{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:L5HYNDOZJ22WQITXPPUBFDNYOG","short_pith_number":"pith:L5HYNDOZ","canonical_record":{"source":{"id":"1808.09283","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-08-27T03:05:37Z","cross_cats_sorted":[],"title_canon_sha256":"9b3c737800d23a76ea26d05d33e88d86d0c89fd028b3ac6cbc9b9286f7dc3232","abstract_canon_sha256":"dec6c7255892854dca18da2b984717139fef60275855488a022eb9d032b8a447"},"schema_version":"1.0"},"canonical_sha256":"5f4f868dd94eb56822777be8128db87195c39e4cf248f581d63942d5fdd110d1","source":{"kind":"arxiv","id":"1808.09283","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.09283","created_at":"2026-05-18T00:06:00Z"},{"alias_kind":"arxiv_version","alias_value":"1808.09283v1","created_at":"2026-05-18T00:06:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.09283","created_at":"2026-05-18T00:06:00Z"},{"alias_kind":"pith_short_12","alias_value":"L5HYNDOZJ22W","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_16","alias_value":"L5HYNDOZJ22WQITX","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_8","alias_value":"L5HYNDOZ","created_at":"2026-05-18T12:32:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:L5HYNDOZJ22WQITXPPUBFDNYOG","target":"record","payload":{"canonical_record":{"source":{"id":"1808.09283","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-08-27T03:05:37Z","cross_cats_sorted":[],"title_canon_sha256":"9b3c737800d23a76ea26d05d33e88d86d0c89fd028b3ac6cbc9b9286f7dc3232","abstract_canon_sha256":"dec6c7255892854dca18da2b984717139fef60275855488a022eb9d032b8a447"},"schema_version":"1.0"},"canonical_sha256":"5f4f868dd94eb56822777be8128db87195c39e4cf248f581d63942d5fdd110d1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:06:00.957029Z","signature_b64":"wyGwwYLxjAmakuEDeRhwb0Po8UwVfrzPKfI2eB1ZEY/gbovFHhQL/73nu05l84BXhQfE8dIcKWi8HU/pg5nmCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5f4f868dd94eb56822777be8128db87195c39e4cf248f581d63942d5fdd110d1","last_reissued_at":"2026-05-18T00:06:00.956638Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:06:00.956638Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1808.09283","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":"2026-05-18T00:06:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HGXbmPHBLekht6GfFxdRh/5nYkuknQLSK5PAd3NyLdLFqh1SDgATMnjrYvwrX85+zmnT1vblEllB+cFwXag2AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T18:26:24.920874Z"},"content_sha256":"60eaa000a1dac4445fcc54a902b8d4f766c0e7e1d44df0fdcb58427c0dd814b3","schema_version":"1.0","event_id":"sha256:60eaa000a1dac4445fcc54a902b8d4f766c0e7e1d44df0fdcb58427c0dd814b3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:L5HYNDOZJ22WQITXPPUBFDNYOG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Studying Quasar Absorber Host Galaxy Properties Using Image Stacking Technique","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Bill Zhu, Jian Ge, Jingzhe Ma, Yinan Zhao","submitted_at":"2018-08-27T03:05:37Z","abstract_excerpt":"Studying the stellar mass, age, luminosity, star-formation rate, and impact parameter of quasar absorber host galaxies can aid in the understanding of galaxy formation and evolution as well as in testing their models. We derive the Spectral Energy Distribution (SED) and impact parameter limits of low redshift ($z_{abs} = 0.37 - 0.55$) Mg II absorbers and of higher redshift ($z_{abs} = 1.0 - 2.5$) 2175 \\AA\\ dust absorbers (2DAs). We use an imaging stacking technique to statistically boost the signal-to-noise ratio (SNR) to increase detection of the absorber host galaxies. The point spread funct"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.09283","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":"2026-05-18T00:06:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"y2yXkqQN4FSYn2veVbwWimEzzPJsKpRbU5qV/lQf1eprbI3M1wVTXBxf26T+F3cqzYOmhQOoio1F0UJ4rVgUAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T18:26:24.921219Z"},"content_sha256":"017252384a1b00664f80030569edab90c4bd1a52284a7fe65f56a90a85266a9e","schema_version":"1.0","event_id":"sha256:017252384a1b00664f80030569edab90c4bd1a52284a7fe65f56a90a85266a9e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/L5HYNDOZJ22WQITXPPUBFDNYOG/bundle.json","state_url":"https://pith.science/pith/L5HYNDOZJ22WQITXPPUBFDNYOG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/L5HYNDOZJ22WQITXPPUBFDNYOG/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":"2026-06-04T18:26:24Z","links":{"resolver":"https://pith.science/pith/L5HYNDOZJ22WQITXPPUBFDNYOG","bundle":"https://pith.science/pith/L5HYNDOZJ22WQITXPPUBFDNYOG/bundle.json","state":"https://pith.science/pith/L5HYNDOZJ22WQITXPPUBFDNYOG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/L5HYNDOZJ22WQITXPPUBFDNYOG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:L5HYNDOZJ22WQITXPPUBFDNYOG","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":"dec6c7255892854dca18da2b984717139fef60275855488a022eb9d032b8a447","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-08-27T03:05:37Z","title_canon_sha256":"9b3c737800d23a76ea26d05d33e88d86d0c89fd028b3ac6cbc9b9286f7dc3232"},"schema_version":"1.0","source":{"id":"1808.09283","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.09283","created_at":"2026-05-18T00:06:00Z"},{"alias_kind":"arxiv_version","alias_value":"1808.09283v1","created_at":"2026-05-18T00:06:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.09283","created_at":"2026-05-18T00:06:00Z"},{"alias_kind":"pith_short_12","alias_value":"L5HYNDOZJ22W","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_16","alias_value":"L5HYNDOZJ22WQITX","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_8","alias_value":"L5HYNDOZ","created_at":"2026-05-18T12:32:33Z"}],"graph_snapshots":[{"event_id":"sha256:017252384a1b00664f80030569edab90c4bd1a52284a7fe65f56a90a85266a9e","target":"graph","created_at":"2026-05-18T00:06:00Z","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":"Studying the stellar mass, age, luminosity, star-formation rate, and impact parameter of quasar absorber host galaxies can aid in the understanding of galaxy formation and evolution as well as in testing their models. We derive the Spectral Energy Distribution (SED) and impact parameter limits of low redshift ($z_{abs} = 0.37 - 0.55$) Mg II absorbers and of higher redshift ($z_{abs} = 1.0 - 2.5$) 2175 \\AA\\ dust absorbers (2DAs). We use an imaging stacking technique to statistically boost the signal-to-noise ratio (SNR) to increase detection of the absorber host galaxies. The point spread funct","authors_text":"Bill Zhu, Jian Ge, Jingzhe Ma, Yinan Zhao","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-08-27T03:05:37Z","title":"Studying Quasar Absorber Host Galaxy Properties Using Image Stacking Technique"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.09283","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":"sha256:60eaa000a1dac4445fcc54a902b8d4f766c0e7e1d44df0fdcb58427c0dd814b3","target":"record","created_at":"2026-05-18T00:06:00Z","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":"dec6c7255892854dca18da2b984717139fef60275855488a022eb9d032b8a447","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-08-27T03:05:37Z","title_canon_sha256":"9b3c737800d23a76ea26d05d33e88d86d0c89fd028b3ac6cbc9b9286f7dc3232"},"schema_version":"1.0","source":{"id":"1808.09283","kind":"arxiv","version":1}},"canonical_sha256":"5f4f868dd94eb56822777be8128db87195c39e4cf248f581d63942d5fdd110d1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5f4f868dd94eb56822777be8128db87195c39e4cf248f581d63942d5fdd110d1","first_computed_at":"2026-05-18T00:06:00.956638Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:06:00.956638Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wyGwwYLxjAmakuEDeRhwb0Po8UwVfrzPKfI2eB1ZEY/gbovFHhQL/73nu05l84BXhQfE8dIcKWi8HU/pg5nmCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:06:00.957029Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.09283","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:60eaa000a1dac4445fcc54a902b8d4f766c0e7e1d44df0fdcb58427c0dd814b3","sha256:017252384a1b00664f80030569edab90c4bd1a52284a7fe65f56a90a85266a9e"],"state_sha256":"0fcea320bba49d843b4bea93b2d52491510da0799ea4b21b612270a0cfef9b77"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"r3C1/+iOMAtakaGF0+qu6MEhAtoVNwcIKteCZKucqro5FIOB7FNycLUiZ2BK5ozMO/CICZShzqWDra1GrxHQCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T18:26:24.923247Z","bundle_sha256":"dbd6723529e30a67c71bc17e3628c3a5108c333d10fd59e391bfcc75ac11f4fa"}}