Pith Number

pith:ETVXQE4B

pith:1998:ETVXQE4B6C553FLL77VTG6QQWN

not attested not anchored not stored refs pending

The Ratio of Ortho- to Para-H2 in Photodissociation Regions

Amiel Sternberg (Tel Aviv, David A. Neufeld (JHU), UC Berkeley)

arxiv:astro-ph/9812049 v1 · 1998-12-02 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ETVXQE4B6C553FLL77VTG6QQWN}

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.

Cited by

1 paper in Pith

Resolving dense photo-dissociation regions: the structure of photochemical fronts in three-dimensional gas distributions

Receipt and verification

First computed	2026-07-04T16:07:19.565018Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

24eb781381f0bbdd956bffeb337a10b35ec1608165477aad0374838a68e99a36

Aliases

arxiv: astro-ph/9812049 · arxiv_version: astro-ph/9812049v1 · doi: 10.48550/arxiv.astro-ph/9812049 · pith_short_12: ETVXQE4B6C55 · pith_short_16: ETVXQE4B6C553FLL · pith_short_8: ETVXQE4B

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/ETVXQE4B6C553FLL77VTG6QQWN \
  | 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: 24eb781381f0bbdd956bffeb337a10b35ec1608165477aad0374838a68e99a36

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "15aa45785b7504fc335aee9e93ad243d15da5a3b3b38fc704ba81a89f574a75d",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-12-02T16:39:05Z",
    "title_canon_sha256": "91618eb7ab21878f3001668b87384d1fea2bdf722d2302404d7ee47cbdf70e06"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9812049",
    "kind": "arxiv",
    "version": 1
  }
}