{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:ZF7OH4KGPF4HJCQQDX6KEUGETP","short_pith_number":"pith:ZF7OH4KG","canonical_record":{"source":{"id":"0907.4155","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-07-23T20:00:17Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"f1324ad8074e19c2b778d069cab3a728822f673a205535103374da8c4c841c3c","abstract_canon_sha256":"1be36aa1bfd773fde941cbc7e8509ade48ee800e1fe74797fceb1f8fa8709e91"},"schema_version":"1.0"},"canonical_sha256":"c97ee3f1467978748a101dfca250c49bceb4db0b8077f9173e0bc2dbcec18cce","source":{"kind":"arxiv","id":"0907.4155","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0907.4155","created_at":"2026-05-18T02:12:54Z"},{"alias_kind":"arxiv_version","alias_value":"0907.4155v1","created_at":"2026-05-18T02:12:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0907.4155","created_at":"2026-05-18T02:12:54Z"},{"alias_kind":"pith_short_12","alias_value":"ZF7OH4KGPF4H","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"ZF7OH4KGPF4HJCQQ","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"ZF7OH4KG","created_at":"2026-05-18T12:26:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:ZF7OH4KGPF4HJCQQDX6KEUGETP","target":"record","payload":{"canonical_record":{"source":{"id":"0907.4155","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-07-23T20:00:17Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"f1324ad8074e19c2b778d069cab3a728822f673a205535103374da8c4c841c3c","abstract_canon_sha256":"1be36aa1bfd773fde941cbc7e8509ade48ee800e1fe74797fceb1f8fa8709e91"},"schema_version":"1.0"},"canonical_sha256":"c97ee3f1467978748a101dfca250c49bceb4db0b8077f9173e0bc2dbcec18cce","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:12:54.173488Z","signature_b64":"D64aAhJ/oG9sW6knpLynxJkwjzaRgzVbZACA24LM2CG6bOck+Ei+G2dswXE2bd/o6JhLXDyzqgn3lGcWnNYOAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c97ee3f1467978748a101dfca250c49bceb4db0b8077f9173e0bc2dbcec18cce","last_reissued_at":"2026-05-18T02:12:54.172805Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:12:54.172805Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0907.4155","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":"2026-05-18T02:12:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+aUtqgZp/GEl9ypCnm8xOmkK3CIHzWkgtyAPfbzuFgNXDUlf+kHcuYHvwHYQ9cpqSZ2MdkmhDZvWll20f5q7CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T19:08:52.322617Z"},"content_sha256":"e9d06c680219cf095acf27bd29c63c33e1e84b498c16560c4169625b6de4fb38","schema_version":"1.0","event_id":"sha256:e9d06c680219cf095acf27bd29c63c33e1e84b498c16560c4169625b6de4fb38"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:ZF7OH4KGPF4HJCQQDX6KEUGETP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Galaxy Zoo Green Peas: Discovery of A Class of Compact Extremely Star-Forming Galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"Alex Szalay, Anze Slosar, Carolin N. Cardamone, Chris Lintott, C. M. Urry, Dan Andreescu, Daniel Thomas, Jan vandenBerg, John Parejko, Kevin Schawinski, Marc Sarzi, M. Jordan Raddick, Nicola Bennert, Phil Murray, Robert C. Nichol, Steven P. Bamford, William C. Keel","submitted_at":"2009-07-23T20:00:17Z","abstract_excerpt":"We investigate a class of rapidly growing emission line galaxies, known as \"Green Peas\", first noted by volunteers in the Galaxy Zoo project because of their peculiar bright green colour and small size, unresolved in SDSS imaging. Their appearance is due to very strong optical emission lines, namely [O III] 5007 A, with an unusually large equivalent width of up to ~1000 A. We discuss a well-defined sample of 251 colour-selected objects, most of which are strongly star forming, although there are some AGN interlopers including 8 newly discovered narrow Line Seyfert 1 galaxies. The star-forming "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0907.4155","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":"2026-05-18T02:12:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5Y+P/wClt5uoZWEzChoyLwbKvSQue9l9huXJesCATbgDrWHP9UhCN3rPHiLqOXBpMoZv2DWa5Iphz6f2wlcYBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T19:08:52.323296Z"},"content_sha256":"fae240e82e9c5eeeb0be26fc4868b4effa71f5aca48d36e8cb86f538c6aa0c0e","schema_version":"1.0","event_id":"sha256:fae240e82e9c5eeeb0be26fc4868b4effa71f5aca48d36e8cb86f538c6aa0c0e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZF7OH4KGPF4HJCQQDX6KEUGETP/bundle.json","state_url":"https://pith.science/pith/ZF7OH4KGPF4HJCQQDX6KEUGETP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZF7OH4KGPF4HJCQQDX6KEUGETP/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":"2026-05-26T19:08:52Z","links":{"resolver":"https://pith.science/pith/ZF7OH4KGPF4HJCQQDX6KEUGETP","bundle":"https://pith.science/pith/ZF7OH4KGPF4HJCQQDX6KEUGETP/bundle.json","state":"https://pith.science/pith/ZF7OH4KGPF4HJCQQDX6KEUGETP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZF7OH4KGPF4HJCQQDX6KEUGETP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:ZF7OH4KGPF4HJCQQDX6KEUGETP","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":"1be36aa1bfd773fde941cbc7e8509ade48ee800e1fe74797fceb1f8fa8709e91","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-07-23T20:00:17Z","title_canon_sha256":"f1324ad8074e19c2b778d069cab3a728822f673a205535103374da8c4c841c3c"},"schema_version":"1.0","source":{"id":"0907.4155","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0907.4155","created_at":"2026-05-18T02:12:54Z"},{"alias_kind":"arxiv_version","alias_value":"0907.4155v1","created_at":"2026-05-18T02:12:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0907.4155","created_at":"2026-05-18T02:12:54Z"},{"alias_kind":"pith_short_12","alias_value":"ZF7OH4KGPF4H","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"ZF7OH4KGPF4HJCQQ","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"ZF7OH4KG","created_at":"2026-05-18T12:26:02Z"}],"graph_snapshots":[{"event_id":"sha256:fae240e82e9c5eeeb0be26fc4868b4effa71f5aca48d36e8cb86f538c6aa0c0e","target":"graph","created_at":"2026-05-18T02:12:54Z","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 investigate a class of rapidly growing emission line galaxies, known as \"Green Peas\", first noted by volunteers in the Galaxy Zoo project because of their peculiar bright green colour and small size, unresolved in SDSS imaging. Their appearance is due to very strong optical emission lines, namely [O III] 5007 A, with an unusually large equivalent width of up to ~1000 A. We discuss a well-defined sample of 251 colour-selected objects, most of which are strongly star forming, although there are some AGN interlopers including 8 newly discovered narrow Line Seyfert 1 galaxies. The star-forming ","authors_text":"Alex Szalay, Anze Slosar, Carolin N. Cardamone, Chris Lintott, C. M. Urry, Dan Andreescu, Daniel Thomas, Jan vandenBerg, John Parejko, Kevin Schawinski, Marc Sarzi, M. Jordan Raddick, Nicola Bennert, Phil Murray, Robert C. Nichol, Steven P. Bamford, William C. Keel","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-07-23T20:00:17Z","title":"Galaxy Zoo Green Peas: Discovery of A Class of Compact Extremely Star-Forming Galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0907.4155","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:e9d06c680219cf095acf27bd29c63c33e1e84b498c16560c4169625b6de4fb38","target":"record","created_at":"2026-05-18T02:12:54Z","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":"1be36aa1bfd773fde941cbc7e8509ade48ee800e1fe74797fceb1f8fa8709e91","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-07-23T20:00:17Z","title_canon_sha256":"f1324ad8074e19c2b778d069cab3a728822f673a205535103374da8c4c841c3c"},"schema_version":"1.0","source":{"id":"0907.4155","kind":"arxiv","version":1}},"canonical_sha256":"c97ee3f1467978748a101dfca250c49bceb4db0b8077f9173e0bc2dbcec18cce","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c97ee3f1467978748a101dfca250c49bceb4db0b8077f9173e0bc2dbcec18cce","first_computed_at":"2026-05-18T02:12:54.172805Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:12:54.172805Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"D64aAhJ/oG9sW6knpLynxJkwjzaRgzVbZACA24LM2CG6bOck+Ei+G2dswXE2bd/o6JhLXDyzqgn3lGcWnNYOAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:12:54.173488Z","signed_message":"canonical_sha256_bytes"},"source_id":"0907.4155","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e9d06c680219cf095acf27bd29c63c33e1e84b498c16560c4169625b6de4fb38","sha256:fae240e82e9c5eeeb0be26fc4868b4effa71f5aca48d36e8cb86f538c6aa0c0e"],"state_sha256":"81714bb33ea27ad1120a521e311ac3d871eea70495c69de50d9fb8b5262bf679"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IRrVUhHibXMsYONnHayP17tuBQREAgg5iNujX7yu4FyHSX5mq7R1IwuN53yRKKopBCzNEkw0FB9VMiRAqhRZCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T19:08:52.326007Z","bundle_sha256":"d5d95b41e3bb2372122589f8653bdecf89a47401478968b51272caa43d4a7b53"}}