Pith Number

pith:TOHHSHWM

pith:2019:TOHHSHWMZXCAXXUNEK3236TQX4

not attested not anchored not stored refs pending

Historical solar Ca II K observations at the Rome and Catania observatories

Fabrizio Giorgi, Ilaria Ermolli, Mariachiara Falco, Natalie A. Krivova, Paolo Romano, Salvo L. Guglielmino, Sami K. Solanki, Theodosios Chatzistergos

arxiv:1902.07483 v1 · 2019-02-20 · 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{TOHHSHWMZXCAXXUNEK3236TQX4}

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	2026-05-17T23:40:33.285272Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9b8e791ecccdc40bde8d22b7adfa70bf2c30d522b02b5584e0296507bb5d13f1

Aliases

arxiv: 1902.07483 · arxiv_version: 1902.07483v1 · doi: 10.48550/arxiv.1902.07483 · pith_short_12: TOHHSHWMZXCA · pith_short_16: TOHHSHWMZXCAXXUN · pith_short_8: TOHHSHWM

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/TOHHSHWMZXCAXXUNEK3236TQX4 \
  | 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: 9b8e791ecccdc40bde8d22b7adfa70bf2c30d522b02b5584e0296507bb5d13f1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b8fcf13e93ccd4fdfe1bcdb8fb730b84190741b87b4db02e3085da884802e2ab",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2019-02-20T10:08:50Z",
    "title_canon_sha256": "6f493ab6867e742da95795fe8cf2ea74c5f3eff4ca4cdcd2802381038b1542ee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.07483",
    "kind": "arxiv",
    "version": 1
  }
}