Pith Number

pith:FEVHAVC3

pith:2013:FEVHAVC3CXZ77EDNGFP2DY5SUC

not attested not anchored not stored refs pending

Luminous and Variable Stars in M31 and M33. I. The Warm Hypergiants and Post-Red Supergiant Evolution

Birgitta Burggraf, John C. Martin, Kerstin Weis, Kris Davidson, Nathan Kneeland, Roberta M. Humphreys, Skyler Grammer

arxiv:1305.6051 v1 · 2013-05-26 · 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{FEVHAVC3CXZ77EDNGFP2DY5SUC}

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	2026-05-18T01:49:41.372613Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

292a70545b15f3ff906d315fa1e3b2a094389e95f92dedeea42382ee8866be86

Aliases

arxiv: 1305.6051 · arxiv_version: 1305.6051v1 · doi: 10.48550/arxiv.1305.6051 · pith_short_12: FEVHAVC3CXZ7 · pith_short_16: FEVHAVC3CXZ77EDN · pith_short_8: FEVHAVC3

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/FEVHAVC3CXZ77EDNGFP2DY5SUC \
  | 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: 292a70545b15f3ff906d315fa1e3b2a094389e95f92dedeea42382ee8866be86

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0e29ad0b7019569fad12ad73280b3fba893b2b9b70d2b1fe2c848da81776ed6d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2013-05-26T18:58:31Z",
    "title_canon_sha256": "2927e6a20f14238694250d8c85aba85ce30a233529f48bc93ee7f21bb9141199"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.6051",
    "kind": "arxiv",
    "version": 1
  }
}