691c8b0be87eacb3d551a5b10f94b","schema_version":"1.0","event_id":"sha256:2ff4f1de91c824884f2b9f1ed4fbc35435d691c8b0be87eacb3d551a5b10f94b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OFPANXCEGBLVMABB3DPHQJUH2D/bundle.json","state_url":"https://pith.science/pith/OFPANXCEGBLVMABB3DPHQJUH2D/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OFPANXCEGBLVMABB3DPHQJUH2D/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":"2026-06-02T20:32:21Z","links":{"resolver":"https://pith.science/pith/OFPANXCEGBLVMABB3DPHQJUH2D","bundle":"https://pith.science/pith/OFPANXCEGBLVMABB3DPHQJUH2D/bundle.json","state":"https://pith.science/pith/OFPANXCEGBLVMABB3DPHQJUH2D/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OFPANXCEGBLVMABB3DPHQJUH2D/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:OFPANXCEGBLVMABB3DPHQJUH2D","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":"3692aa6672395bd012430a44233003ff3c541dc67242f34a50fd1d0ce84661af","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-03-13T18:00:14Z","title_canon_sha256":"9068300c2d37ef8845cfc7a1d2909d3c01fbd573a04938108d37db2108f1a538"},"schema_version":"1.0","source":{"id":"1703.04536","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.04536","created_at":"2026-05-18T00:47:25Z"},{"alias_kind":"arxiv_version","alias_value":"1703.04536v2","created_at":"2026-05-18T00:47:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.04536","created_at":"2026-05-18T00:47:25Z"},{"alias_kind":"pith_short_12","alias_value":"OFPANXCEGBLV","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"OFPANXCEGBLVMABB","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"OFPANXCE","created_at":"2026-05-18T12:31:34Z"}],"graph_snapshots":[{"event_id":"sha256:2ff4f1de91c824884f2b9f1ed4fbc35435d691c8b0be87eacb3d551a5b10f94b","target":"graph","created_at":"2026-05-18T00:47:25Z","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 use the ZFIRE survey (http://zfire.swinburne.edu.au) to investigate the high mass slope of the initial mass function (IMF) for a mass-complete (log10(M$_*$/M$_\\odot$)~9.3) sample of 102 star-forming galaxies at z~2 using their H$\\alpha$ equivalent widths (H$\\alpha$-EW) and rest-frame optical colours. We compare dust-corrected H$\\alpha$-EW distributions with predictions of star-formation histories (SFH) from PEGASE.2 and Starburst99 synthetic stellar population models. We find an excess of high H$\\alpha$-EW galaxies that are up to 0.3--0.5 dex above the model-predicted Salpeter IMF locus and","authors_text":"Adam Tomczak, Caroline Straatman, David B. Fisher, Glenn G. Kacprzak, Ivo Labbe, Karl Glazebrook, Kim-Vy Tran, Lee Spitler, Leo Alcorn, Lisa Kewley, Michael Cowley, Themiya Nanayakkara, Tiantian Yuan","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-03-13T18:00:14Z","title":"ZFIRE: Using H$\\alpha$ equivalent widths to investigate the in situ initial mass function at z~2"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.04536","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":"sha256:7ecb63f4bb8278c36cf77ccd6d908c020fa7802affbfc0fdd599cb5f62c01aa1","target":"record","created_at":"2026-05-18T00:47:25Z","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":"3692aa6672395bd012430a44233003ff3c541dc67242f34a50fd1d0ce84661af","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-03-13T18:00:14Z","title_canon_sha256":"9068300c2d37ef8845cfc7a1d2909d3c01fbd573a04938108d37db2108f1a538"},"schema_version":"1.0","source":{"id":"1703.04536","kind":"arxiv","version":2}},"canonical_sha256":"715e06dc443057560021d8de782687d0d55aab66716410d86fbd9455db357b82","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"715e06dc443057560021d8de782687d0d55aab66716410d86fbd9455db357b82","first_computed_at":"2026-05-18T00:47:25.996914Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:47:25.996914Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"EeabzSaRG9INhKH88yRHpD6xJGcg8xFSy1cYcrqSenUbSSzj5+DCMfXDjRc6LrDyWyq/XHrxvC1Hd7lVBR1ZAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:47:25.997647Z","signed_message":"canonical_sha256_bytes"},"source_id":"1703.04536","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7ecb63f4bb8278c36cf77ccd6d908c020fa7802affbfc0fdd599cb5f62c01aa1","sha256:2ff4f1de91c824884f2b9f1ed4fbc35435d691c8b0be87eacb3d551a5b10f94b"],"state_sha256":"f902a7229434bc0b65d4ab42dceec4129a0e212760aee5f919bd559deb47a5e7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6XJbzUGKKQ/vPFGbRhFbMOm79xAKa1kb9iAcnoZEJDLKK3q7CgMW34hWagtcIwz4SBzSm1hwoEPA3YIf5xxNBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T20:32:21.916289Z","bundle_sha256":"3e9578d4214cd1f065d1bf77ff0243e8939629fee3902252558a8e42bca8c6a4"}}