Pith Number

pith:GDDTWIXF

pith:2019:GDDTWIXFWADSW7YKZ5NRRIBDQN

not attested not anchored not stored refs pending

First stellar spectroscopy in Leo P

A. M. N. Ferguson, B. Davies, C. J. Evans, D. J. Lennon, D. R. Weisz, J. S. Clark, J. S. Vink, L. R. Patrick, M. Garcia, M.-R. L. Cioni, N. Bastian, N. Castro, O. A. Gonzalez, S. Kamann

arxiv:1901.01295 v2 · 2019-01-04 · astro-ph.SR · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GDDTWIXFWADSW7YKZ5NRRIBDQN}

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

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	2026-05-17T23:54:08.072778Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

30c73b22e5b0072b7f0acf5b18a023834d5e597205958eb05db46c2de0949fda

Aliases

arxiv: 1901.01295 · arxiv_version: 1901.01295v2 · doi: 10.48550/arxiv.1901.01295 · pith_short_12: GDDTWIXFWADS · pith_short_16: GDDTWIXFWADSW7YK · pith_short_8: GDDTWIXF

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/GDDTWIXFWADSW7YKZ5NRRIBDQN \
  | 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: 30c73b22e5b0072b7f0acf5b18a023834d5e597205958eb05db46c2de0949fda

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d1df4149ef572bcc0bb6d1b75346b743f642d1857f683632098b1573f481f9e4",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2019-01-04T20:04:20Z",
    "title_canon_sha256": "371fa240b57f1697326d70d6be8ec8ce3c9d83583909688cb9dfbd157a9ce250"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.01295",
    "kind": "arxiv",
    "version": 2
  }
}