{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:QJ2I2B4WW3V5JNJSNQKVRSF36W","short_pith_number":"pith:QJ2I2B4W","canonical_record":{"source":{"id":"0903.4937","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-03-28T04:20:41Z","cross_cats_sorted":[],"title_canon_sha256":"22f7cd5e75fc8f5c1e39b18cb2752a7e84d058a933b93c8f242443dbc82ebce2","abstract_canon_sha256":"0d3906f789709fe107382774c20576c7526a751de83d52710e370ae3b7988496"},"schema_version":"1.0"},"canonical_sha256":"82748d0796b6ebd4b5326c1558c8bbf5a34461b5cda5f8527a134459c8188222","source":{"kind":"arxiv","id":"0903.4937","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0903.4937","created_at":"2026-05-18T02:14:18Z"},{"alias_kind":"arxiv_version","alias_value":"0903.4937v2","created_at":"2026-05-18T02:14:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0903.4937","created_at":"2026-05-18T02:14:18Z"},{"alias_kind":"pith_short_12","alias_value":"QJ2I2B4WW3V5","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"QJ2I2B4WW3V5JNJS","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"QJ2I2B4W","created_at":"2026-05-18T12:26:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:QJ2I2B4WW3V5JNJSNQKVRSF36W","target":"record","payload":{"canonical_record":{"source":{"id":"0903.4937","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-03-28T04:20:41Z","cross_cats_sorted":[],"title_canon_sha256":"22f7cd5e75fc8f5c1e39b18cb2752a7e84d058a933b93c8f242443dbc82ebce2","abstract_canon_sha256":"0d3906f789709fe107382774c20576c7526a751de83d52710e370ae3b7988496"},"schema_version":"1.0"},"canonical_sha256":"82748d0796b6ebd4b5326c1558c8bbf5a34461b5cda5f8527a134459c8188222","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:14:18.890885Z","signature_b64":"yw3ecP0Lr4Fm90lYfrVjc1602RAHsu+2j1Y2aNW6e19rBq23uyWO4TEsrRmQEdxBqr7wvZ/HBErv8ruQLhG/Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"82748d0796b6ebd4b5326c1558c8bbf5a34461b5cda5f8527a134459c8188222","last_reissued_at":"2026-05-18T02:14:18.890164Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:14:18.890164Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0903.4937","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":"2026-05-18T02:14:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Jsyj7Y590uzQhB0zUxet7YF37hUIOhk5PDHeOrGQm7lVbqDn/yB9ChV34xwFsAnNGl4JMzJ2ohNYDs2t5gHkAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T10:44:56.022062Z"},"content_sha256":"e9f14b2bb50910a6ca793918dcd5f18d4f32d8aa5a243ba09cd17bdb1be2f5af","schema_version":"1.0","event_id":"sha256:e9f14b2bb50910a6ca793918dcd5f18d4f32d8aa5a243ba09cd17bdb1be2f5af"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:QJ2I2B4WW3V5JNJSNQKVRSF36W","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Galaxy Zoo: the fraction of merging galaxies in the SDSS and their morphologies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Slosar, A. S. Szalay, C. J. Lintott, D. Andreescu, D. Thomas, D. W. Darg, J. Silk, J. Vandenberg, K. Schawinski, M. J. Raddick, M. Sarzi, P. Murray, R. C. Nichol, R. Proctor, S. Bamford, S. Kaviraj","submitted_at":"2009-03-28T04:20:41Z","abstract_excerpt":"We present the largest, most homogeneous catalogue of merging galaxies in the nearby universe obtained through the Galaxy Zoo project - an interface on the world-wide web enabling large-scale morphological classification of galaxies through visual inspection of images from the Sloan Digital Sky Survey (SDSS). The method converts a set of visually-inspected classifications for each galaxy into a single parameter (the `weighted-merger-vote fraction,' $f_m$) which describes our confidence that the system is part of an ongoing merger. We describe how $f_m$ is used to create a catalogue of 3003 vis"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0903.4937","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":"2026-05-18T02:14:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PXj5wyCP6AtShc28f2fkqYGDByP2K0G7VYsJSXAhz2uc9/SsFg5pJTFr4LZqQWrnD4SpbJ+vu34wMJfL4BLOBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T10:44:56.022461Z"},"content_sha256":"3c9946f9bae5a5d5db7476f36ab309b3fdf2e4ac2697de79979781154b4c220b","schema_version":"1.0","event_id":"sha256:3c9946f9bae5a5d5db7476f36ab309b3fdf2e4ac2697de79979781154b4c220b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QJ2I2B4WW3V5JNJSNQKVRSF36W/bundle.json","state_url":"https://pith.science/pith/QJ2I2B4WW3V5JNJSNQKVRSF36W/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QJ2I2B4WW3V5JNJSNQKVRSF36W/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":"2026-06-04T10:44:56Z","links":{"resolver":"https://pith.science/pith/QJ2I2B4WW3V5JNJSNQKVRSF36W","bundle":"https://pith.science/pith/QJ2I2B4WW3V5JNJSNQKVRSF36W/bundle.json","state":"https://pith.science/pith/QJ2I2B4WW3V5JNJSNQKVRSF36W/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QJ2I2B4WW3V5JNJSNQKVRSF36W/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:QJ2I2B4WW3V5JNJSNQKVRSF36W","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":"0d3906f789709fe107382774c20576c7526a751de83d52710e370ae3b7988496","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-03-28T04:20:41Z","title_canon_sha256":"22f7cd5e75fc8f5c1e39b18cb2752a7e84d058a933b93c8f242443dbc82ebce2"},"schema_version":"1.0","source":{"id":"0903.4937","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0903.4937","created_at":"2026-05-18T02:14:18Z"},{"alias_kind":"arxiv_version","alias_value":"0903.4937v2","created_at":"2026-05-18T02:14:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0903.4937","created_at":"2026-05-18T02:14:18Z"},{"alias_kind":"pith_short_12","alias_value":"QJ2I2B4WW3V5","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"QJ2I2B4WW3V5JNJS","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"QJ2I2B4W","created_at":"2026-05-18T12:26:01Z"}],"graph_snapshots":[{"event_id":"sha256:3c9946f9bae5a5d5db7476f36ab309b3fdf2e4ac2697de79979781154b4c220b","target":"graph","created_at":"2026-05-18T02:14:18Z","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 the largest, most homogeneous catalogue of merging galaxies in the nearby universe obtained through the Galaxy Zoo project - an interface on the world-wide web enabling large-scale morphological classification of galaxies through visual inspection of images from the Sloan Digital Sky Survey (SDSS). The method converts a set of visually-inspected classifications for each galaxy into a single parameter (the `weighted-merger-vote fraction,' $f_m$) which describes our confidence that the system is part of an ongoing merger. We describe how $f_m$ is used to create a catalogue of 3003 vis","authors_text":"A. Slosar, A. S. Szalay, C. J. Lintott, D. Andreescu, D. Thomas, D. W. Darg, J. Silk, J. Vandenberg, K. Schawinski, M. J. Raddick, M. Sarzi, P. Murray, R. C. Nichol, R. Proctor, S. Bamford, S. Kaviraj","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-03-28T04:20:41Z","title":"Galaxy Zoo: the fraction of merging galaxies in the SDSS and their morphologies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0903.4937","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:e9f14b2bb50910a6ca793918dcd5f18d4f32d8aa5a243ba09cd17bdb1be2f5af","target":"record","created_at":"2026-05-18T02:14:18Z","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":"0d3906f789709fe107382774c20576c7526a751de83d52710e370ae3b7988496","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2009-03-28T04:20:41Z","title_canon_sha256":"22f7cd5e75fc8f5c1e39b18cb2752a7e84d058a933b93c8f242443dbc82ebce2"},"schema_version":"1.0","source":{"id":"0903.4937","kind":"arxiv","version":2}},"canonical_sha256":"82748d0796b6ebd4b5326c1558c8bbf5a34461b5cda5f8527a134459c8188222","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"82748d0796b6ebd4b5326c1558c8bbf5a34461b5cda5f8527a134459c8188222","first_computed_at":"2026-05-18T02:14:18.890164Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:14:18.890164Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yw3ecP0Lr4Fm90lYfrVjc1602RAHsu+2j1Y2aNW6e19rBq23uyWO4TEsrRmQEdxBqr7wvZ/HBErv8ruQLhG/Dw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:14:18.890885Z","signed_message":"canonical_sha256_bytes"},"source_id":"0903.4937","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e9f14b2bb50910a6ca793918dcd5f18d4f32d8aa5a243ba09cd17bdb1be2f5af","sha256:3c9946f9bae5a5d5db7476f36ab309b3fdf2e4ac2697de79979781154b4c220b"],"state_sha256":"60c6f4825c551aefa621bb4fc561fc2ecb5c9c563b3f03adcbdbfa4ee84c225e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M/1DiCAjCBDhi9jLN0T3MCMhFNjKvbeT0CntdIXCOa3obMltfamSYSRpQj+EqkcGLZSvFUt92eOE2JN0Azx/DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T10:44:56.024416Z","bundle_sha256":"28dcf410fa62b137e1affbbd5e5f1443134f3aca12c2d4375dae427cb419ddf1"}}