{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:X5QSZLNUHOPW6NA7XZNBHBKTI3","short_pith_number":"pith:X5QSZLNU","canonical_record":{"source":{"id":"2407.21733","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-07-31T16:42:14Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"a6f17c6677cf8027079c981ebb4f114b5ad8d7ecf3b5a177eea83ca6773e6e23","abstract_canon_sha256":"b0f2fa20a2b72daad6c06c6e3a972f20b4834a37e244866f70fb7c45ad78fbe9"},"schema_version":"1.0"},"canonical_sha256":"bf612cadb43b9f6f341fbe5a13855346d10c7773b9138a8987c51a5a89d129b6","source":{"kind":"arxiv","id":"2407.21733","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2407.21733","created_at":"2026-07-05T10:28:20Z"},{"alias_kind":"arxiv_version","alias_value":"2407.21733v1","created_at":"2026-07-05T10:28:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2407.21733","created_at":"2026-07-05T10:28:20Z"},{"alias_kind":"pith_short_12","alias_value":"X5QSZLNUHOPW","created_at":"2026-07-05T10:28:20Z"},{"alias_kind":"pith_short_16","alias_value":"X5QSZLNUHOPW6NA7","created_at":"2026-07-05T10:28:20Z"},{"alias_kind":"pith_short_8","alias_value":"X5QSZLNU","created_at":"2026-07-05T10:28:20Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:X5QSZLNUHOPW6NA7XZNBHBKTI3","target":"record","payload":{"canonical_record":{"source":{"id":"2407.21733","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-07-31T16:42:14Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"a6f17c6677cf8027079c981ebb4f114b5ad8d7ecf3b5a177eea83ca6773e6e23","abstract_canon_sha256":"b0f2fa20a2b72daad6c06c6e3a972f20b4834a37e244866f70fb7c45ad78fbe9"},"schema_version":"1.0"},"canonical_sha256":"bf612cadb43b9f6f341fbe5a13855346d10c7773b9138a8987c51a5a89d129b6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:28:20.281763Z","signature_b64":"80O+IF13b+KWx4VqLA3j0lmkr3LsxKVWST4C0IcGmiw5QmboeSLAXO71qKE5YdnyqtijwxdcrMSrKdA+2mNWBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bf612cadb43b9f6f341fbe5a13855346d10c7773b9138a8987c51a5a89d129b6","last_reissued_at":"2026-07-05T10:28:20.280716Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:28:20.280716Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2407.21733","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":"2026-07-05T10:28:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"e+tfnVbKAKu8VUY5GLZLI6SsJF+OXsPKifYSbkVn5Je15z4O+Xgjff7XwJGE+3egEE93NO4ab2oV+KBeHBL1CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T10:40:07.768619Z"},"content_sha256":"eb8c760180488a4cfe04385e0f89839afcf2b1569e596f7cb9323e68f0908e58","schema_version":"1.0","event_id":"sha256:eb8c760180488a4cfe04385e0f89839afcf2b1569e596f7cb9323e68f0908e58"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:X5QSZLNUHOPW6NA7XZNBHBKTI3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A study in scarlet -- II. Spectroscopic properties of a sample of Intermediate Luminosity Red Transients","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"A. Fiore, A. Gangopadhyay, A. Pastorello, A. Rau, A. Reguitti, C. Barbarino, C. Inserra, C. McCully, C. Pellegrino, D. A. Howell, D. Eappachen, D. E. Reichart, D. Hiramatsu, D. J. Sand, D. R. Young, E. Callis, E. Cappellaro, E. Kankare, E. Karamehmetoglu, E. Mason, E. Padilla Gonzalez, E. Paraskeva, E. Y. Hsiao, F. Bufano, G. Leloudas, G. Pignata, G. Valerin, H. Kuncarayakti, I. Salmaso, J. E. Andrews, J. Jencson, J. P. Anderson, J. Sollerman, K. Misra, L. Galbany, L. Izzo, L. Tartaglia, L. Tomasella, M. Della Valle, M. D. Fulton, M. D. Stritzinger, M. Fraser, M. Gromadzki, M. Limongi, M. Lundquist, M. Nicholl, M. Shahbandeh, M. Singh, M. Turatto, N. Elias-Rosa, P. A. Mazzali, P. Lundqvist, P. Ochner, R. C. Amaro, R. Dastidar, R. Kotak, R. Roy, S. Benetti, S. Brennan, S. J. Prentice, S. J. Smartt, S. Valenti, S. Wyatt, T. E. M\\\"uller-Bravo, T. Heikkil\\\"a, T. M. Reynolds, T.-W. Chen, Y.-Z. Cai","submitted_at":"2024-07-31T16:42:14Z","abstract_excerpt":"We investigate the spectroscopic characteristics of Intermediate Luminosity Red Transients (ILRTs), a class of elusive objects with peak luminosity between that of classical novae and standard supernovae. We present the extensive optical and near-infrared (NIR) spectroscopic monitoring of four ILRTs, namely NGC 300 2008OT-1, AT 2019abn, AT 2019ahd and AT 2019udc. First we focus on the evolution of the most prominent spectral features observed in the low resolution spectra, then we discuss more in detail the high resolution spectrum collected for NGC 300 2008OT-1 with the Very Large Telescope e"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.21733","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/2407.21733/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":"2026-07-05T10:28:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Vk/nA2p4/44NmtDWg7YfCHvlu72hkOmhtxxQnk56BB0U1OJQVhFaI2CDQ0kFT9TyHu04LALtVmKQ0kgIgRA8Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T10:40:07.769228Z"},"content_sha256":"cf87862c827056e576fb71fdbac717bf3f423bc212559ca85720b2da3ccd290d","schema_version":"1.0","event_id":"sha256:cf87862c827056e576fb71fdbac717bf3f423bc212559ca85720b2da3ccd290d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/X5QSZLNUHOPW6NA7XZNBHBKTI3/bundle.json","state_url":"https://pith.science/pith/X5QSZLNUHOPW6NA7XZNBHBKTI3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/X5QSZLNUHOPW6NA7XZNBHBKTI3/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":"2026-08-14T10:40:07Z","links":{"resolver":"https://pith.science/pith/X5QSZLNUHOPW6NA7XZNBHBKTI3","bundle":"https://pith.science/pith/X5QSZLNUHOPW6NA7XZNBHBKTI3/bundle.json","state":"https://pith.science/pith/X5QSZLNUHOPW6NA7XZNBHBKTI3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/X5QSZLNUHOPW6NA7XZNBHBKTI3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:X5QSZLNUHOPW6NA7XZNBHBKTI3","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":"b0f2fa20a2b72daad6c06c6e3a972f20b4834a37e244866f70fb7c45ad78fbe9","cross_cats_sorted":["astro-ph.HE"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-07-31T16:42:14Z","title_canon_sha256":"a6f17c6677cf8027079c981ebb4f114b5ad8d7ecf3b5a177eea83ca6773e6e23"},"schema_version":"1.0","source":{"id":"2407.21733","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2407.21733","created_at":"2026-07-05T10:28:20Z"},{"alias_kind":"arxiv_version","alias_value":"2407.21733v1","created_at":"2026-07-05T10:28:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2407.21733","created_at":"2026-07-05T10:28:20Z"},{"alias_kind":"pith_short_12","alias_value":"X5QSZLNUHOPW","created_at":"2026-07-05T10:28:20Z"},{"alias_kind":"pith_short_16","alias_value":"X5QSZLNUHOPW6NA7","created_at":"2026-07-05T10:28:20Z"},{"alias_kind":"pith_short_8","alias_value":"X5QSZLNU","created_at":"2026-07-05T10:28:20Z"}],"graph_snapshots":[{"event_id":"sha256:cf87862c827056e576fb71fdbac717bf3f423bc212559ca85720b2da3ccd290d","target":"graph","created_at":"2026-07-05T10:28:20Z","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/2407.21733/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We investigate the spectroscopic characteristics of Intermediate Luminosity Red Transients (ILRTs), a class of elusive objects with peak luminosity between that of classical novae and standard supernovae. We present the extensive optical and near-infrared (NIR) spectroscopic monitoring of four ILRTs, namely NGC 300 2008OT-1, AT 2019abn, AT 2019ahd and AT 2019udc. First we focus on the evolution of the most prominent spectral features observed in the low resolution spectra, then we discuss more in detail the high resolution spectrum collected for NGC 300 2008OT-1 with the Very Large Telescope e","authors_text":"A. Fiore, A. Gangopadhyay, A. Pastorello, A. Rau, A. Reguitti, C. Barbarino, C. Inserra, C. McCully, C. Pellegrino, D. A. Howell, D. Eappachen, D. E. Reichart, D. Hiramatsu, D. J. Sand, D. R. Young, E. Callis, E. Cappellaro, E. Kankare, E. Karamehmetoglu, E. Mason, E. Padilla Gonzalez, E. Paraskeva, E. Y. Hsiao, F. Bufano, G. Leloudas, G. Pignata, G. Valerin, H. Kuncarayakti, I. Salmaso, J. E. Andrews, J. Jencson, J. P. Anderson, J. Sollerman, K. Misra, L. Galbany, L. Izzo, L. Tartaglia, L. Tomasella, M. Della Valle, M. D. Fulton, M. D. Stritzinger, M. Fraser, M. Gromadzki, M. Limongi, M. Lundquist, M. Nicholl, M. Shahbandeh, M. Singh, M. Turatto, N. Elias-Rosa, P. A. Mazzali, P. Lundqvist, P. Ochner, R. C. Amaro, R. Dastidar, R. Kotak, R. Roy, S. Benetti, S. Brennan, S. J. Prentice, S. J. Smartt, S. Valenti, S. Wyatt, T. E. M\\\"uller-Bravo, T. Heikkil\\\"a, T. M. Reynolds, T.-W. Chen, Y.-Z. Cai","cross_cats":["astro-ph.HE"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-07-31T16:42:14Z","title":"A study in scarlet -- II. Spectroscopic properties of a sample of Intermediate Luminosity Red Transients"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.21733","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:eb8c760180488a4cfe04385e0f89839afcf2b1569e596f7cb9323e68f0908e58","target":"record","created_at":"2026-07-05T10:28:20Z","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":"b0f2fa20a2b72daad6c06c6e3a972f20b4834a37e244866f70fb7c45ad78fbe9","cross_cats_sorted":["astro-ph.HE"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-07-31T16:42:14Z","title_canon_sha256":"a6f17c6677cf8027079c981ebb4f114b5ad8d7ecf3b5a177eea83ca6773e6e23"},"schema_version":"1.0","source":{"id":"2407.21733","kind":"arxiv","version":1}},"canonical_sha256":"bf612cadb43b9f6f341fbe5a13855346d10c7773b9138a8987c51a5a89d129b6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bf612cadb43b9f6f341fbe5a13855346d10c7773b9138a8987c51a5a89d129b6","first_computed_at":"2026-07-05T10:28:20.280716Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:28:20.280716Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"80O+IF13b+KWx4VqLA3j0lmkr3LsxKVWST4C0IcGmiw5QmboeSLAXO71qKE5YdnyqtijwxdcrMSrKdA+2mNWBg==","signature_status":"signed_v1","signed_at":"2026-07-05T10:28:20.281763Z","signed_message":"canonical_sha256_bytes"},"source_id":"2407.21733","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eb8c760180488a4cfe04385e0f89839afcf2b1569e596f7cb9323e68f0908e58","sha256:cf87862c827056e576fb71fdbac717bf3f423bc212559ca85720b2da3ccd290d"],"state_sha256":"0dc7f21b60a895fdf468d3104dc1c573dc6a76510219e1cf83de5fbc043bc706"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FuG8FnPWqOMvUIQ/mPZAHELkmWhVc7s8Dj/WL5vG0XRvTkLpwyDpdl0BvPjB1SgFqJz63V+GMQkKgwMqVpzDCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T10:40:07.773108Z","bundle_sha256":"a3e921f17ad1657d7d6aed6c0ae680258aeb4210054343744d29fb571ccea970"}}