Pith Number

pith:J6DRXGI7

pith:2007:J6DRXGI7AOQ22BQCCD2QQC2SY6

not attested not anchored not stored refs pending

Gaps in the cloud cover? Comparing extinction measures in spiral disks

B. Buckalew, B. W. Holwerda, C. Bot, C. W. Engelbracht, D. Calzetti, D. Dale, J. D. Smith, K. D. Gordon, M. Meyer, M. Regan, M. Thornley, R. A. Gonzalez, R. C. Kennicutt, T. Jarrett

arxiv:0707.4167 v1 · 2007-07-27 · 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{J6DRXGI7AOQ22BQCCD2QQC2SY6}

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	2026-07-04T15:24:31.188118Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4f871b991f03a1ad060210f5080b52c7bae13d4367ec137176a3e776a2a2c0f5

Aliases

arxiv: 0707.4167 · arxiv_version: 0707.4167v1 · doi: 10.48550/arxiv.0707.4167 · pith_short_12: J6DRXGI7AOQ2 · pith_short_16: J6DRXGI7AOQ22BQC · pith_short_8: J6DRXGI7

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/J6DRXGI7AOQ22BQCCD2QQC2SY6 \
  | 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: 4f871b991f03a1ad060210f5080b52c7bae13d4367ec137176a3e776a2a2c0f5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "815907af72537f077a37ea6e8b3f1b30bf7cfbf13ed8d477c5af8e2313eafb2b",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-07-27T19:40:43Z",
    "title_canon_sha256": "1fc6397d5cb1d4b5f63e731b987b3227b64fc251d27f3f8a7dc72afd754051ca"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0707.4167",
    "kind": "arxiv",
    "version": 1
  }
}