Pith Number

pith:2SAYEU2E

pith:2018:2SAYEU2ECJ27MHMQYQSSX3VEQK

not attested not anchored not stored refs pending

Optical properties of amorphous carbon dust around C-stars: new constraints from 2MASS and Gaia observations

Ambra Nanni

arxiv:1811.02620 v2 · 2018-11-06 · astro-ph.SR · 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{2SAYEU2ECJ27MHMQYQSSX3VEQK}

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	2026-05-17T23:59:48.607893Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d4818253441275f61d90c4252beea4828e633caf35c744e791c4a6ae9f43bb29

Aliases

arxiv: 1811.02620 · arxiv_version: 1811.02620v2 · doi: 10.48550/arxiv.1811.02620 · pith_short_12: 2SAYEU2ECJ27 · pith_short_16: 2SAYEU2ECJ27MHMQ · pith_short_8: 2SAYEU2E

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/2SAYEU2ECJ27MHMQYQSSX3VEQK \
  | 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: d4818253441275f61d90c4252beea4828e633caf35c744e791c4a6ae9f43bb29

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c6267e98a5ddf649c76ba76a08bb507d7a6619b0483d6f666ad92f0eb5b90bc6",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-11-06T20:32:42Z",
    "title_canon_sha256": "d52fbded85fd2625f3e7184f38e1676553f0077c4a1aa6b7ed2c65668417d212"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.02620",
    "kind": "arxiv",
    "version": 2
  }
}