Pith Number

pith:PJQPTQ3G

pith:2009:PJQPTQ3GLPAEX7PYHH3HK4KDEN

not attested not anchored not stored refs pending

Probing the Protostellar Envelope around L1157: the Dust and Gas Connection

Hsin-Fang Chiang, John J. Tobin, Lee Hartmann, Leslie W. Looney

arxiv:0912.4527 v1 · 2009-12-22 · 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{PJQPTQ3GLPAEX7PYHH3HK4KDEN}

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	2026-05-18T02:33:55.576981Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7a60f9c3665bc04bfdf839f67571432357c80e4eb3176c0838197e03481f54fe

Aliases

arxiv: 0912.4527 · arxiv_version: 0912.4527v1 · doi: 10.48550/arxiv.0912.4527 · pith_short_12: PJQPTQ3GLPAE · pith_short_16: PJQPTQ3GLPAEX7PY · pith_short_8: PJQPTQ3G

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/PJQPTQ3GLPAEX7PYHH3HK4KDEN \
  | 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: 7a60f9c3665bc04bfdf839f67571432357c80e4eb3176c0838197e03481f54fe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "00d0acbad468bc496393d5e10f55c28d33a29f9d56dc76f9d91b843194bc4662",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-12-22T22:47:36Z",
    "title_canon_sha256": "1384e69a97550c2642d8b50ca3f87938abe20e1c8694e302b96701fef3c2f9b3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.4527",
    "kind": "arxiv",
    "version": 1
  }
}