Pith Number

pith:YXEJGPQK

pith:2017:YXEJGPQKYIZMHU4EW4NKK3ZEX2

not attested not anchored not stored refs pending

The Ca II infrared triplet's performance as an activity indicator compared to Ca II H and K

2), (2) LESIA, A. Hempelmann (1), B. Fuhrmeister (1), J. H. M. M. Schmitt (1) ((1) Hamburger Sternwarte, J. Martin (1), J. N. Gonz\'alez-P\'erez (1), M. Mittag (1), Observatoire de Paris), T. O. B. Schmidt (1, Universit\"at Hamburg

arxiv:1708.04895 v1 · 2017-08-16 · 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{YXEJGPQKYIZMHU4EW4NKK3ZEX2}

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	2026-05-18T00:34:46.441605Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c5c8933e0ac232c3d384b71aa56f24bea4055991cd8959678a6ffb092ecb5902

Aliases

arxiv: 1708.04895 · arxiv_version: 1708.04895v1 · doi: 10.48550/arxiv.1708.04895 · pith_short_12: YXEJGPQKYIZM · pith_short_16: YXEJGPQKYIZMHU4E · pith_short_8: YXEJGPQK

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/YXEJGPQKYIZMHU4EW4NKK3ZEX2 \
  | 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: c5c8933e0ac232c3d384b71aa56f24bea4055991cd8959678a6ffb092ecb5902

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f74aa64f704b2bee9d635eeb90bde4f83228eaf3a27deb378033f6a97b7555ad",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2017-08-16T13:55:30Z",
    "title_canon_sha256": "6777674d25b6c5d783cb9d4a2f6c0eb14fd4812d3777ef4e5ca254968398afa7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1708.04895",
    "kind": "arxiv",
    "version": 1
  }
}