{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:PTGK2MKTP3FRB4CSWXLHWELOMR","short_pith_number":"pith:PTGK2MKT","schema_version":"1.0","canonical_sha256":"7cccad31537ecb10f052b5d67b116e6444ef179fe928b2aa80315c9edc1d32fb","source":{"kind":"arxiv","id":"1812.09454","version":1},"attestation_state":"computed","paper":{"title":"Multi-epoch VLBI of a double maser super burst","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Alexandr Volvach, Benito Marcote, Busaba Kramer, Crystal Brogan, Gabor Orosz, Gabriele Surcis, Georgij Rudnitskii, Gordon MacLeod, Huib van Langevelde, Irina Valtts, James O. Chibueze, Jay Blanchard, Katharina Immer, Kee-Tae Kim, Larisa Volvach, Mateusz Olech, Nadya Shakhvorostova, Olga Bayandina, Ross A. Burns, Stan Kurtz, Todd Hunter, Tomoya Hirota, Willem Baan","submitted_at":"2018-12-22T05:37:45Z","abstract_excerpt":"In a rare and spectacular display, two well-known massive star forming regions, W49N and G25.65+1.05, recently underwent maser 'super burst' - their fluxes suddenly increasing above 30,000 and 18,000 Jy, respectively, reaching several orders of magnitude above their usual values. In quick-response, ToO observations with the EVN, VLBA and KaVA were obtained constituting a 4 week campaign - producing a high-cadence multi-epoch VLBI investigation of the maser emission. The combination of high-resolution, polarisation and flux monitoring during the burst provides one of the best accounts, to date,"},"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":"1812.09454","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-12-22T05:37:45Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"f6cbe2d5ce0520efa9fce3eac448f75349334905b58dab7781a8dcd0a08b15fe","abstract_canon_sha256":"0fa9ffbf930c3f5e9390d16748d71545592a9c8ec521cd2a0c36c155902394ee"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:57:27.884096Z","signature_b64":"/wqdw3MaQYFQ85KBcmgRiDdgk98jcfXGnHPNYB2pll/4oa7QJJiSN6PQBQVjnfyJH+V2wotWSzJpS0YIswcJBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7cccad31537ecb10f052b5d67b116e6444ef179fe928b2aa80315c9edc1d32fb","last_reissued_at":"2026-05-17T23:57:27.883374Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:57:27.883374Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Multi-epoch VLBI of a double maser super burst","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Alexandr Volvach, Benito Marcote, Busaba Kramer, Crystal Brogan, Gabor Orosz, Gabriele Surcis, Georgij Rudnitskii, Gordon MacLeod, Huib van Langevelde, Irina Valtts, James O. Chibueze, Jay Blanchard, Katharina Immer, Kee-Tae Kim, Larisa Volvach, Mateusz Olech, Nadya Shakhvorostova, Olga Bayandina, Ross A. Burns, Stan Kurtz, Todd Hunter, Tomoya Hirota, Willem Baan","submitted_at":"2018-12-22T05:37:45Z","abstract_excerpt":"In a rare and spectacular display, two well-known massive star forming regions, W49N and G25.65+1.05, recently underwent maser 'super burst' - their fluxes suddenly increasing above 30,000 and 18,000 Jy, respectively, reaching several orders of magnitude above their usual values. In quick-response, ToO observations with the EVN, VLBA and KaVA were obtained constituting a 4 week campaign - producing a high-cadence multi-epoch VLBI investigation of the maser emission. The combination of high-resolution, polarisation and flux monitoring during the burst provides one of the best accounts, to date,"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.09454","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":""},"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":"1812.09454","created_at":"2026-05-17T23:57:27.883494+00:00"},{"alias_kind":"arxiv_version","alias_value":"1812.09454v1","created_at":"2026-05-17T23:57:27.883494+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.09454","created_at":"2026-05-17T23:57:27.883494+00:00"},{"alias_kind":"pith_short_12","alias_value":"PTGK2MKTP3FR","created_at":"2026-05-18T12:32:46.962924+00:00"},{"alias_kind":"pith_short_16","alias_value":"PTGK2MKTP3FRB4CS","created_at":"2026-05-18T12:32:46.962924+00:00"},{"alias_kind":"pith_short_8","alias_value":"PTGK2MKT","created_at":"2026-05-18T12:32:46.962924+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/PTGK2MKTP3FRB4CSWXLHWELOMR","json":"https://pith.science/pith/PTGK2MKTP3FRB4CSWXLHWELOMR.json","graph_json":"https://pith.science/api/pith-number/PTGK2MKTP3FRB4CSWXLHWELOMR/graph.json","events_json":"https://pith.science/api/pith-number/PTGK2MKTP3FRB4CSWXLHWELOMR/events.json","paper":"https://pith.science/paper/PTGK2MKT"},"agent_actions":{"view_html":"https://pith.science/pith/PTGK2MKTP3FRB4CSWXLHWELOMR","download_json":"https://pith.science/pith/PTGK2MKTP3FRB4CSWXLHWELOMR.json","view_paper":"https://pith.science/paper/PTGK2MKT","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1812.09454&json=true","fetch_graph":"https://pith.science/api/pith-number/PTGK2MKTP3FRB4CSWXLHWELOMR/graph.json","fetch_events":"https://pith.science/api/pith-number/PTGK2MKTP3FRB4CSWXLHWELOMR/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/PTGK2MKTP3FRB4CSWXLHWELOMR/action/timestamp_anchor","attest_storage":"https://pith.science/pith/PTGK2MKTP3FRB4CSWXLHWELOMR/action/storage_attestation","attest_author":"https://pith.science/pith/PTGK2MKTP3FRB4CSWXLHWELOMR/action/author_attestation","sign_citation":"https://pith.science/pith/PTGK2MKTP3FRB4CSWXLHWELOMR/action/citation_signature","submit_replication":"https://pith.science/pith/PTGK2MKTP3FRB4CSWXLHWELOMR/action/replication_record"}},"created_at":"2026-05-17T23:57:27.883494+00:00","updated_at":"2026-05-17T23:57:27.883494+00:00"}