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  "title": "LRDW J041730.25-114753.4 — Cerin Amroth",
  "description": "LRDW J041730.25-114753.4: a TENTATIVE object in the LRD Watch DR1 catalog, in MACS J0417.5-1154, with images in NIRCam bands, its spectral energy distribution, vetting, redshifts and literature matches.",
  "date_modified": "2026-10-17",
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    {
      "text": "Home",
      "url": "https://cerinamroth.com/"
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    {
      "text": "JWST",
      "url": "https://cerinamroth.com/jwst/"
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    {
      "text": "Little red dots",
      "url": "https://cerinamroth.com/jwst/lrds/"
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    {
      "text": "LRD Watch DR1",
      "url": "https://cerinamroth.com/jwst/lrds/dr1/"
    },
    {
      "text": "SIMBAD within 2″",
      "url": "https://simbad.cds.unistra.fr/simbad/sim-coo?Coord=64.376045+-11.798186&Radius=2&Radius.unit=arcsec"
    },
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      "text": "ESASky",
      "url": "https://sky.esa.int/esasky/?target=64.376045%20-11.798186&fov=0.02&sci=true"
    },
    {
      "text": "About the release",
      "url": "https://cerinamroth.com/jwst/lrds/dr1/"
    },
    {
      "text": "← LRDW J041728.80-115120.6",
      "url": "https://cerinamroth.com/jwst/lrds/dr1/j041728.80-115120.6/"
    },
    {
      "text": "LRDW J041731.46-115008.8 →",
      "url": "https://cerinamroth.com/jwst/lrds/dr1/j041731.46-115008.8/"
    }
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      "description": "LRDW J041730.25-114753.4: a TENTATIVE object in the LRD Watch DR1 catalog, in MACS J0417.5-1154, with images in NIRCam bands, its spectral energy distribution, vetting, redshifts and literature matches.",
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  "content_markdown": "[Home](https://cerinamroth.com/) › [JWST](https://cerinamroth.com/jwst/) › [Little red dots](https://cerinamroth.com/jwst/lrds/) › [LRD Watch DR1](https://cerinamroth.com/jwst/lrds/dr1/) › LRDW J041730.25-114753.4  \n\n \n\nLRD Watch DR1 · catalog object\n\n \n\n# LRDW J041730.25-114753.4\n\n \n\ncatalogTENTATIVEBH* channelMACS J0417.5-1154\n\n \n\n \n\n \n\nRA 04:17:30.251 64.3760449°\n\n \n\nDec −11:47:53.47 -11.7981862°\n\n \n\n[SIMBAD within 2″](https://simbad.cds.unistra.fr/simbad/sim-coo?Coord=64.376045+-11.798186&Radius=2&Radius.unit=arcsec) · [ESASky](https://sky.esa.int/esasky/?target=64.376045%20-11.798186&fov=0.02&sci=true)\n\n \n\n  \n\n \n\n## Images\n\n \n\n F090W image, 3.2 arcsec across, north up \n\nF090W0.03″ px\n\n F115W image, 3.2 arcsec across, north up \n\nF115W0.03″ px\n\n F150W image, 3.2 arcsec across, north up \n\nF150W0.03″ px\n\n F277W image, 3.2 arcsec across, north up \n\nF277W0.06″ px\n\n F410M image, 3.2 arcsec across, north up \n\nF410M0.06″ px\n\n F444W image, 3.2 arcsec across, north up \n\nF444W0.06″ px\n\n \n\n3.2″ across, north up, east left, resampled from the deepest mosaic covering the object in each band; ticks mark the catalogue position. Each band is stretched on its own noise; the composite shares one flux scale, so its colour is real. No coverage in F200W, F356W.\n\n \n\n \n\n \n\n  \n\n## Spectral energy distribution\n\n  \n- NIRCam wide\n- NIRCam medium\n- 2σ upper limit (S/N < 2)\n\n Aperture fluxes in a 0.16″-radius circle, not corrected to total; the values are in the photometry table below. The gold line marks the Balmer limit (3646 Å rest) at z = 5.621.  \n\n \n\n## At a glance\n\n \n\nTierTENTATIVE \n\nFound byBH* channel\n\nRedshift5.621 DJA grade 3, PRISM\n\nSpectral shapeinconclusive de Graaff+25 criteria\n\nF444W27.28 AB S/N 35, 0.16″ aperture\n\nF277W − F444Wnot in the colour lane\n\nBH* share0.80 bhs_bb4800_b4; Δχ² galaxy 0.2, dwarf 24.3\n\nCompactnessgrowth ratio 2.356 stars 2.354\n\nBalmer break1.29 (lower limit) F277W/F210M, blue:2sig-limit\n\nImage vettinghalf-stack pass; no flags raised\n\nLiterature1 catalogue(s), 0 AGN paper(s) within 0.041″\n\n \n\n \n\n \n\n \n\n \n\n## Vetting\n\n \n- Image vettingnot applicable\n- Half-stack testpass\n- Artifact risknone\n- Neighbournone\n- Extendedno\n\n \n- BH* channelevidence dchi2_gal=0.2 dchi2_bd=24.3\n\n \n\n \n\n \n\n## Redshifts\n\n \n\nEach redshift keeps its own column. Photometric redshifts of little red dots are unreliable: against spectra, about a third of AGN-template redshifts (`z_agn`; 31 of 95 in the last purity run) and about half of galaxy-template redshifts at z > 3 were catastrophic outliers (methods Section 8).\n\n \n\n | Column | What it is | z | Source\n | `z_spec` | Spectroscopic, DJA grade 3 | 5.6213 | macs0417-v4_prism-clear_1208_205006.spec.fits\n | `z_vet` | Adopted by vetting | 5.6213 | zspec:dja_specz_grade3.csv:205006\n | `z_phot` | Photometric (P(z) peak) | — | not fitted\n | `z_bhs` | BH* channel fit | 5.714 | bhs_bb4800_b4\n | `z_agn` | Colour-lane fit | — | —\n\n \n\n \n\n \n\n \n\n \n\n## Spectral checks\n\n \n\nV-shape (spectrum)inconclusive\n\nStar (spectrum)no\n\nV-shape (photometry)not measurable βUV not measured, βopt not measured at z_agn\n\nLine in F410Mnone 4 line-free optical band(s)\n\nLine-ambiguousno\n\nSettling verdictnot evaluated\n\n \n\n \n\n \n\n## Literature\n\n \n\nPublished objects within 1″ of this position. A match is a positional recovery, not an adopted classification.\n\n \n- de Graaff et al. (2025)\n\n \n\n \n\n \n\n \n\n \n\n## Photometry\n\n \n\nCircular aperture of radius 0.16″ at each band's native resolution, background from a 0.40–0.65″ annulus, programmes combined by inverse variance. For a point source multiply by the field's aperture correction (r = 0.16″ → 0.70″). Grey rows are below S/N 2.\n\n \n\n | Band | Instrument | Pivot (µm) | f (nJy) | σ (nJy) | AB mag | S/N | Ap. corr.\n | F090W | NIRCam wide | 0.902 | 3.90 | 2.75 | 29.92 | 1.4 | 1.41–1.43\n | F115W | NIRCam wide | 1.154 | 0.36 | 2.93 | 32.52 | 0.1 | 1.39–1.41\n | F140M | NIRCam medium | 1.405 | 4.12 | 6.04 | 29.86 | 0.7 | 1.40–1.41\n | F150W | NIRCam wide | 1.501 | 4.33 | 2.20 | 29.81 | 2.0 | 1.40–1.40\n | F162M | NIRCam medium | 1.627 | 17.54 | 6.53 | 28.29 | 2.7 | 1.37–1.38\n | F182M | NIRCam medium | 1.845 | −0.54 | 2.88 | — | −0.2 | 1.40–1.42\n | F210M | NIRCam medium | 2.095 | 2.06 | 3.73 | 30.62 | 0.6 | 1.42–1.42\n | F250M | NIRCam medium | 2.504 | 5.01 | 3.64 | 29.65 | 1.4 | 1.47–1.48\n | F277W | NIRCam wide | 2.762 | 9.62 | 1.08 | 28.94 | 8.9 | 1.51–1.52\n | F300M | NIRCam medium | 2.990 | 11.07 | 2.62 | 28.79 | 4.2 | 1.52–1.53\n | F335M | NIRCam medium | 3.362 | 26.92 | 1.72 | 27.82 | 15.6 | 1.55–1.55\n | F360M | NIRCam medium | 3.624 | 17.07 | 1.65 | 28.32 | 10.3 | 1.57–1.58\n | F410M | NIRCam medium | 4.082 | 27.35 | 1.66 | 27.81 | 16.5 | 1.60–1.60\n | F444W | NIRCam wide | 4.404 | 44.61 | 1.28 | 27.28 | 34.8 | 1.61–1.64\n\n \n\n \n\n \n\n## Provenance\n\n \n\n FieldMACS J0417.5-1154 (`macsj04175,mj04175x`) Programmes`01208, 06882` behind every mosaic the field measured Pipeline rows merged2 all at one position Detection passoriginal Release build`33af9933d1cc` 2026-10-17T14:29:44Z \n\n \n\n## Image sources\n\n | Band | Mosaic | Native pixel | Coverage\n | F090W | `jw01208-o026_t003_nircam_clear-f090w_i2d.fits` | 0.031″ | 0.89\n | F115W | `jw01208-o026_t003_nircam_clear-f115w_i2d.fits` | 0.031″ | 0.78\n | F150W | `jw01208-o026_t003_nircam_clear-f150w_i2d.fits` | 0.031″ | 0.88\n | F277W | `jw01208-o026_t003_nircam_clear-f277w_i2d.fits` | 0.063″ | 1.00\n | F410M | `jw01208-o026_t003_nircam_clear-f410m_i2d.fits` | 0.063″ | 1.00\n | F444W | `jw01208-o026_t003_nircam_clear-f444w_i2d.fits` | 0.063″ | 1.00\n\n \n\n \n\n \n\n## Cite\n\n \n\nAnderson, Jordan (2026). LRD Watch DR1: little red dot candidates from an independent search of public JWST imaging (Version DR1) [Data set]. Cerin Amroth Research. Zenodo. https://doi.org/10.5281/zenodo.23062632 Object LRDW J041730.25-114753.4.\n\n \n\nCC BY 4.0. Please also acknowledge the JWST programmes that took the data. LRD Watch DR1 is a vetted candidate catalogue, not a complete census: it has no selection function and cannot on its own give number densities. [About the release](https://cerinamroth.com/jwst/lrds/dr1/).\n\n \n\n [← LRDW J041728.80-115120.6](https://cerinamroth.com/jwst/lrds/dr1/j041728.80-115120.6/)[LRDW J041731.46-115008.8 →](https://cerinamroth.com/jwst/lrds/dr1/j041731.46-115008.8/)\n",
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