Pith Number

pith:VPILT5KG

pith:2026:VPILT5KG4DBI4E35RUFLQDKDU2

not attested not anchored not stored refs pending

On the stellar parameter dependence of the combined Fe I and Fe II chromospheric emission-line in the wings of the Ca II K line

Dennis Jack, Faiber Rosas-Portilla, Klaus-Peter Schr\"oder, Luis Zapata, Robert Stencel, Sandra Gonz\'alez-Enr\'iquez

arxiv:2606.21808 v1 · 2026-06-20 · 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{VPILT5KG4DBI4E35RUFLQDKDU2}

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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	2026-06-23T01:13:23.346138Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

abd0b9f546e0c28e137d8d0ab80d43a6bc4f04679f3aa56a54698c5c73151ed4

Aliases

arxiv: 2606.21808 · arxiv_version: 2606.21808v1 · doi: 10.48550/arxiv.2606.21808 · pith_short_12: VPILT5KG4DBI · pith_short_16: VPILT5KG4DBI4E35 · pith_short_8: VPILT5KG

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/VPILT5KG4DBI4E35RUFLQDKDU2 \
  | 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: abd0b9f546e0c28e137d8d0ab80d43a6bc4f04679f3aa56a54698c5c73151ed4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ac6d3884bea4459a1e4913b399bc8580c4086ccb4a2b8b12e2e703fd9e917861",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2026-06-20T00:05:14Z",
    "title_canon_sha256": "8914bc9432117c1126491e43ce62ba884656f208158ffc7f17036b938867a365"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.21808",
    "kind": "arxiv",
    "version": 1
  }
}