Pith Number

pith:E34G2PS2

pith:2008:E34G2PS24FXKSQZ2WZ6VGKWZP4

not attested not anchored not stored refs pending

The very short supersoft X-ray state of the classical nova M31N 2007-11a

D. H. Hartmann, F. Haberl, G. G. Williams, G. Sala, J. Greiner, M. Della Valle, M. Henze, M. Hernanz, M. J. Freyberg, P. Milne, V. Burwitz, W. Pietsch

arxiv:0812.4420 v2 · 2008-12-23 · astro-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{E34G2PS24FXKSQZ2WZ6VGKWZP4}

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	2026-05-18T02:15:03.917088Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

26f86d3e5ae16ea9433ab67d532ad97f3d9fffa1c592bda39a36369e769bc079

Aliases

arxiv: 0812.4420 · arxiv_version: 0812.4420v2 · doi: 10.48550/arxiv.0812.4420 · pith_short_12: E34G2PS24FXK · pith_short_16: E34G2PS24FXKSQZ2 · pith_short_8: E34G2PS2

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/E34G2PS24FXKSQZ2WZ6VGKWZP4 \
  | 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: 26f86d3e5ae16ea9433ab67d532ad97f3d9fffa1c592bda39a36369e769bc079

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9e825188a3d9284d7c0af6c7f9f00486d12264bafd95507a9a92d083a054312c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-12-23T16:25:44Z",
    "title_canon_sha256": "f2462ef0ff868b2849c9f2e060fdce2b6516ceffd0a94a905be31da1c8a6d953"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0812.4420",
    "kind": "arxiv",
    "version": 2
  }
}