{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:C4GNNBUZU6T27MYBZPM2IJMXDX","short_pith_number":"pith:C4GNNBUZ","canonical_record":{"source":{"id":"2306.15703","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2023-06-27T02:07:50Z","cross_cats_sorted":["astro-ph.GA","astro-ph.SR"],"title_canon_sha256":"46699b3ad2e7a2b4ed40626a7ef0a786a052ab5ef784f87d55a428baaf3fe4a2","abstract_canon_sha256":"49aa467f339d9eede561577739631b9275f2b7c8bb5174493033e99e625854db"},"schema_version":"1.0"},"canonical_sha256":"170cd68699a7a7afb301cbd9a425971dee618c0b197f8b1f3b1f72c8487571a0","source":{"kind":"arxiv","id":"2306.15703","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2306.15703","created_at":"2026-07-05T06:25:43Z"},{"alias_kind":"arxiv_version","alias_value":"2306.15703v1","created_at":"2026-07-05T06:25:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2306.15703","created_at":"2026-07-05T06:25:43Z"},{"alias_kind":"pith_short_12","alias_value":"C4GNNBUZU6T2","created_at":"2026-07-05T06:25:43Z"},{"alias_kind":"pith_short_16","alias_value":"C4GNNBUZU6T27MYB","created_at":"2026-07-05T06:25:43Z"},{"alias_kind":"pith_short_8","alias_value":"C4GNNBUZ","created_at":"2026-07-05T06:25:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:C4GNNBUZU6T27MYBZPM2IJMXDX","target":"record","payload":{"canonical_record":{"source":{"id":"2306.15703","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2023-06-27T02:07:50Z","cross_cats_sorted":["astro-ph.GA","astro-ph.SR"],"title_canon_sha256":"46699b3ad2e7a2b4ed40626a7ef0a786a052ab5ef784f87d55a428baaf3fe4a2","abstract_canon_sha256":"49aa467f339d9eede561577739631b9275f2b7c8bb5174493033e99e625854db"},"schema_version":"1.0"},"canonical_sha256":"170cd68699a7a7afb301cbd9a425971dee618c0b197f8b1f3b1f72c8487571a0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:25:43.416864Z","signature_b64":"akK3dxvtkEE7aoIXEdJe35MjiJPfBKRRIPXNkBKmtUZOeW5uuIPmoEHo1Cpnx7KxuPVp798CKo0uDmV9crBCAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"170cd68699a7a7afb301cbd9a425971dee618c0b197f8b1f3b1f72c8487571a0","last_reissued_at":"2026-07-05T06:25:43.416447Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:25:43.416447Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2306.15703","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":"2026-07-05T06:25:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Jz2uZOBFopO4TSVggR/3GXD1VwhLkieIeohdemo9MwvNmMX2/zGFpvBDSUfmdo7IGx2kumIWA+6IPCnk2TxaAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T07:44:45.537862Z"},"content_sha256":"56826d18331a28c2910d1d1678b5b3176530a36794da10eb5662e63462617b08","schema_version":"1.0","event_id":"sha256:56826d18331a28c2910d1d1678b5b3176530a36794da10eb5662e63462617b08"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:C4GNNBUZU6T27MYBZPM2IJMXDX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Toward a Spectral Foundation Model: An Attention-Based Approach with Domain-Inspired Fine-Tuning and Wavelength Parameterization","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA","astro-ph.SR"],"primary_cat":"astro-ph.IM","authors_text":"Maja Jab{\\l}o\\'nska, Tomasz R\\'o\\.za\\'nski, Yuan-Sen Ting","submitted_at":"2023-06-27T02:07:50Z","abstract_excerpt":"Astrophysical explorations are underpinned by large-scale stellar spectroscopy surveys, necessitating a paradigm shift in spectral fitting techniques. Our study proposes three enhancements to transcend the limitations of the current spectral emulation models. We implement an attention-based emulator, adept at unveiling long-range information between wavelength pixels. We leverage a domain-specific fine-tuning strategy where the model is pre-trained on spectra with fixed stellar parameters and variable elemental abundances, followed by fine-tuning on the entire domain. Moreover, by treating wav"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2306.15703","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/2306.15703/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":"2026-07-05T06:25:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hz9XFqOfciMQN3HtylTHxDhpPgkWv9qNrWwAfMRj4RiVxUui4BAR5YkxkYfl9FbXB/LskRp3WfS/7T7jrQSpBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T07:44:45.538203Z"},"content_sha256":"ca459a41b19401aef2c56bf08ac3e1fb766413d5ee389b1b4ca0609333e27726","schema_version":"1.0","event_id":"sha256:ca459a41b19401aef2c56bf08ac3e1fb766413d5ee389b1b4ca0609333e27726"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/C4GNNBUZU6T27MYBZPM2IJMXDX/bundle.json","state_url":"https://pith.science/pith/C4GNNBUZU6T27MYBZPM2IJMXDX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/C4GNNBUZU6T27MYBZPM2IJMXDX/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":"2026-08-14T07:44:45Z","links":{"resolver":"https://pith.science/pith/C4GNNBUZU6T27MYBZPM2IJMXDX","bundle":"https://pith.science/pith/C4GNNBUZU6T27MYBZPM2IJMXDX/bundle.json","state":"https://pith.science/pith/C4GNNBUZU6T27MYBZPM2IJMXDX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/C4GNNBUZU6T27MYBZPM2IJMXDX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:C4GNNBUZU6T27MYBZPM2IJMXDX","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":"49aa467f339d9eede561577739631b9275f2b7c8bb5174493033e99e625854db","cross_cats_sorted":["astro-ph.GA","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2023-06-27T02:07:50Z","title_canon_sha256":"46699b3ad2e7a2b4ed40626a7ef0a786a052ab5ef784f87d55a428baaf3fe4a2"},"schema_version":"1.0","source":{"id":"2306.15703","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2306.15703","created_at":"2026-07-05T06:25:43Z"},{"alias_kind":"arxiv_version","alias_value":"2306.15703v1","created_at":"2026-07-05T06:25:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2306.15703","created_at":"2026-07-05T06:25:43Z"},{"alias_kind":"pith_short_12","alias_value":"C4GNNBUZU6T2","created_at":"2026-07-05T06:25:43Z"},{"alias_kind":"pith_short_16","alias_value":"C4GNNBUZU6T27MYB","created_at":"2026-07-05T06:25:43Z"},{"alias_kind":"pith_short_8","alias_value":"C4GNNBUZ","created_at":"2026-07-05T06:25:43Z"}],"graph_snapshots":[{"event_id":"sha256:ca459a41b19401aef2c56bf08ac3e1fb766413d5ee389b1b4ca0609333e27726","target":"graph","created_at":"2026-07-05T06:25:43Z","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/2306.15703/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Astrophysical explorations are underpinned by large-scale stellar spectroscopy surveys, necessitating a paradigm shift in spectral fitting techniques. Our study proposes three enhancements to transcend the limitations of the current spectral emulation models. We implement an attention-based emulator, adept at unveiling long-range information between wavelength pixels. We leverage a domain-specific fine-tuning strategy where the model is pre-trained on spectra with fixed stellar parameters and variable elemental abundances, followed by fine-tuning on the entire domain. Moreover, by treating wav","authors_text":"Maja Jab{\\l}o\\'nska, Tomasz R\\'o\\.za\\'nski, Yuan-Sen Ting","cross_cats":["astro-ph.GA","astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2023-06-27T02:07:50Z","title":"Toward a Spectral Foundation Model: An Attention-Based Approach with Domain-Inspired Fine-Tuning and Wavelength Parameterization"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2306.15703","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":"sha256:56826d18331a28c2910d1d1678b5b3176530a36794da10eb5662e63462617b08","target":"record","created_at":"2026-07-05T06:25:43Z","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":"49aa467f339d9eede561577739631b9275f2b7c8bb5174493033e99e625854db","cross_cats_sorted":["astro-ph.GA","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2023-06-27T02:07:50Z","title_canon_sha256":"46699b3ad2e7a2b4ed40626a7ef0a786a052ab5ef784f87d55a428baaf3fe4a2"},"schema_version":"1.0","source":{"id":"2306.15703","kind":"arxiv","version":1}},"canonical_sha256":"170cd68699a7a7afb301cbd9a425971dee618c0b197f8b1f3b1f72c8487571a0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"170cd68699a7a7afb301cbd9a425971dee618c0b197f8b1f3b1f72c8487571a0","first_computed_at":"2026-07-05T06:25:43.416447Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:25:43.416447Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"akK3dxvtkEE7aoIXEdJe35MjiJPfBKRRIPXNkBKmtUZOeW5uuIPmoEHo1Cpnx7KxuPVp798CKo0uDmV9crBCAw==","signature_status":"signed_v1","signed_at":"2026-07-05T06:25:43.416864Z","signed_message":"canonical_sha256_bytes"},"source_id":"2306.15703","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:56826d18331a28c2910d1d1678b5b3176530a36794da10eb5662e63462617b08","sha256:ca459a41b19401aef2c56bf08ac3e1fb766413d5ee389b1b4ca0609333e27726"],"state_sha256":"4abdc68c1dadf6d32a780aad15d04d02efa7f7e91f02a920da7e0afc29973bf8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3JUJhQhd0Ke9t0ndX7gTpkmm9jsVlFww5PaQJpg876Zi8aOdPZWCrorSlgP7i0clcMc05xUApGHmpDzLnkWhDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T07:44:45.541394Z","bundle_sha256":"4ade52808c10850d7ed92c17c5da14fd080eeaa7f73725528c5c9aedc1dbf913"}}