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  "title": "LRDW J123647.37+621038.0 — Cerin Amroth",
  "description": "LRDW J123647.37+621038.0: a TENTATIVE object in the LRD Watch DR1 catalog, in GOODS-N (JADES 1181 with FRESCO, CONGRESS, GO 4762 and GO 6434), 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=189.197408++62.177241&Radius=2&Radius.unit=arcsec"
    },
    {
      "text": "ESASky",
      "url": "https://sky.esa.int/esasky/?target=189.197408%20+62.177241&fov=0.02&sci=true"
    },
    {
      "text": "About the release",
      "url": "https://cerinamroth.com/jwst/lrds/dr1/"
    },
    {
      "text": "← LRDW J123638.84+621503.8",
      "url": "https://cerinamroth.com/jwst/lrds/dr1/j123638.84+621503.8/"
    },
    {
      "text": "LRDW J123647.45+621525.0 →",
      "url": "https://cerinamroth.com/jwst/lrds/dr1/j123647.45+621525.0/"
    }
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      "name": "LRDW J123647.37+621038.0",
      "description": "LRDW J123647.37+621038.0: a TENTATIVE object in the LRD Watch DR1 catalog, in GOODS-N (JADES 1181 with FRESCO, CONGRESS, GO 4762 and GO 6434), 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 J123647.37+621038.0  \n\n \n\nLRD Watch DR1 · catalog object\n\n \n\n# LRDW J123647.37+621038.0\n\n \n\ncatalogTENTATIVEBH* channelGOODS-N (JADES 1181 with FRESCO, CONGRESS, GO 4762 and GO 6434)\n\n \n\n \n\n \n\nRA 12:36:47.378 189.1974084°\n\n \n\nDec +62:10:38.07 62.1772411°\n\n \n\n[SIMBAD within 2″](https://simbad.cds.unistra.fr/simbad/sim-coo?Coord=189.197408++62.177241&Radius=2&Radius.unit=arcsec) · [ESASky](https://sky.esa.int/esasky/?target=189.197408%20+62.177241&fov=0.02&sci=true)\n\n \n\n  \n\n \n\n## Images\n\n \n\n F115W image, 3.2 arcsec across, north up \n\nF115W0.03″ px\n\n F356W image, 3.2 arcsec across, north up \n\nF356W0.06″ 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 F090W, F150W, F200W, F277W, F410M.\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 = 4.131.  \n\n \n\n## At a glance\n\n \n\nTierTENTATIVE \n\nFound byBH* channel\n\nRedshift4.131 DJA grade 3, PRISM\n\nSpectral shapeV-shaped de Graaff+25 criteria\n\nF444W25.60 AB S/N 39, 0.16″ aperture\n\nF277W − F444Wnot in the colour lane\n\nBH* share0.64 bhs_bb5400_b8; Δχ² galaxy 2.2, dwarf 17.5\n\nCompactnessgrowth ratio 1.721 stars 2.357\n\nBalmer break1.43 ± 0.25 F210M/F115W, blue:far-uv\n\nImage vettinghalf-stack pass; no flags raised\n\nLiterature4 catalogue(s), 7 AGN paper(s) within 0.034″\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=2.2 dchi2_bd=17.5\n- BH* channelBH* share 0.64 below 0.8 (composite)\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 | 4.1309 | jades-gdn09-v4_prism-clear_1181_73488.spec.fits\n | `z_vet` | Adopted by vetting | 4.1309 | zspec:dja:jades-gdn09-v4_prism-clear_1181_73488.spec.fits (pipeline z_vet 4.133 from zspec:vizier_J_A+A_691_A240_jadesgnp.csv:10395)\n | `z_phot` | Photometric (P(z) peak) | — | not fitted\n | `z_bhs` | BH* channel fit | 4.729 | bhs_bb5400_b8\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)V-shaped\n\nStar (spectrum)no\n\nV-shape (photometry)not measurable βUV not measured, βopt not measured at z_agn\n\nLine in F410Mnone 0 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- Barro et al. (2025)\n- de Graaff et al. (2025)\n- Matthee et al. (2026)\n- Rinaldi et al. (2024)\n- Baccus+2026 (DJA census) broad-line AGN\n- Juodzbalis+2026 (JADES census) broad-line AGN\n- Maiolino+2024 broad-line AGN\n- Maiolino+2025 (X-ray weak) broad-line AGN\n- Rusakov+2026 broad-line AGN\n- Scholtz+2026 (LRD/LBD BLR) broad-line AGN\n- Yanagisawa+2026 (ATLAS I) broad-line AGN\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 | F115W | NIRCam wide | 1.154 | 36.48 | 5.17 | 27.50 | 7.1 | 1.33\n | F182M | NIRCam medium | 1.845 | 40.46 | 4.53 | 27.38 | 8.9 | 1.35–1.44\n | F210M | NIRCam medium | 2.095 | 52.09 | 5.61 | 27.11 | 9.3 | 1.37–1.46\n | F356W | NIRCam wide | 3.568 | 239.93 | 4.08 | 25.45 | 58.9 | 1.31–1.52\n | F444W | NIRCam wide | 4.404 | 208.01 | 5.32 | 25.61 | 39.1 | 1.51–1.58\n\n \n\n \n\n \n\n## Provenance\n\n \n\n FieldGOODS-N (JADES 1181 with FRESCO, CONGRESS, GO 4762 and GO 6434) (`goods`) Programmes`01181, 01895, 02674, 02926, 03577, 04762, 05407, 06434` behind every mosaic the field measured Pipeline rows merged1 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 | F115W | `jw03577-o002_t002_nircam_clear-f115w_i2d.fits` | 0.031″ | 1.00\n | F356W | `jw03577-o002_t002_nircam_clear-f356w_i2d.fits` | 0.063″ | 1.00\n | F444W | `jw01895-o002_t004_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 J123647.37+621038.0.\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 J123638.84+621503.8](https://cerinamroth.com/jwst/lrds/dr1/j123638.84+621503.8/)[LRDW J123647.45+621525.0 →](https://cerinamroth.com/jwst/lrds/dr1/j123647.45+621525.0/)\n",
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