Pith Number

pith:TPRXHMDL

pith:2013:TPRXHMDLQ3HAHGYM5CG2YTMQ6E

not attested not anchored not stored refs pending

Direct Determination of the HF/H2 Abundance Ratio in Interstellar Gas

A. Seifahrt, D. A. Neufeld, M. J. Richter, Nick Indriolo

arxiv:1301.1953 v1 · 2013-01-09 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TPRXHMDLQ3HAHGYM5CG2YTMQ6E}

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	2026-05-18T01:52:14.265378Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9be373b06b86ce039b0ce88dac4d90f107317dcbdd045ede3fea90630166341e

Aliases

arxiv: 1301.1953 · arxiv_version: 1301.1953v1 · doi: 10.48550/arxiv.1301.1953 · pith_short_12: TPRXHMDLQ3HA · pith_short_16: TPRXHMDLQ3HAHGYM · pith_short_8: TPRXHMDL

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/TPRXHMDLQ3HAHGYM5CG2YTMQ6E \
  | 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: 9be373b06b86ce039b0ce88dac4d90f107317dcbdd045ede3fea90630166341e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d6e4ec9e1a52f17ac3f880f0a9ebdc461df44206b8780c073f7170b08f258519",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2013-01-09T19:24:08Z",
    "title_canon_sha256": "6c16be14e76d833db5070fe7243ff56b67f3c4d3607bcc9797046a462c4985a1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.1953",
    "kind": "arxiv",
    "version": 1
  }
}