Pith Number

pith:FRNFDAQP

pith:2020:FRNFDAQPNJTAAGOOBOIQNYT26R

not attested not anchored not stored refs pending

Using quasar X-ray and UV flux measurements to constrain cosmological model parameters

Bharat Ratra, Narayan Khadka

arxiv:2004.09979 v3 · 2020-04-18 · astro-ph.CO · gr-qc · hep-ph · hep-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FRNFDAQPNJTAAGOOBOIQNYT26R}

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

2 papers in Pith

Redshift-Dependent Intrinsic Dispersion in the Quasar UV/X-ray Luminosity Relation

Deep Learning Calibration of the Quasar X-ray/UV Luminosity Relation for Cosmological Applications

Receipt and verification

First computed	2026-07-05T01:22:01.551859Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2c5a51820f6a660019ce0b9106e27af46eb5a0b2791f8f0adac465eb138a28ec

Aliases

arxiv: 2004.09979 · arxiv_version: 2004.09979v3 · doi: 10.48550/arxiv.2004.09979 · pith_short_12: FRNFDAQPNJTA · pith_short_16: FRNFDAQPNJTAAGOO · pith_short_8: FRNFDAQP

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/FRNFDAQPNJTAAGOOBOIQNYT26R \
  | 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: 2c5a51820f6a660019ce0b9106e27af46eb5a0b2791f8f0adac465eb138a28ec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1cb3c6387b6415c19ddb08a8e46be581c26e09ce270541b0bf84585d2bdcc739",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-ph",
      "hep-th"
    ],
    "license": "http://creativecommons.org/publicdomain/zero/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2020-04-18T21:07:28Z",
    "title_canon_sha256": "83bafdf1e6f4aa91bf9d14dd3dd94317706714b749a3f460064f4f638524d4b1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2004.09979",
    "kind": "arxiv",
    "version": 3
  }
}