Pith Number

pith:Q53HOROP

pith:2009:Q53HOROPZZF3ZFQGWBT3SEDZIN

not attested not anchored not stored refs pending

On-disk counterparts of type II spicules in the Ca II 854.2 nm and Halpha lines

B. De Pontieu, G. Vissers, J. Leenaarts, L. Rouppe van der Voort, M. Carlsson

arxiv:0909.2115 v1 · 2009-09-11 · 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{Q53HOROPZZF3ZFQGWBT3SEDZIN}

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	2026-05-18T02:34:30.414370Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

87767745cfce4bbc9606b067b91079437373a8105e9ac16b7317f1edd7a25b07

Aliases

arxiv: 0909.2115 · arxiv_version: 0909.2115v1 · doi: 10.48550/arxiv.0909.2115 · pith_short_12: Q53HOROPZZF3 · pith_short_16: Q53HOROPZZF3ZFQG · pith_short_8: Q53HOROP

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/Q53HOROPZZF3ZFQGWBT3SEDZIN \
  | 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: 87767745cfce4bbc9606b067b91079437373a8105e9ac16b7317f1edd7a25b07

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "011ade9d96af22c9d318ec7c83f581826b869479375bf0184888093e75eb9b74",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-09-11T09:04:31Z",
    "title_canon_sha256": "c0c5fd7a6536532ff0430de3891941be4836359dbb5a8604e054ec800b69064c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.2115",
    "kind": "arxiv",
    "version": 1
  }
}