Pith Number

pith:VOPKRMFC

pith:2021:VOPKRMFC2SV7NO5PKRM275A5V3

not attested not anchored not stored refs pending

UV Spectropolarimetry with Polstar: Protoplanetary Disks

Andrei V. Berdyugin, Jamie R. Lomax, John P. Wisniewski, Jorick S. Vink, Kellen D. Lawson, Ken Gayley, Maud Langlois, Motohide Tamura, Paul A. Scowen, Rene D. Oudmaijer, Richard Ignace, Ruobing Dong, Sean D. Brittain, Svetlana V. Berdyugina, Vladimir S. Airapetian, William C. Danchi

arxiv:2111.06891 v2 · 2021-11-12 · astro-ph.IM · astro-ph.EP · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VOPKRMFC2SV7NO5PKRM275A5V3}

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	2026-07-05T05:26:35.984716Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ab9ea8b0a2d4abf6bbaf5459aff41daee8fa37a0787e1997c7184cea51dedbcb

Aliases

arxiv: 2111.06891 · arxiv_version: 2111.06891v2 · doi: 10.48550/arxiv.2111.06891 · pith_short_12: VOPKRMFC2SV7 · pith_short_16: VOPKRMFC2SV7NO5P · pith_short_8: VOPKRMFC

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/VOPKRMFC2SV7NO5PKRM275A5V3 \
  | 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: ab9ea8b0a2d4abf6bbaf5459aff41daee8fa37a0787e1997c7184cea51dedbcb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "229b4b11ac69cc8223291550c75f8acb48694568e7e0c4b886873bcdb4851f57",
    "cross_cats_sorted": [
      "astro-ph.EP",
      "astro-ph.SR"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2021-11-12T14:37:36Z",
    "title_canon_sha256": "87e5620eb9798342a3140e71b16df5656c05a9ab3083abb10f50bb034f2133f8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2111.06891",
    "kind": "arxiv",
    "version": 2
  }
}