Pith Number

pith:ZTNYQA7O

pith:2009:ZTNYQA7OTLYSW75WVI6F2BCHLK

not attested not anchored not stored refs pending

The spectroscopic evolution of the symbiotic star AG Draconis. I.The O VI Raman, Balmer, and helium emission line variations during the outburst of 2006-2008

A. Skopal, G. M. Wahlgren, K. Genovali, M. \v{S}lechta, M. Wolf, P. Koubsky, P. \v{S}koda, S. Bernabei, S. N. Shore

arxiv:0912.1890 v1 · 2009-12-10 · 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{ZTNYQA7OTLYSW75WVI6F2BCHLK}

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	2026-05-18T02:10:25.039222Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ccdb8803ee9af12b7fb6aa3c5d04475a8e83dc6826d06086add3b6916c8d3a05

Aliases

arxiv: 0912.1890 · arxiv_version: 0912.1890v1 · doi: 10.48550/arxiv.0912.1890 · pith_short_12: ZTNYQA7OTLYS · pith_short_16: ZTNYQA7OTLYSW75W · pith_short_8: ZTNYQA7O

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/ZTNYQA7OTLYSW75WVI6F2BCHLK \
  | 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: ccdb8803ee9af12b7fb6aa3c5d04475a8e83dc6826d06086add3b6916c8d3a05

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cd1d28f0d129740b3beb57179bd97d2ba59a28ae55592d11e62794090657e8b9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-12-10T00:03:47Z",
    "title_canon_sha256": "8d7e5666db6972bd948773f1188d40e3b396b6e241b207dcf50930b7730f2c96"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.1890",
    "kind": "arxiv",
    "version": 1
  }
}