{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:2SAYEU2ECJ27MHMQYQSSX3VEQK","short_pith_number":"pith:2SAYEU2E","schema_version":"1.0","canonical_sha256":"d4818253441275f61d90c4252beea4828e633caf35c744e791c4a6ae9f43bb29","source":{"kind":"arxiv","id":"1811.02620","version":2},"attestation_state":"computed","paper":{"title":"Optical properties of amorphous carbon dust around C-stars: new constraints from 2MASS and Gaia observations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Ambra Nanni","submitted_at":"2018-11-06T20:32:42Z","abstract_excerpt":"In this work the optical properties of amorphous carbon (amC) dust condensed around carbon(C)-stars are constrained by comparing the observations for the Large Magellanic Cloud C-stars from the Two Micron All Sky Survey (2MASS) and from the Gaia data release 2 (DR2) with the synthetic photometry obtained by computing dust growth and radiative transfer in their circumstellar envelopes. The set of optical constants of amC dust considered have been pre-selected according to their ability to reproduce the infrared colour-colour diagrams in the Small Magellanic Cloud. Only two combinations of the o"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1811.02620","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-11-06T20:32:42Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"d52fbded85fd2625f3e7184f38e1676553f0077c4a1aa6b7ed2c65668417d212","abstract_canon_sha256":"c6267e98a5ddf649c76ba76a08bb507d7a6619b0483d6f666ad92f0eb5b90bc6"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:59:48.608365Z","signature_b64":"79Q107T39kSpQ8rY+KUztrd8JPleCAiqp3gkQxeBaSLVqnaGNaWcPxcdKWug7s0+Tlp/+ECAkmAkLKtvEu7CDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d4818253441275f61d90c4252beea4828e633caf35c744e791c4a6ae9f43bb29","last_reissued_at":"2026-05-17T23:59:48.607893Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:59:48.607893Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Optical properties of amorphous carbon dust around C-stars: new constraints from 2MASS and Gaia observations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Ambra Nanni","submitted_at":"2018-11-06T20:32:42Z","abstract_excerpt":"In this work the optical properties of amorphous carbon (amC) dust condensed around carbon(C)-stars are constrained by comparing the observations for the Large Magellanic Cloud C-stars from the Two Micron All Sky Survey (2MASS) and from the Gaia data release 2 (DR2) with the synthetic photometry obtained by computing dust growth and radiative transfer in their circumstellar envelopes. The set of optical constants of amC dust considered have been pre-selected according to their ability to reproduce the infrared colour-colour diagrams in the Small Magellanic Cloud. Only two combinations of the o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.02620","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1811.02620","created_at":"2026-05-17T23:59:48.607965+00:00"},{"alias_kind":"arxiv_version","alias_value":"1811.02620v2","created_at":"2026-05-17T23:59:48.607965+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.02620","created_at":"2026-05-17T23:59:48.607965+00:00"},{"alias_kind":"pith_short_12","alias_value":"2SAYEU2ECJ27","created_at":"2026-05-18T12:32:02.567920+00:00"},{"alias_kind":"pith_short_16","alias_value":"2SAYEU2ECJ27MHMQ","created_at":"2026-05-18T12:32:02.567920+00:00"},{"alias_kind":"pith_short_8","alias_value":"2SAYEU2E","created_at":"2026-05-18T12:32:02.567920+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/2SAYEU2ECJ27MHMQYQSSX3VEQK","json":"https://pith.science/pith/2SAYEU2ECJ27MHMQYQSSX3VEQK.json","graph_json":"https://pith.science/api/pith-number/2SAYEU2ECJ27MHMQYQSSX3VEQK/graph.json","events_json":"https://pith.science/api/pith-number/2SAYEU2ECJ27MHMQYQSSX3VEQK/events.json","paper":"https://pith.science/paper/2SAYEU2E"},"agent_actions":{"view_html":"https://pith.science/pith/2SAYEU2ECJ27MHMQYQSSX3VEQK","download_json":"https://pith.science/pith/2SAYEU2ECJ27MHMQYQSSX3VEQK.json","view_paper":"https://pith.science/paper/2SAYEU2E","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1811.02620&json=true","fetch_graph":"https://pith.science/api/pith-number/2SAYEU2ECJ27MHMQYQSSX3VEQK/graph.json","fetch_events":"https://pith.science/api/pith-number/2SAYEU2ECJ27MHMQYQSSX3VEQK/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/2SAYEU2ECJ27MHMQYQSSX3VEQK/action/timestamp_anchor","attest_storage":"https://pith.science/pith/2SAYEU2ECJ27MHMQYQSSX3VEQK/action/storage_attestation","attest_author":"https://pith.science/pith/2SAYEU2ECJ27MHMQYQSSX3VEQK/action/author_attestation","sign_citation":"https://pith.science/pith/2SAYEU2ECJ27MHMQYQSSX3VEQK/action/citation_signature","submit_replication":"https://pith.science/pith/2SAYEU2ECJ27MHMQYQSSX3VEQK/action/replication_record"}},"created_at":"2026-05-17T23:59:48.607965+00:00","updated_at":"2026-05-17T23:59:48.607965+00:00"}