Pith Number

pith:APXTLVY3

pith:2016:APXTLVY3TJPFO6ERWHLOUDC3QR

not attested not anchored not stored refs pending

Short term X-ray spectral variability of the quasar PDS 456 observed in a low flux state

Emanuele Nardini, Francesco Tombesi, Gabriele A. Matzeu, James N. Reeves, Jason Gofford, Michele T Costa, Valentina Braito

arxiv:1602.04023 v1 · 2016-02-12 · 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{APXTLVY3TJPFO6ERWHLOUDC3QR}

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	2026-05-18T01:20:07.962996Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

03ef35d71b9a5e577891b1d6ea0c5b8467a671fd3c0142480f71a056f0a82bb3

Aliases

arxiv: 1602.04023 · arxiv_version: 1602.04023v1 · doi: 10.48550/arxiv.1602.04023 · pith_short_12: APXTLVY3TJPF · pith_short_16: APXTLVY3TJPFO6ER · pith_short_8: APXTLVY3

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/APXTLVY3TJPFO6ERWHLOUDC3QR \
  | 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: 03ef35d71b9a5e577891b1d6ea0c5b8467a671fd3c0142480f71a056f0a82bb3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1c32e5e0b68f19088f076457cfaf9614d8540de67d22a5a82e3e40c7ef2e0ee8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2016-02-12T12:00:09Z",
    "title_canon_sha256": "9cd0a7b4ed5a92aeefb3185a11350866564dff86660f3478e91f03842bc661d0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.04023",
    "kind": "arxiv",
    "version": 1
  }
}