Pith Number

pith:O4I4KKVG

pith:2011:O4I4KKVGNNIKOSIOYSJR5I7GGW

not attested not anchored not stored refs pending

The spectroscopic evolution of the symbiotic-like recurrent nova V407 Cygni during its 2010 outburst. II. The circumstellar environment and the aftermath

G. M. Wahlgren (CUA, GSFC-NASA), INFN-Pisa), M. Slechta, P. Koubsky, S. N. Shore (Univ. of Pisa, Tartu Obs), T. Augusteijn (NOT), T. Liimets (NOT, V. Votruba (Ondrejov Obs.)

arxiv:1112.2247 v1 · 2011-12-10 · 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{O4I4KKVGNNIKOSIOYSJR5I7GGW}

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	2026-05-18T01:59:12.337565Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7711c52aa66b50a7490ec4931ea3e635b4e24c61d8c6d1e53f45288485319e82

Aliases

arxiv: 1112.2247 · arxiv_version: 1112.2247v1 · doi: 10.48550/arxiv.1112.2247 · pith_short_12: O4I4KKVGNNIK · pith_short_16: O4I4KKVGNNIKOSIO · pith_short_8: O4I4KKVG

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/O4I4KKVGNNIKOSIOYSJR5I7GGW \
  | 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: 7711c52aa66b50a7490ec4931ea3e635b4e24c61d8c6d1e53f45288485319e82

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2b656c7fda063e6d6cec7b15b9ac677ec601dde26308c174366c87bd64a7fdf2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2011-12-10T04:07:09Z",
    "title_canon_sha256": "612ba9244015c4defc5f21f632a64d0ccf4d38441902bc929d0745967a1c3081"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1112.2247",
    "kind": "arxiv",
    "version": 1
  }
}