{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:QE4FHWW7MTQS4OB5Y4UBUMJ755","short_pith_number":"pith:QE4FHWW7","canonical_record":{"source":{"id":"2506.11637","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-06-13T10:07:31Z","cross_cats_sorted":[],"title_canon_sha256":"1f1a5893754265ae4a748f2a3639dd80163b692ba93f357c6fe42e7131571f09","abstract_canon_sha256":"6683c300086308d95d99dda8a5c4286abccb633081d5300686388fabe2b6b0fd"},"schema_version":"1.0"},"canonical_sha256":"813853dadf64e12e383dc7281a313fef546758526f39b75e3906c062647b8270","source":{"kind":"arxiv","id":"2506.11637","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.11637","created_at":"2026-07-05T11:21:08Z"},{"alias_kind":"arxiv_version","alias_value":"2506.11637v1","created_at":"2026-07-05T11:21:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.11637","created_at":"2026-07-05T11:21:08Z"},{"alias_kind":"pith_short_12","alias_value":"QE4FHWW7MTQS","created_at":"2026-07-05T11:21:08Z"},{"alias_kind":"pith_short_16","alias_value":"QE4FHWW7MTQS4OB5","created_at":"2026-07-05T11:21:08Z"},{"alias_kind":"pith_short_8","alias_value":"QE4FHWW7","created_at":"2026-07-05T11:21:08Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:QE4FHWW7MTQS4OB5Y4UBUMJ755","target":"record","payload":{"canonical_record":{"source":{"id":"2506.11637","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-06-13T10:07:31Z","cross_cats_sorted":[],"title_canon_sha256":"1f1a5893754265ae4a748f2a3639dd80163b692ba93f357c6fe42e7131571f09","abstract_canon_sha256":"6683c300086308d95d99dda8a5c4286abccb633081d5300686388fabe2b6b0fd"},"schema_version":"1.0"},"canonical_sha256":"813853dadf64e12e383dc7281a313fef546758526f39b75e3906c062647b8270","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:21:08.044141Z","signature_b64":"8t5A8/ofqrM0Wc6dOZwGR4tsIKajlogENP/P8z0pUUgKpKyk/vPqEMY+VCN2yDGiwgIMdMWD///1U7ayJpTfCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"813853dadf64e12e383dc7281a313fef546758526f39b75e3906c062647b8270","last_reissued_at":"2026-07-05T11:21:08.043690Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:21:08.043690Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2506.11637","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":"2026-07-05T11:21:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wFac8hrYtuuo2Yz31cIsn4kgDBdhTI6wytJkumiUSCVGmezmqk0Tmvt+FcAA+Q075QKWfg6HhJJLD0/agNi1BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T15:19:11.280799Z"},"content_sha256":"65ad5fbe53a5f82b127af5a257f5afd72398b1e697790348c3dc5e272259a8c6","schema_version":"1.0","event_id":"sha256:65ad5fbe53a5f82b127af5a257f5afd72398b1e697790348c3dc5e272259a8c6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:QE4FHWW7MTQS4OB5Y4UBUMJ755","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Multivariate Time-series Transformer Embeddings for Light Curves","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Gabriel Chiong, Ignacio Becker, Pavlos Protopapas","submitted_at":"2025-06-13T10:07:31Z","abstract_excerpt":"Astronomical surveys produce time-series data by observing stellar objects across multiple wavelength bands. Foundational transformer-based models, such as Astromer, encode each time-series as a sequence of embeddings of uniform dimensions. However, such models operate independently on each band at a single time and do not natively leverage information across telescope filters. We extend this framework by introducing a fusion mechanism that maps the collection of single-band embeddings to a unified sequence representation, enabling multiband modeling for downstream tasks. The challenge lies in"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.11637","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2506.11637/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":"2026-07-05T11:21:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/K1H36WjPj/VvBIcXCax1S/UT+RfOLu3T+YUbNKGwD81h3j0HuA4OYTcjUbQmfHbAzDa9izoy+aGzBBYFEZXBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T15:19:11.281869Z"},"content_sha256":"71c53454c03835e91d80b1627f032908e7b9ec5942fdebe8b967a6cb089848ef","schema_version":"1.0","event_id":"sha256:71c53454c03835e91d80b1627f032908e7b9ec5942fdebe8b967a6cb089848ef"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QE4FHWW7MTQS4OB5Y4UBUMJ755/bundle.json","state_url":"https://pith.science/pith/QE4FHWW7MTQS4OB5Y4UBUMJ755/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QE4FHWW7MTQS4OB5Y4UBUMJ755/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":"2026-08-05T15:19:11Z","links":{"resolver":"https://pith.science/pith/QE4FHWW7MTQS4OB5Y4UBUMJ755","bundle":"https://pith.science/pith/QE4FHWW7MTQS4OB5Y4UBUMJ755/bundle.json","state":"https://pith.science/pith/QE4FHWW7MTQS4OB5Y4UBUMJ755/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QE4FHWW7MTQS4OB5Y4UBUMJ755/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:QE4FHWW7MTQS4OB5Y4UBUMJ755","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":"6683c300086308d95d99dda8a5c4286abccb633081d5300686388fabe2b6b0fd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-06-13T10:07:31Z","title_canon_sha256":"1f1a5893754265ae4a748f2a3639dd80163b692ba93f357c6fe42e7131571f09"},"schema_version":"1.0","source":{"id":"2506.11637","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.11637","created_at":"2026-07-05T11:21:08Z"},{"alias_kind":"arxiv_version","alias_value":"2506.11637v1","created_at":"2026-07-05T11:21:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.11637","created_at":"2026-07-05T11:21:08Z"},{"alias_kind":"pith_short_12","alias_value":"QE4FHWW7MTQS","created_at":"2026-07-05T11:21:08Z"},{"alias_kind":"pith_short_16","alias_value":"QE4FHWW7MTQS4OB5","created_at":"2026-07-05T11:21:08Z"},{"alias_kind":"pith_short_8","alias_value":"QE4FHWW7","created_at":"2026-07-05T11:21:08Z"}],"graph_snapshots":[{"event_id":"sha256:71c53454c03835e91d80b1627f032908e7b9ec5942fdebe8b967a6cb089848ef","target":"graph","created_at":"2026-07-05T11:21:08Z","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/2506.11637/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Astronomical surveys produce time-series data by observing stellar objects across multiple wavelength bands. Foundational transformer-based models, such as Astromer, encode each time-series as a sequence of embeddings of uniform dimensions. However, such models operate independently on each band at a single time and do not natively leverage information across telescope filters. We extend this framework by introducing a fusion mechanism that maps the collection of single-band embeddings to a unified sequence representation, enabling multiband modeling for downstream tasks. The challenge lies in","authors_text":"Gabriel Chiong, Ignacio Becker, Pavlos Protopapas","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-06-13T10:07:31Z","title":"Multivariate Time-series Transformer Embeddings for Light Curves"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.11637","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":"sha256:65ad5fbe53a5f82b127af5a257f5afd72398b1e697790348c3dc5e272259a8c6","target":"record","created_at":"2026-07-05T11:21:08Z","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":"6683c300086308d95d99dda8a5c4286abccb633081d5300686388fabe2b6b0fd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-06-13T10:07:31Z","title_canon_sha256":"1f1a5893754265ae4a748f2a3639dd80163b692ba93f357c6fe42e7131571f09"},"schema_version":"1.0","source":{"id":"2506.11637","kind":"arxiv","version":1}},"canonical_sha256":"813853dadf64e12e383dc7281a313fef546758526f39b75e3906c062647b8270","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"813853dadf64e12e383dc7281a313fef546758526f39b75e3906c062647b8270","first_computed_at":"2026-07-05T11:21:08.043690Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:21:08.043690Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8t5A8/ofqrM0Wc6dOZwGR4tsIKajlogENP/P8z0pUUgKpKyk/vPqEMY+VCN2yDGiwgIMdMWD///1U7ayJpTfCg==","signature_status":"signed_v1","signed_at":"2026-07-05T11:21:08.044141Z","signed_message":"canonical_sha256_bytes"},"source_id":"2506.11637","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:65ad5fbe53a5f82b127af5a257f5afd72398b1e697790348c3dc5e272259a8c6","sha256:71c53454c03835e91d80b1627f032908e7b9ec5942fdebe8b967a6cb089848ef"],"state_sha256":"8601fbb07190d032ad3d2d23c4905c632c69696330372812856f2c1af264d1ee"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4PXG3gFK1PiZ0nnwnB92YFQMcYIp8FcxR4mQLpMHyCNGR1/pj59oUaIpeUtof3aFJFvMuWW0+4uh9M9oGj2iBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T15:19:11.349195Z","bundle_sha256":"7b2462d9740c6797c7592fea3c7b1bfa001202a7d050672b178416b87a86e71b"}}