{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:ZKQXTM5TYY764X2AO2NOCXM4XD","short_pith_number":"pith:ZKQXTM5T","canonical_record":{"source":{"id":"0910.1603","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-10-08T20:19:32Z","cross_cats_sorted":[],"title_canon_sha256":"dd39f31249b89dea425c584e86fe5e3f2638759f72329d6020ec7f5972295845","abstract_canon_sha256":"8238686a6426e96da7ffb879672a4e98d4d6bbf5702c5af3e25392365ae1dc9a"},"schema_version":"1.0"},"canonical_sha256":"caa179b3b3c63fee5f40769ae15d9cb8edc4b30244a042427b356c81da17a80e","source":{"kind":"arxiv","id":"0910.1603","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.1603","created_at":"2026-05-18T02:34:19Z"},{"alias_kind":"arxiv_version","alias_value":"0910.1603v1","created_at":"2026-05-18T02:34:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.1603","created_at":"2026-05-18T02:34:19Z"},{"alias_kind":"pith_short_12","alias_value":"ZKQXTM5TYY76","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"ZKQXTM5TYY764X2A","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"ZKQXTM5T","created_at":"2026-05-18T12:26:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:ZKQXTM5TYY764X2AO2NOCXM4XD","target":"record","payload":{"canonical_record":{"source":{"id":"0910.1603","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-10-08T20:19:32Z","cross_cats_sorted":[],"title_canon_sha256":"dd39f31249b89dea425c584e86fe5e3f2638759f72329d6020ec7f5972295845","abstract_canon_sha256":"8238686a6426e96da7ffb879672a4e98d4d6bbf5702c5af3e25392365ae1dc9a"},"schema_version":"1.0"},"canonical_sha256":"caa179b3b3c63fee5f40769ae15d9cb8edc4b30244a042427b356c81da17a80e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:34:19.565736Z","signature_b64":"5DK/uo5aoBA+FbUfHk8GgpSDbU442paf/+7kyoPS7REbBDDeT/WR+H2bxJbkT6bfSsNERGYlVfaiudOiUlFhAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"caa179b3b3c63fee5f40769ae15d9cb8edc4b30244a042427b356c81da17a80e","last_reissued_at":"2026-05-18T02:34:19.565282Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:34:19.565282Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0910.1603","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":"2026-05-18T02:34:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YcPxpn6Fl7uBDm2BWbVgnn/6zHb0RyWeTuF67dsIbap1NrnuE5gUcKK0jQuXD5Jnm13X/t2laxzzcCfOr0+IDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T19:15:57.983704Z"},"content_sha256":"1c1a7c520025d9242af325f4dd15b4cbc2183a83b0c6ecad8af57c059f8d57e1","schema_version":"1.0","event_id":"sha256:1c1a7c520025d9242af325f4dd15b4cbc2183a83b0c6ecad8af57c059f8d57e1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:ZKQXTM5TYY764X2AO2NOCXM4XD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Emission and Absorption Properties of Low-Mass Type 2 Active Galaxies with XMM-Newton","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. J. Barth (UC-Irvine), C.E. Thornton (UC-Irvine), J. E. Greene (Princeton), L. C. Ho (Carnegie)","submitted_at":"2009-10-08T20:19:32Z","abstract_excerpt":"We present XMM-Newton observations of four low-redshift Seyfert galaxies selected to have low host luminosities (M_g>-20 mag) and small stellar velocity dispersions (sigma_star<45 km/s), which are among the smallest stellar velocity dispersions found in any active galaxies. These galaxies show weak or no broad optical emission lines and have likely black hole masses <10^6 M_sun. Three out of four objects were detected with >3sigma significance in ~25 ks exposures and two observations had high enough signal-to-noise ratios for rudimentary spectral analysis. We calculate hardness ratios (-0.43 t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.1603","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":"2026-05-18T02:34:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JTGiBsclSnQ/q2jTMHYewzD4zYR9YJ+ikAqf2p/kaAXFOgHWQhdZ9Ys07cUwm/2AmIv7zr4Ac9MBcJHYkRydAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T19:15:57.984365Z"},"content_sha256":"3f2b32ede3d56e211e879caf4fea3404aea05ad14901f36accceaf3d8998fd4e","schema_version":"1.0","event_id":"sha256:3f2b32ede3d56e211e879caf4fea3404aea05ad14901f36accceaf3d8998fd4e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZKQXTM5TYY764X2AO2NOCXM4XD/bundle.json","state_url":"https://pith.science/pith/ZKQXTM5TYY764X2AO2NOCXM4XD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZKQXTM5TYY764X2AO2NOCXM4XD/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":"2026-06-06T19:15:57Z","links":{"resolver":"https://pith.science/pith/ZKQXTM5TYY764X2AO2NOCXM4XD","bundle":"https://pith.science/pith/ZKQXTM5TYY764X2AO2NOCXM4XD/bundle.json","state":"https://pith.science/pith/ZKQXTM5TYY764X2AO2NOCXM4XD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZKQXTM5TYY764X2AO2NOCXM4XD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:ZKQXTM5TYY764X2AO2NOCXM4XD","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":"8238686a6426e96da7ffb879672a4e98d4d6bbf5702c5af3e25392365ae1dc9a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-10-08T20:19:32Z","title_canon_sha256":"dd39f31249b89dea425c584e86fe5e3f2638759f72329d6020ec7f5972295845"},"schema_version":"1.0","source":{"id":"0910.1603","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.1603","created_at":"2026-05-18T02:34:19Z"},{"alias_kind":"arxiv_version","alias_value":"0910.1603v1","created_at":"2026-05-18T02:34:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.1603","created_at":"2026-05-18T02:34:19Z"},{"alias_kind":"pith_short_12","alias_value":"ZKQXTM5TYY76","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"ZKQXTM5TYY764X2A","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"ZKQXTM5T","created_at":"2026-05-18T12:26:02Z"}],"graph_snapshots":[{"event_id":"sha256:3f2b32ede3d56e211e879caf4fea3404aea05ad14901f36accceaf3d8998fd4e","target":"graph","created_at":"2026-05-18T02:34:19Z","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 XMM-Newton observations of four low-redshift Seyfert galaxies selected to have low host luminosities (M_g>-20 mag) and small stellar velocity dispersions (sigma_star<45 km/s), which are among the smallest stellar velocity dispersions found in any active galaxies. These galaxies show weak or no broad optical emission lines and have likely black hole masses <10^6 M_sun. Three out of four objects were detected with >3sigma significance in ~25 ks exposures and two observations had high enough signal-to-noise ratios for rudimentary spectral analysis. We calculate hardness ratios (-0.43 t","authors_text":"A. J. Barth (UC-Irvine), C.E. Thornton (UC-Irvine), J. E. Greene (Princeton), L. C. Ho (Carnegie)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-10-08T20:19:32Z","title":"Emission and Absorption Properties of Low-Mass Type 2 Active Galaxies with XMM-Newton"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.1603","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":"sha256:1c1a7c520025d9242af325f4dd15b4cbc2183a83b0c6ecad8af57c059f8d57e1","target":"record","created_at":"2026-05-18T02:34:19Z","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":"8238686a6426e96da7ffb879672a4e98d4d6bbf5702c5af3e25392365ae1dc9a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-10-08T20:19:32Z","title_canon_sha256":"dd39f31249b89dea425c584e86fe5e3f2638759f72329d6020ec7f5972295845"},"schema_version":"1.0","source":{"id":"0910.1603","kind":"arxiv","version":1}},"canonical_sha256":"caa179b3b3c63fee5f40769ae15d9cb8edc4b30244a042427b356c81da17a80e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"caa179b3b3c63fee5f40769ae15d9cb8edc4b30244a042427b356c81da17a80e","first_computed_at":"2026-05-18T02:34:19.565282Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:34:19.565282Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5DK/uo5aoBA+FbUfHk8GgpSDbU442paf/+7kyoPS7REbBDDeT/WR+H2bxJbkT6bfSsNERGYlVfaiudOiUlFhAA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:34:19.565736Z","signed_message":"canonical_sha256_bytes"},"source_id":"0910.1603","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1c1a7c520025d9242af325f4dd15b4cbc2183a83b0c6ecad8af57c059f8d57e1","sha256:3f2b32ede3d56e211e879caf4fea3404aea05ad14901f36accceaf3d8998fd4e"],"state_sha256":"08173f36681b8d59ef95aff5801b549528ba1900b39b6b2e5d1b43df024b9345"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eMYtgN+UK8umYLH7fstBsaVTth1IWJ3APBXqGBLItyglDl1LkzasQwI1d9L+S90dk+tAWTBfB1wOQHSxHTvcBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T19:15:57.988325Z","bundle_sha256":"a1dd3f762ca6feb103cc336e25650c88f2e0032e0e93578937c24d68c025ec0c"}}