Pith Number

pith:QWRZSDYF

pith:2017:QWRZSDYFKVMFE6X3FJG4E3RX7Q

not attested not anchored not stored refs pending

Analysis of full disc Ca II K spectroheliograms. I. Photometric calibration and CLV compensation

Ilaria Ermolli, Natalie A. Krivova, Sami K. Solanki, Theodosios Chatzistergos

arxiv:1710.04949 v1 · 2017-10-13 · 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{QWRZSDYFKVMFE6X3FJG4E3RX7Q}

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	2026-05-18T00:25:16.812030Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85a3990f055558527afb2a4dc26e37fc2194b8aba64cfc7bf7593b195852f073

Aliases

arxiv: 1710.04949 · arxiv_version: 1710.04949v1 · doi: 10.48550/arxiv.1710.04949 · pith_short_12: QWRZSDYFKVMF · pith_short_16: QWRZSDYFKVMFE6X3 · pith_short_8: QWRZSDYF

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/QWRZSDYFKVMFE6X3FJG4E3RX7Q \
  | 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: 85a3990f055558527afb2a4dc26e37fc2194b8aba64cfc7bf7593b195852f073

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "72cd3a42c73c82bc8e0bd5ffd2e711ce473c82b30f3da525eec95f64b103b827",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2017-10-13T14:53:04Z",
    "title_canon_sha256": "1caacee9bb56f8241fc56cb32fc2187543846192f0d5b3ba4a2ac0c57fb0125a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1710.04949",
    "kind": "arxiv",
    "version": 1
  }
}