{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:IOXP2ZCTNXIRZRKTXAK5N3OQVE","short_pith_number":"pith:IOXP2ZCT","canonical_record":{"source":{"id":"0803.2235","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-03-17T11:31:41Z","cross_cats_sorted":[],"title_canon_sha256":"bc9b38e5f1c2714d52931219f137ffba300d05a5f5fd748cfecb0ddccdefeccd","abstract_canon_sha256":"237ac1ba8899a1844bdc506a4cd5afd3b10fe6a0b7df62c4d7bda97a52fb75db"},"schema_version":"1.0"},"canonical_sha256":"43aefd64536dd11cc553b815d6edd0a93bc361535fd8919a72b3319045e6ccaa","source":{"kind":"arxiv","id":"0803.2235","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0803.2235","created_at":"2026-05-18T04:40:54Z"},{"alias_kind":"arxiv_version","alias_value":"0803.2235v3","created_at":"2026-05-18T04:40:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0803.2235","created_at":"2026-05-18T04:40:54Z"},{"alias_kind":"pith_short_12","alias_value":"IOXP2ZCTNXIR","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"IOXP2ZCTNXIRZRKT","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"IOXP2ZCT","created_at":"2026-05-18T12:25:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:IOXP2ZCTNXIRZRKTXAK5N3OQVE","target":"record","payload":{"canonical_record":{"source":{"id":"0803.2235","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-03-17T11:31:41Z","cross_cats_sorted":[],"title_canon_sha256":"bc9b38e5f1c2714d52931219f137ffba300d05a5f5fd748cfecb0ddccdefeccd","abstract_canon_sha256":"237ac1ba8899a1844bdc506a4cd5afd3b10fe6a0b7df62c4d7bda97a52fb75db"},"schema_version":"1.0"},"canonical_sha256":"43aefd64536dd11cc553b815d6edd0a93bc361535fd8919a72b3319045e6ccaa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:40:54.822218Z","signature_b64":"W9hoWW3Ok20gaC3VHvhIE61BA2dizG2PrhAiOhZILFkNCCP2Nypd3iyoJwXmi7c1xeYm/D06NiHHAOGlser/DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"43aefd64536dd11cc553b815d6edd0a93bc361535fd8919a72b3319045e6ccaa","last_reissued_at":"2026-05-18T04:40:54.821706Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:40:54.821706Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0803.2235","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:40:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xa7m1DBQHArLtk1605xSQpag7HqblOiXLGFvSiPXMNIAgrgfDJ5qlnOGla0l5jkmZhCVdTyt/hwqbpQgB+XxDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T08:15:16.146911Z"},"content_sha256":"6cd7dd7f8f3e654e0523f41d13178c9891add59e5f8ffe45f456571af02164fa","schema_version":"1.0","event_id":"sha256:6cd7dd7f8f3e654e0523f41d13178c9891add59e5f8ffe45f456571af02164fa"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:IOXP2ZCTNXIRZRKTXAK5N3OQVE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the distribution of stellar masses in gamma-ray burst host galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"2), 3), D. Malesani (1), D. Watson (1), J. Gorosabel (4), J. Hjorth (1), J. M. Castro Cer\\'on (1, J. P. U. Fynbo (1), M. J. Micha{\\l}owski (1, M. Morales Calder\\'on (5); ((1) Dark Cosmology Centre (NBI) Copenhagen; (2) Herschel Science Centre (ESA/ESAC) Madrid; (3) Institute for Astronomy (ROE) Edinburgh; (4) Instituto de Astrof\\'isica de Andaluc\\'ia (CSIC) Granada; (5) Spitzer Science Centre (Caltech) Pasadena)","submitted_at":"2008-03-17T11:31:41Z","abstract_excerpt":"We analyse Spitzer images of 30 long-duration gamma-ray burst (GRB) host galaxies. We estimate their total stellar masses (M*) based on the rest-frame K-band luminosities (L_Krest) and constrain their star formation rates (SFRs, not corrected for dust extinction) based on the rest-frame UV continua. Further, we compute a mean M*/L_Krest = 0.45 Msun/Lsun. We find that the hosts are low M*, star-forming systems. The median M* in our sample (<M*> = 10^9.7 Msun) is lower than that of \"field\" galaxies (e.g., Gemini Deep Deep Survey). The range spanned by M* is 10^7 Msun < M* < 10^11 Msun, while the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0803.2235","kind":"arxiv","version":3},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:40:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RyayFvLY2au3KH7D377+VYi/Eg0KJ1f8dA0ZJ23dhA2wfE/uw6GQWY51vyLYwHgASq4kl2kmIDbMrxycOaMOBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T08:15:16.147493Z"},"content_sha256":"ffb7000342acd4d205ac8c0d5dbc7bee5645878d1bf43344b536988fdcf5baed","schema_version":"1.0","event_id":"sha256:ffb7000342acd4d205ac8c0d5dbc7bee5645878d1bf43344b536988fdcf5baed"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IOXP2ZCTNXIRZRKTXAK5N3OQVE/bundle.json","state_url":"https://pith.science/pith/IOXP2ZCTNXIRZRKTXAK5N3OQVE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IOXP2ZCTNXIRZRKTXAK5N3OQVE/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":"2026-06-03T08:15:16Z","links":{"resolver":"https://pith.science/pith/IOXP2ZCTNXIRZRKTXAK5N3OQVE","bundle":"https://pith.science/pith/IOXP2ZCTNXIRZRKTXAK5N3OQVE/bundle.json","state":"https://pith.science/pith/IOXP2ZCTNXIRZRKTXAK5N3OQVE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IOXP2ZCTNXIRZRKTXAK5N3OQVE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:IOXP2ZCTNXIRZRKTXAK5N3OQVE","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":"237ac1ba8899a1844bdc506a4cd5afd3b10fe6a0b7df62c4d7bda97a52fb75db","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-03-17T11:31:41Z","title_canon_sha256":"bc9b38e5f1c2714d52931219f137ffba300d05a5f5fd748cfecb0ddccdefeccd"},"schema_version":"1.0","source":{"id":"0803.2235","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0803.2235","created_at":"2026-05-18T04:40:54Z"},{"alias_kind":"arxiv_version","alias_value":"0803.2235v3","created_at":"2026-05-18T04:40:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0803.2235","created_at":"2026-05-18T04:40:54Z"},{"alias_kind":"pith_short_12","alias_value":"IOXP2ZCTNXIR","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"IOXP2ZCTNXIRZRKT","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"IOXP2ZCT","created_at":"2026-05-18T12:25:57Z"}],"graph_snapshots":[{"event_id":"sha256:ffb7000342acd4d205ac8c0d5dbc7bee5645878d1bf43344b536988fdcf5baed","target":"graph","created_at":"2026-05-18T04:40:54Z","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"},"paper":{"abstract_excerpt":"We analyse Spitzer images of 30 long-duration gamma-ray burst (GRB) host galaxies. We estimate their total stellar masses (M*) based on the rest-frame K-band luminosities (L_Krest) and constrain their star formation rates (SFRs, not corrected for dust extinction) based on the rest-frame UV continua. Further, we compute a mean M*/L_Krest = 0.45 Msun/Lsun. We find that the hosts are low M*, star-forming systems. The median M* in our sample (<M*> = 10^9.7 Msun) is lower than that of \"field\" galaxies (e.g., Gemini Deep Deep Survey). The range spanned by M* is 10^7 Msun < M* < 10^11 Msun, while the","authors_text":"2), 3), D. Malesani (1), D. Watson (1), J. Gorosabel (4), J. Hjorth (1), J. M. Castro Cer\\'on (1, J. P. U. Fynbo (1), M. J. Micha{\\l}owski (1, M. Morales Calder\\'on (5); ((1) Dark Cosmology Centre (NBI) Copenhagen; (2) Herschel Science Centre (ESA/ESAC) Madrid; (3) Institute for Astronomy (ROE) Edinburgh; (4) Instituto de Astrof\\'isica de Andaluc\\'ia (CSIC) Granada; (5) Spitzer Science Centre (Caltech) Pasadena)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-03-17T11:31:41Z","title":"On the distribution of stellar masses in gamma-ray burst host galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0803.2235","kind":"arxiv","version":3},"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":"sha256:6cd7dd7f8f3e654e0523f41d13178c9891add59e5f8ffe45f456571af02164fa","target":"record","created_at":"2026-05-18T04:40:54Z","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":"237ac1ba8899a1844bdc506a4cd5afd3b10fe6a0b7df62c4d7bda97a52fb75db","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-03-17T11:31:41Z","title_canon_sha256":"bc9b38e5f1c2714d52931219f137ffba300d05a5f5fd748cfecb0ddccdefeccd"},"schema_version":"1.0","source":{"id":"0803.2235","kind":"arxiv","version":3}},"canonical_sha256":"43aefd64536dd11cc553b815d6edd0a93bc361535fd8919a72b3319045e6ccaa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"43aefd64536dd11cc553b815d6edd0a93bc361535fd8919a72b3319045e6ccaa","first_computed_at":"2026-05-18T04:40:54.821706Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:40:54.821706Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"W9hoWW3Ok20gaC3VHvhIE61BA2dizG2PrhAiOhZILFkNCCP2Nypd3iyoJwXmi7c1xeYm/D06NiHHAOGlser/DA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:40:54.822218Z","signed_message":"canonical_sha256_bytes"},"source_id":"0803.2235","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6cd7dd7f8f3e654e0523f41d13178c9891add59e5f8ffe45f456571af02164fa","sha256:ffb7000342acd4d205ac8c0d5dbc7bee5645878d1bf43344b536988fdcf5baed"],"state_sha256":"bbe629c6477853909cce3b28f4bd1477ce0d68982ef7a02688d3e2f078419927"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Pkxr67ChQDCatjDKPpiIixqzeWjIPaRYZqzh5wc/h92x9USx3dEbUkDY29MlpqCMFjqe3a5VUyseVE2p7cJJDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T08:15:16.150452Z","bundle_sha256":"65b0256a6c7ae0323ba43a28a7a119eb2e29b6b8fc51ea7ddd3a2b6fa8e391a5"}}