Pith Number

pith:ZXXFQIOZ

pith:2013:ZXXFQIOZK6FWII6W7J4NHVSXTD

not attested not anchored not stored refs pending

Spectral state evolution of 4U~1820-30: the stability of the spectral index of Comptonization tail

Elena Seifina (GAISH/MSU), Filippo Frontera (University of Ferrara, George Mason University, Italy, Italy), Lev Titarchuk (University of Ferrara, NASA/GSFC, USA)

arxiv:1303.4323 v1 · 2013-03-18 · 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{ZXXFQIOZK6FWII6W7J4NHVSXTD}

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.

Cited by

1 paper in Pith

The first IXPE view of the eclipsing ADC source 4U 1822-37

Receipt and verification

First computed	2026-05-18T01:51:01.155156Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cdee5821d9578b6423d6fa78d3d65798c39d69ce41d012416e8ad9e3be64cf68

Aliases

arxiv: 1303.4323 · arxiv_version: 1303.4323v1 · doi: 10.48550/arxiv.1303.4323 · pith_short_12: ZXXFQIOZK6FW · pith_short_16: ZXXFQIOZK6FWII6W · pith_short_8: ZXXFQIOZ

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/ZXXFQIOZK6FWII6W7J4NHVSXTD \
  | 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: cdee5821d9578b6423d6fa78d3d65798c39d69ce41d012416e8ad9e3be64cf68

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d020bd01d261a1e15a3450c5c59ce16175773ee448e60c09f273e4f5276eb916",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2013-03-18T17:19:38Z",
    "title_canon_sha256": "5e830a6504d4682a50c1f0488e4beecb10e93e73b25b9e98a3b177985b94e92f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.4323",
    "kind": "arxiv",
    "version": 1
  }
}