Pith Number

pith:D75W5ETH

pith:2011:D75W5ETHL47JZRJCBXPELWDGKR

not attested not anchored not stored refs pending

Spitzer IRS Spectroscopy of the 10 Myr-old EF Cha Debris Disk: Evidence for Phyllosilicate-Rich Dust in the Terrestrial Zone

Aurora Sicilia-Aguilar (MPIA-Heidelberg), Carey M. Lisse (Johns Hopkins University/APL), George H. Rieke (Arizona), Kate Su (Arizona), Thayne Currie (NASA-Goddard)

arxiv:1104.1431 v1 · 2011-04-07 · astro-ph.SR · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{D75W5ETHL47JZRJCBXPELWDGKR}

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	2026-05-18T02:02:36.546279Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1ffb6e92675f3e9cc5220dde45d86654508c1c9cb2dcfb6dcb29ee205c60fa97

Aliases

arxiv: 1104.1431 · arxiv_version: 1104.1431v1 · doi: 10.48550/arxiv.1104.1431 · pith_short_12: D75W5ETHL47J · pith_short_16: D75W5ETHL47JZRJC · pith_short_8: D75W5ETH

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/D75W5ETHL47JZRJCBXPELWDGKR \
  | 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: 1ffb6e92675f3e9cc5220dde45d86654508c1c9cb2dcfb6dcb29ee205c60fa97

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d14ede81d6b784a67694fe3947b243f2c9f6dea9a231fcae6061007aeb72333f",
    "cross_cats_sorted": [
      "astro-ph.EP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2011-04-07T20:00:25Z",
    "title_canon_sha256": "000afa05bfeecc9bad98f1170b764a823499ee55958a139fb76f0daf413f2402"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.1431",
    "kind": "arxiv",
    "version": 1
  }
}