Pith Number

pith:PSA7DYFX

pith:2013:PSA7DYFXKN7U27U6TUSH7J43WN

not attested not anchored not stored refs pending

The Mid-Infrared Extinction Law and its Variation in the Coalsack Nebula

Aigen Li, B.W. Jiang, Jian Gao, Shu Wang, Yang Chen

arxiv:1306.4441 v1 · 2013-06-19 · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PSA7DYFXKN7U27U6TUSH7J43WN}

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	2026-05-18T01:49:15.006731Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7c81f1e0b7537f4d7e9e9d247fa79bb3770d737af05e384824b7398ccc0497a5

Aliases

arxiv: 1306.4441 · arxiv_version: 1306.4441v1 · doi: 10.48550/arxiv.1306.4441 · pith_short_12: PSA7DYFXKN7U · pith_short_16: PSA7DYFXKN7U27U6 · pith_short_8: PSA7DYFX

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/PSA7DYFXKN7U27U6TUSH7J43WN \
  | 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: 7c81f1e0b7537f4d7e9e9d247fa79bb3770d737af05e384824b7398ccc0497a5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bcb4d9412dd408782e5a081ccd05cd95199645f55f2e8e468cb9e622f0cb8478",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2013-06-19T07:23:27Z",
    "title_canon_sha256": "cc40350aee3278d0832d6c15992a2ec0d9c5da3a2ab998cb0d8e0538f23564a1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.4441",
    "kind": "arxiv",
    "version": 1
  }
}