Pith Number

pith:TFATUMRU

pith:2018:TFATUMRUJJUPUESYYDWLLBC66P

not attested not anchored not stored refs pending

Luminous and Variable Stars in NGC 2403 and M81

Kris Davidson, Michael S. Gordon, Roberta M. Humphreys, Sarah Stangl, Skyler H. Grammer

arxiv:1811.06559 v1 · 2018-11-15 · 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{TFATUMRUJJUPUESYYDWLLBC66P}

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	2026-05-17T23:56:44.882287Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

99413a32344a68fa1258c0ecb5845ef3f8176161fd9be5d91782a41b9c260213

Aliases

arxiv: 1811.06559 · arxiv_version: 1811.06559v1 · doi: 10.48550/arxiv.1811.06559 · pith_short_12: TFATUMRUJJUP · pith_short_16: TFATUMRUJJUPUESY · pith_short_8: TFATUMRU

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/TFATUMRUJJUPUESYYDWLLBC66P \
  | 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: 99413a32344a68fa1258c0ecb5845ef3f8176161fd9be5d91782a41b9c260213

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "74f8f2a3f031d6c57e52df262588f919f0b97cf63bee1f2a48bd7e4d4d07c0a0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-11-15T19:03:03Z",
    "title_canon_sha256": "0eabe9212f74c7ad5a6a2f62212dc4d1ef9118c7f772052551ddda311c2ab2bf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.06559",
    "kind": "arxiv",
    "version": 1
  }
}