Pith Number

pith:SCCVC2KS

pith:2009:SCCVC2KSVOEFJ2X6OAMPFUPDGU

not attested not anchored not stored refs pending

X-ray spectral variability in the ultraluminous X-ray source Holmberg IX X-1

C. Done, K. Vierdayanti, S. Mineshige, T. R. Roberts

arxiv:0912.2906 v1 · 2009-12-15 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SCCVC2KSVOEFJ2X6OAMPFUPDGU}

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	2026-05-18T02:10:23.445585Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9085516952ab8854eafe7018f2d1e3353b39ee007070ede28b287c9ea18ab4ad

Aliases

arxiv: 0912.2906 · arxiv_version: 0912.2906v1 · doi: 10.48550/arxiv.0912.2906 · pith_short_12: SCCVC2KSVOEF · pith_short_16: SCCVC2KSVOEFJ2X6 · pith_short_8: SCCVC2KS

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/SCCVC2KSVOEFJ2X6OAMPFUPDGU \
  | 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: 9085516952ab8854eafe7018f2d1e3353b39ee007070ede28b287c9ea18ab4ad

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "216fbbd1c7d0efafeaef33f3c1dfdf2d9a7a7eeae4105efb24bf42af45b634c3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-12-15T14:27:43Z",
    "title_canon_sha256": "fe7789b26b9eac173ab2198fb166a81f937b641ba3d0e104f09ef2ba7d57de97"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.2906",
    "kind": "arxiv",
    "version": 1
  }
}