Pith Number

pith:7RIJUWV5

pith:2009:7RIJUWV5EV3J4UTHMSVUZEX4AZ

not attested not anchored not stored refs pending

Spitzer 24 um Images of Planetary Nebulae

A. Caulet, J. Bilikova, J.L. Hora, K. Volk, K.Y.L. Su, M.A. Guerrero, M. Cohen, Q.A. Parker, R.A. Gruendl, T. Rauch, W.-P. Chen, Y.-H. Chu

arxiv:0906.4820 v2 · 2009-06-25 · 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{7RIJUWV5EV3J4UTHMSVUZEX4AZ}

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	2026-05-18T02:13:12.586830Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc509a5abd25769e526764ab4c92fc066ee0265015e24dd5fd7bad62d9db0d79

Aliases

arxiv: 0906.4820 · arxiv_version: 0906.4820v2 · doi: 10.48550/arxiv.0906.4820 · pith_short_12: 7RIJUWV5EV3J · pith_short_16: 7RIJUWV5EV3J4UTH · pith_short_8: 7RIJUWV5

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/7RIJUWV5EV3J4UTHMSVUZEX4AZ \
  | 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: fc509a5abd25769e526764ab4c92fc066ee0265015e24dd5fd7bad62d9db0d79

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a49524d3f0c66fe38a2972ef767d65432d43eb9bcd05e8634dc6c226b62a9ff0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-06-25T23:59:22Z",
    "title_canon_sha256": "67e29ffed7cc7f712097ec8034f59e8bf30c89158b43be3125662def10be9b32"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.4820",
    "kind": "arxiv",
    "version": 2
  }
}