Pith Number

pith:NT266UDU

pith:2020:NT266UDUVQJULDYFETBV2ZCJQC

not attested not anchored not stored refs pending

Optical/near-infrared observations of the Fried Egg Nebula: Multiple shell ejections on a 100 yr timescale from a massive yellow hypergiant

A. Zijlstra, C. Wichittanakom, E. Koumpia, E. Lagadec, F. Millour, G. Banyard, H. Van Winckel, J. H. Black, J. S. Vink, K. M. Ababakr, M. Hillen, N. L. J. Cox, R. D. Oudmaijer, R. Szczerba, S. H. J. Wallstrom, S. Muller, V. Graham, W.-J. de Wit

arxiv:2002.02499 v1 · 2020-02-06 · astro-ph.SR

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NT266UDUVQJULDYFETBV2ZCJQC}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-05T00:51:40.287450Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6cf5ef5074ac13458f0524c35d644980a1573fca5d255ea5d5f348065bba8fc4

Aliases

arxiv: 2002.02499 · arxiv_version: 2002.02499v1 · doi: 10.48550/arxiv.2002.02499 · pith_short_12: NT266UDUVQJU · pith_short_16: NT266UDUVQJULDYF · pith_short_8: NT266UDU

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/NT266UDUVQJULDYFETBV2ZCJQC \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 6cf5ef5074ac13458f0524c35d644980a1573fca5d255ea5d5f348065bba8fc4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7a3cefdcc3bd824d8db959229119f325806aca130307d589e69b79ccb2767202",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2020-02-06T20:13:05Z",
    "title_canon_sha256": "8fe9f270b9a9b70dbd2e2173c63c028d5586df44bf9331619dedde5f4c280a5b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2002.02499",
    "kind": "arxiv",
    "version": 1
  }
}