Pith Number

pith:6AM4OQXF

pith:2008:6AM4OQXFA5EBTPVPPKNLP6QQF4

not attested not anchored not stored refs pending

Observational $5-20\mu$m Interstellar Extinction Curves Toward Star-Forming Regions Derived from Spitzer IRS Spectra

M. K. McClure

arxiv:0810.4561 v2 · 2008-10-24 · 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{6AM4OQXFA5EBTPVPPKNLP6QQF4}

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	2026-05-18T04:29:25.734826Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f019c742e5074819beaf7a9ab7fa102f166ace1ee7ef08f9a573b69977ed216b

Aliases

arxiv: 0810.4561 · arxiv_version: 0810.4561v2 · doi: 10.48550/arxiv.0810.4561 · pith_short_12: 6AM4OQXFA5EB · pith_short_16: 6AM4OQXFA5EBTPVP · pith_short_8: 6AM4OQXF

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/6AM4OQXFA5EBTPVPPKNLP6QQF4 \
  | 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: f019c742e5074819beaf7a9ab7fa102f166ace1ee7ef08f9a573b69977ed216b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0526999928d52481058d9da41994cb93528a41830491a10a098d2f56bb8db03f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-10-24T22:15:28Z",
    "title_canon_sha256": "c4125a8772738af508da73850c2d3e5ae690c55fe9918a90ff9d76fb5998bc0a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0810.4561",
    "kind": "arxiv",
    "version": 2
  }
}