{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:LIQ3MSK4MUYVGOQLN7HVWW6R2P","short_pith_number":"pith:LIQ3MSK4","canonical_record":{"source":{"id":"1712.04953","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-12-13T19:00:22Z","cross_cats_sorted":[],"title_canon_sha256":"7d4a08d20adc71699b08869c45b07a8b7f27a4f1e53725b852d60ff1599eff01","abstract_canon_sha256":"1159b7f35f6f3a2672daae344ee484e5c75967b0b5a82299c3db51ade9b1ada6"},"schema_version":"1.0"},"canonical_sha256":"5a21b6495c6531533a0b6fcf5b5bd1d3d7c034d75fc3587c8958989c65e478c5","source":{"kind":"arxiv","id":"1712.04953","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1712.04953","created_at":"2026-05-18T00:22:23Z"},{"alias_kind":"arxiv_version","alias_value":"1712.04953v2","created_at":"2026-05-18T00:22:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.04953","created_at":"2026-05-18T00:22:23Z"},{"alias_kind":"pith_short_12","alias_value":"LIQ3MSK4MUYV","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_16","alias_value":"LIQ3MSK4MUYVGOQL","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_8","alias_value":"LIQ3MSK4","created_at":"2026-05-18T12:31:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:LIQ3MSK4MUYVGOQLN7HVWW6R2P","target":"record","payload":{"canonical_record":{"source":{"id":"1712.04953","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-12-13T19:00:22Z","cross_cats_sorted":[],"title_canon_sha256":"7d4a08d20adc71699b08869c45b07a8b7f27a4f1e53725b852d60ff1599eff01","abstract_canon_sha256":"1159b7f35f6f3a2672daae344ee484e5c75967b0b5a82299c3db51ade9b1ada6"},"schema_version":"1.0"},"canonical_sha256":"5a21b6495c6531533a0b6fcf5b5bd1d3d7c034d75fc3587c8958989c65e478c5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:22:23.583855Z","signature_b64":"okwAJkM5R9cwO7x3m4W2q0ifoPS6t3u/TpXvTc/u6PcVawRMPJ06aYiatiGWXgXd3CmImmaxzx+30ZCXS7fkBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5a21b6495c6531533a0b6fcf5b5bd1d3d7c034d75fc3587c8958989c65e478c5","last_reissued_at":"2026-05-18T00:22:23.583367Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:22:23.583367Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1712.04953","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":"2026-05-18T00:22:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DMgCQVxxi79tuZ0as9hvgBQ3aoocVeRl8wfNR3dJ2zVm3/6beUuY9UwOqqHD3An+tgRpJafTVkiUh19Dyg51Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T13:54:30.546688Z"},"content_sha256":"161a236f5ec28f8c0a015d36e52b88957a0afb56a345cc20f6ec45f8b6d1c812","schema_version":"1.0","event_id":"sha256:161a236f5ec28f8c0a015d36e52b88957a0afb56a345cc20f6ec45f8b6d1c812"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:LIQ3MSK4MUYVGOQLN7HVWW6R2P","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Abundance ratios in dwarf elliptical galaxies","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Boselli, A. Sybilska, A. Vazdekis, \\c{S}. \\c{S}en, C. Yesilyaprak, E. Laurikainen, E. Toloba, G. Hensler, G. van de Ven, H. Salo, J. Falc\\'on-Barroso, J. Janz, J. J. Mentz, M. den Brok, R. F. Peletier, S. Paudel, T. Lisker","submitted_at":"2017-12-13T19:00:22Z","abstract_excerpt":"We determine abundance ratios of 37 dwarf ellipticals (dEs) in the nearby Virgo cluster. This sample is representative of the early-type population of galaxies in the absolute magnitude range -19.0 < Mr < -16.0. We analyze their absorption line-strength indices by means of index-index diagrams and scaling relations and use the stellar population models to interpret them. We present ages, metallicities and abundance ratios obtained from these dEs within an aperture size of Re/8. We calculate [Na/Fe] from NaD, [Ca/Fe] from Ca4227 and [Mg/Fe] from Mgb. We find that [Na/Fe] is under-abundant with "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.04953","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":"2026-05-18T00:22:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BRBeFmc/J3/igeq44zkqFV7qjG5FFrfF4Q5CXEanSj62FIkB+O7CB0xkauhSxlA0lzXLLaNHr5+b7I/qyMQHDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T13:54:30.547019Z"},"content_sha256":"323964b0a9ce54717ce9d9d32b41cb70524372376b0dba4ad442b6c4f4146386","schema_version":"1.0","event_id":"sha256:323964b0a9ce54717ce9d9d32b41cb70524372376b0dba4ad442b6c4f4146386"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LIQ3MSK4MUYVGOQLN7HVWW6R2P/bundle.json","state_url":"https://pith.science/pith/LIQ3MSK4MUYVGOQLN7HVWW6R2P/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LIQ3MSK4MUYVGOQLN7HVWW6R2P/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":"2026-05-19T13:54:30Z","links":{"resolver":"https://pith.science/pith/LIQ3MSK4MUYVGOQLN7HVWW6R2P","bundle":"https://pith.science/pith/LIQ3MSK4MUYVGOQLN7HVWW6R2P/bundle.json","state":"https://pith.science/pith/LIQ3MSK4MUYVGOQLN7HVWW6R2P/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LIQ3MSK4MUYVGOQLN7HVWW6R2P/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:LIQ3MSK4MUYVGOQLN7HVWW6R2P","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":"1159b7f35f6f3a2672daae344ee484e5c75967b0b5a82299c3db51ade9b1ada6","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-12-13T19:00:22Z","title_canon_sha256":"7d4a08d20adc71699b08869c45b07a8b7f27a4f1e53725b852d60ff1599eff01"},"schema_version":"1.0","source":{"id":"1712.04953","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1712.04953","created_at":"2026-05-18T00:22:23Z"},{"alias_kind":"arxiv_version","alias_value":"1712.04953v2","created_at":"2026-05-18T00:22:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.04953","created_at":"2026-05-18T00:22:23Z"},{"alias_kind":"pith_short_12","alias_value":"LIQ3MSK4MUYV","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_16","alias_value":"LIQ3MSK4MUYVGOQL","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_8","alias_value":"LIQ3MSK4","created_at":"2026-05-18T12:31:28Z"}],"graph_snapshots":[{"event_id":"sha256:323964b0a9ce54717ce9d9d32b41cb70524372376b0dba4ad442b6c4f4146386","target":"graph","created_at":"2026-05-18T00:22:23Z","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 determine abundance ratios of 37 dwarf ellipticals (dEs) in the nearby Virgo cluster. This sample is representative of the early-type population of galaxies in the absolute magnitude range -19.0 < Mr < -16.0. We analyze their absorption line-strength indices by means of index-index diagrams and scaling relations and use the stellar population models to interpret them. We present ages, metallicities and abundance ratios obtained from these dEs within an aperture size of Re/8. We calculate [Na/Fe] from NaD, [Ca/Fe] from Ca4227 and [Mg/Fe] from Mgb. We find that [Na/Fe] is under-abundant with ","authors_text":"A. Boselli, A. Sybilska, A. Vazdekis, \\c{S}. \\c{S}en, C. Yesilyaprak, E. Laurikainen, E. Toloba, G. Hensler, G. van de Ven, H. Salo, J. Falc\\'on-Barroso, J. Janz, J. J. Mentz, M. den Brok, R. F. Peletier, S. Paudel, T. Lisker","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-12-13T19:00:22Z","title":"Abundance ratios in dwarf elliptical galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.04953","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":"sha256:161a236f5ec28f8c0a015d36e52b88957a0afb56a345cc20f6ec45f8b6d1c812","target":"record","created_at":"2026-05-18T00:22:23Z","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":"1159b7f35f6f3a2672daae344ee484e5c75967b0b5a82299c3db51ade9b1ada6","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-12-13T19:00:22Z","title_canon_sha256":"7d4a08d20adc71699b08869c45b07a8b7f27a4f1e53725b852d60ff1599eff01"},"schema_version":"1.0","source":{"id":"1712.04953","kind":"arxiv","version":2}},"canonical_sha256":"5a21b6495c6531533a0b6fcf5b5bd1d3d7c034d75fc3587c8958989c65e478c5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5a21b6495c6531533a0b6fcf5b5bd1d3d7c034d75fc3587c8958989c65e478c5","first_computed_at":"2026-05-18T00:22:23.583367Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:22:23.583367Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"okwAJkM5R9cwO7x3m4W2q0ifoPS6t3u/TpXvTc/u6PcVawRMPJ06aYiatiGWXgXd3CmImmaxzx+30ZCXS7fkBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:22:23.583855Z","signed_message":"canonical_sha256_bytes"},"source_id":"1712.04953","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:161a236f5ec28f8c0a015d36e52b88957a0afb56a345cc20f6ec45f8b6d1c812","sha256:323964b0a9ce54717ce9d9d32b41cb70524372376b0dba4ad442b6c4f4146386"],"state_sha256":"11d0c9689cdcd680655568c7640504c801038d12916d6b112e14ec78cc5ee153"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hb71t+DRjsXw08JvOiWJC9Gd8ZQ3eTNTBszt9BF7ff657epUUtTk876g5KRnPAyTJ2woGKlrG7X7ybgcdJPtAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-19T13:54:30.548949Z","bundle_sha256":"204e08b2d6d8712fbb0a2a54a0d3d3dd03231983883868cd9120a7abede7f889"}}