Pith Number

pith:UE5TX6PG

pith:2010:UE5TX6PGPU2IELHCDP4W7YPTHM

not attested not anchored not stored refs pending

An extensive optical study of V2491 Cyg (Nova Cyg 2008 N.2), from maximum brightness to return to quiescence

A. Siviero, G. Cherini, L. Tomasella, P. Valisa, S. Dallaporta, U. Munari

arxiv:1009.0822 v1 · 2010-09-04 · 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{UE5TX6PGPU2IELHCDP4W7YPTHM}

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	2026-05-18T02:05:36.908216Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a13b3bf9e67d34822ce21bf96fe1f33b1727fde9cc81fe8700c2d61eee151801

Aliases

arxiv: 1009.0822 · arxiv_version: 1009.0822v1 · doi: 10.48550/arxiv.1009.0822 · pith_short_12: UE5TX6PGPU2I · pith_short_16: UE5TX6PGPU2IELHC · pith_short_8: UE5TX6PG

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/UE5TX6PGPU2IELHCDP4W7YPTHM \
  | 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: a13b3bf9e67d34822ce21bf96fe1f33b1727fde9cc81fe8700c2d61eee151801

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bf95b957821ad13e5513a9d7546b451fcae168000ed4465a4d9cafbcf9010179",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2010-09-04T10:44:06Z",
    "title_canon_sha256": "6ab3ab82f444db7adfc4f37726ff390828096dd331fa9b8d4c9b14d410029cb0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1009.0822",
    "kind": "arxiv",
    "version": 1
  }
}