{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:PO27MWW6WMUZKTDJFYLZ442DC3","short_pith_number":"pith:PO27MWW6","canonical_record":{"source":{"id":"2209.02784","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-09-06T19:06:25Z","cross_cats_sorted":["astro-ph.HE","astro-ph.SR"],"title_canon_sha256":"0c3202e34e6b5f029c348a315437c0b89d505bd7f1c58d35a182c1a180e11c26","abstract_canon_sha256":"3ba3ce24183e4c85a7ca1539838f8a8d14c29aa1f00b5498274fbb5c959123bf"},"schema_version":"1.0"},"canonical_sha256":"7bb5f65adeb329954c692e179e734316f957bf3b0a627312832a327a62a7c821","source":{"kind":"arxiv","id":"2209.02784","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2209.02784","created_at":"2026-07-05T05:31:54Z"},{"alias_kind":"arxiv_version","alias_value":"2209.02784v2","created_at":"2026-07-05T05:31:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2209.02784","created_at":"2026-07-05T05:31:54Z"},{"alias_kind":"pith_short_12","alias_value":"PO27MWW6WMUZ","created_at":"2026-07-05T05:31:54Z"},{"alias_kind":"pith_short_16","alias_value":"PO27MWW6WMUZKTDJ","created_at":"2026-07-05T05:31:54Z"},{"alias_kind":"pith_short_8","alias_value":"PO27MWW6","created_at":"2026-07-05T05:31:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:PO27MWW6WMUZKTDJFYLZ442DC3","target":"record","payload":{"canonical_record":{"source":{"id":"2209.02784","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-09-06T19:06:25Z","cross_cats_sorted":["astro-ph.HE","astro-ph.SR"],"title_canon_sha256":"0c3202e34e6b5f029c348a315437c0b89d505bd7f1c58d35a182c1a180e11c26","abstract_canon_sha256":"3ba3ce24183e4c85a7ca1539838f8a8d14c29aa1f00b5498274fbb5c959123bf"},"schema_version":"1.0"},"canonical_sha256":"7bb5f65adeb329954c692e179e734316f957bf3b0a627312832a327a62a7c821","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:31:54.094843Z","signature_b64":"VEpt2CkS4HXnDwdDX97y2lnLxWfY52KpDgCpmCGXDagxTgDQxBS19ySsACchzCtK87/vfkVhM9ebVpEv5XyuBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7bb5f65adeb329954c692e179e734316f957bf3b0a627312832a327a62a7c821","last_reissued_at":"2026-07-05T05:31:54.094268Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:31:54.094268Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2209.02784","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":"2026-07-05T05:31:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7f7A8hBNebS89/DwUqh43HnDGVq8hkelkPJQ8NyOeKs3lZNZNABBFdOIXUXUF87mhg/k6AwjGuuzY2hEX+9KCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T10:03:46.180536Z"},"content_sha256":"9384812b13852afbe68b7db6a359dec99cd8afd23edcc82258b142b11a0009e2","schema_version":"1.0","event_id":"sha256:9384812b13852afbe68b7db6a359dec99cd8afd23edcc82258b142b11a0009e2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:PO27MWW6WMUZKTDJFYLZ442DC3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Classifying Astronomical Transients Using Only Host Galaxy Photometry","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.HE","astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Ann Zabludoff, Chia-Lin Ko, Kobus Barnard, Marina Kisley, Yu-Jing Qin","submitted_at":"2022-09-06T19:06:25Z","abstract_excerpt":"The Legacy Survey of Space and Time (LSST) at the Vera C. Rubin Observatory will discover tens of thousands of extragalactic transients each night. The high volume of alerts demands immediate classification of transient types in order to prioritize observational follow-ups before events fade away. We use host galaxy features to classify transients, thereby providing classification upon discovery. In contrast to past work that focused on distinguishing Type Ia and core-collapse supernovae (SNe) using host galaxy features that are not always accessible (e.g., morphology), we determine the relati"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2209.02784","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2209.02784/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T05:31:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2FJ41KqIpGI0vMKrfoLKdS0gqW+xhmlyrOHRfSG77Edu7IdS0KBXuRZ+3N2EMt9I30tA43CiKuaFz390Rsv5Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T10:03:46.180905Z"},"content_sha256":"de794541d15f8d01a2e31b88f6300fb8ee75350ad0862a27992d55be2b41cbe7","schema_version":"1.0","event_id":"sha256:de794541d15f8d01a2e31b88f6300fb8ee75350ad0862a27992d55be2b41cbe7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PO27MWW6WMUZKTDJFYLZ442DC3/bundle.json","state_url":"https://pith.science/pith/PO27MWW6WMUZKTDJFYLZ442DC3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PO27MWW6WMUZKTDJFYLZ442DC3/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":"2026-08-01T10:03:46Z","links":{"resolver":"https://pith.science/pith/PO27MWW6WMUZKTDJFYLZ442DC3","bundle":"https://pith.science/pith/PO27MWW6WMUZKTDJFYLZ442DC3/bundle.json","state":"https://pith.science/pith/PO27MWW6WMUZKTDJFYLZ442DC3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PO27MWW6WMUZKTDJFYLZ442DC3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:PO27MWW6WMUZKTDJFYLZ442DC3","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":"3ba3ce24183e4c85a7ca1539838f8a8d14c29aa1f00b5498274fbb5c959123bf","cross_cats_sorted":["astro-ph.HE","astro-ph.SR"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-09-06T19:06:25Z","title_canon_sha256":"0c3202e34e6b5f029c348a315437c0b89d505bd7f1c58d35a182c1a180e11c26"},"schema_version":"1.0","source":{"id":"2209.02784","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2209.02784","created_at":"2026-07-05T05:31:54Z"},{"alias_kind":"arxiv_version","alias_value":"2209.02784v2","created_at":"2026-07-05T05:31:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2209.02784","created_at":"2026-07-05T05:31:54Z"},{"alias_kind":"pith_short_12","alias_value":"PO27MWW6WMUZ","created_at":"2026-07-05T05:31:54Z"},{"alias_kind":"pith_short_16","alias_value":"PO27MWW6WMUZKTDJ","created_at":"2026-07-05T05:31:54Z"},{"alias_kind":"pith_short_8","alias_value":"PO27MWW6","created_at":"2026-07-05T05:31:54Z"}],"graph_snapshots":[{"event_id":"sha256:de794541d15f8d01a2e31b88f6300fb8ee75350ad0862a27992d55be2b41cbe7","target":"graph","created_at":"2026-07-05T05:31:54Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2209.02784/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Legacy Survey of Space and Time (LSST) at the Vera C. Rubin Observatory will discover tens of thousands of extragalactic transients each night. The high volume of alerts demands immediate classification of transient types in order to prioritize observational follow-ups before events fade away. We use host galaxy features to classify transients, thereby providing classification upon discovery. In contrast to past work that focused on distinguishing Type Ia and core-collapse supernovae (SNe) using host galaxy features that are not always accessible (e.g., morphology), we determine the relati","authors_text":"Ann Zabludoff, Chia-Lin Ko, Kobus Barnard, Marina Kisley, Yu-Jing Qin","cross_cats":["astro-ph.HE","astro-ph.SR"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-09-06T19:06:25Z","title":"Classifying Astronomical Transients Using Only Host Galaxy Photometry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2209.02784","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":"sha256:9384812b13852afbe68b7db6a359dec99cd8afd23edcc82258b142b11a0009e2","target":"record","created_at":"2026-07-05T05:31:54Z","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":"3ba3ce24183e4c85a7ca1539838f8a8d14c29aa1f00b5498274fbb5c959123bf","cross_cats_sorted":["astro-ph.HE","astro-ph.SR"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-09-06T19:06:25Z","title_canon_sha256":"0c3202e34e6b5f029c348a315437c0b89d505bd7f1c58d35a182c1a180e11c26"},"schema_version":"1.0","source":{"id":"2209.02784","kind":"arxiv","version":2}},"canonical_sha256":"7bb5f65adeb329954c692e179e734316f957bf3b0a627312832a327a62a7c821","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7bb5f65adeb329954c692e179e734316f957bf3b0a627312832a327a62a7c821","first_computed_at":"2026-07-05T05:31:54.094268Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:31:54.094268Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VEpt2CkS4HXnDwdDX97y2lnLxWfY52KpDgCpmCGXDagxTgDQxBS19ySsACchzCtK87/vfkVhM9ebVpEv5XyuBg==","signature_status":"signed_v1","signed_at":"2026-07-05T05:31:54.094843Z","signed_message":"canonical_sha256_bytes"},"source_id":"2209.02784","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9384812b13852afbe68b7db6a359dec99cd8afd23edcc82258b142b11a0009e2","sha256:de794541d15f8d01a2e31b88f6300fb8ee75350ad0862a27992d55be2b41cbe7"],"state_sha256":"ae05678347a7d49b86b1d258f8095d3014ebaca07af9314365f395858b9caae1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wTyX/H/wvCA5HeAVyODDmYC+BL1Tz9MItxSEj1Qacdx39t1xZ4iG1fidYW+0zpTEeGRl4fC8DYmidAjYjTr0DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-01T10:03:46.184108Z","bundle_sha256":"3b2abd198726fdf655cc27e7ef336447694afbfc2e9e685f26b761ecb30e9d30"}}