Pith Number

pith:PTT2T6VK

pith:1997:PTT2T6VKYARSMYT2FKTGPOSP63

not attested not anchored not stored refs pending

The Abundance of Interstellar Nitrogen

David M. Meyer (Northwestern Univ.), Jason A. Cardelli, Ulysses J. Sofia (Villanova Univ.)

arxiv:astro-ph/9710162 v1 · 1997-10-15 · 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{PTT2T6VKYARSMYT2FKTGPOSP63}

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	2026-07-04T16:03:18.362255Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7ce7a9faaac02326627a2aa667ba4ff6ed52ed4d9cb8bfa4b387cb962124f8a0

Aliases

arxiv: astro-ph/9710162 · arxiv_version: astro-ph/9710162v1 · doi: 10.48550/arxiv.astro-ph/9710162 · pith_short_12: PTT2T6VKYARS · pith_short_16: PTT2T6VKYARSMYT2 · pith_short_8: PTT2T6VK

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/PTT2T6VKYARSMYT2FKTGPOSP63 \
  | 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: 7ce7a9faaac02326627a2aa667ba4ff6ed52ed4d9cb8bfa4b387cb962124f8a0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "daff58fca39710dc02221c3e880f536879e2c32a0a8fdb1ab984756299cc54c6",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-10-15T14:23:03Z",
    "title_canon_sha256": "02220b2afc58bfcbcd100472a85285253e19d444a94d0b2b38cf032d3b58510c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9710162",
    "kind": "arxiv",
    "version": 1
  }
}