Pith Number

pith:PIR4R2HZ

pith:2009:PIR4R2HZEGYTSAGZUK6TQGWM6K

not attested not anchored not stored refs pending

On the Carriers of the 21 Micron Emission Feature in Post-Asymptotic Giant Branch Stars

A. Li, B. W. Jiang, K. Zhang

arxiv:0903.4541 v1 · 2009-03-26 · astro-ph.GA · 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{PIR4R2HZEGYTSAGZUK6TQGWM6K}

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	2026-05-18T02:14:25.841968Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7a23c8e8f921b13900d9a2bd381accf2a7000dddc4b97cea588c111d6ef849e3

Aliases

arxiv: 0903.4541 · arxiv_version: 0903.4541v1 · doi: 10.48550/arxiv.0903.4541 · pith_short_12: PIR4R2HZEGYT · pith_short_16: PIR4R2HZEGYTSAGZ · pith_short_8: PIR4R2HZ

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/PIR4R2HZEGYTSAGZUK6TQGWM6K \
  | 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: 7a23c8e8f921b13900d9a2bd381accf2a7000dddc4b97cea588c111d6ef849e3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cd612a2a51e1b95e2add52d77709407d34c1636b776f971dfde3bbfa36f58104",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-03-26T10:00:53Z",
    "title_canon_sha256": "443c1aa16af93258415312a0170ff4dd19378387d24018030bb3f604b3a11fa8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.4541",
    "kind": "arxiv",
    "version": 1
  }
}