Pith Number

pith:V5LFEY7E

pith:2019:V5LFEY7EZLMDLIVBDZU43ORUHX

not attested not anchored not stored refs pending

The First NuSTAR Observation of 4U 1538-522: Updated Orbital Ephemeris and A Strengthened Case for an Evolving Cyclotron Line Energy

(2) UCSD Center for Astrophysics, (3) UMBC Center for Space Sciences, 4), (4) NASA Goddard Spaceflight Center, (5) European Space Astronomy Centre, (6) Dr. Karl-Remeis-Sternwarte & Erlangen Centre for Astroparticle Physics, (7) Institut f\"ur Astronomie und Astrophysik, (8) Space Science Division, Diana M. Cheatham (3, Felix F\"urst (5), J\"orn Wilms (6), Katja Pottschmidt (3, Matthias K\"uhnel (6), Michael T. Wolff (8) ((1) MIT Kavli Institute, Naval Research Laboratory), Paul B. Hemphill (1), Peter Kretschmar (5), Richard E. Rothschild (2), R\"udiger Staubert (7), Space Science, Technology, Universit\"at T\"ubingen

arxiv:1901.11071 v1 · 2019-01-30 · 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{V5LFEY7EZLMDLIVBDZU43ORUHX}

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	2026-05-17T23:51:30.101161Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

af565263e4cad835a2a11e69cdba343de2aae5402d4d94019bdfbda9b8c175db

Aliases

arxiv: 1901.11071 · arxiv_version: 1901.11071v1 · doi: 10.48550/arxiv.1901.11071 · pith_short_12: V5LFEY7EZLMD · pith_short_16: V5LFEY7EZLMDLIVB · pith_short_8: V5LFEY7E

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/V5LFEY7EZLMDLIVBDZU43ORUHX \
  | 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: af565263e4cad835a2a11e69cdba343de2aae5402d4d94019bdfbda9b8c175db

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f1554ed5f13fb38609d7a54676ae88f9c76ca0d71424e9819028111009f67db2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2019-01-30T19:45:00Z",
    "title_canon_sha256": "66e3083d695bf7b34bdd67c642019511f06cef147ddb2bb7b204d350efb4994e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.11071",
    "kind": "arxiv",
    "version": 1
  }
}