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  "title": "LRDW J024011.46-013705.2 — Cerin Amroth",
  "description": "LRDW J024011.46-013705.2: a SILVER object in the LRD Watch DR1 candidate table, in Abell 370, 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",
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      "text": "Little red dots",
      "url": "https://cerinamroth.com/jwst/lrds/"
    },
    {
      "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=40.047757+-1.618125&Radius=2&Radius.unit=arcsec"
    },
    {
      "text": "ESASky",
      "url": "https://sky.esa.int/esasky/?target=40.047757%20-1.618125&fov=0.02&sci=true"
    },
    {
      "text": "About the release",
      "url": "https://cerinamroth.com/jwst/lrds/dr1/"
    },
    {
      "text": "← LRDW J024005.49-014236.9",
      "url": "https://cerinamroth.com/jwst/lrds/dr1/j024005.49-014236.9/"
    },
    {
      "text": "LRDW J024014.33-013907.6 →",
      "url": "https://cerinamroth.com/jwst/lrds/dr1/j024014.33-013907.6/"
    }
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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 J024011.46-013705.2  \n\n \n\nLRD Watch DR1 · candidate\n\n \n\n# LRDW J024011.46-013705.2\n\n \n\ncandidate tableSILVERmain classBH* channelcolour laneAbell 370\n\n \n\n \n\n \n\nRA 02:40:11.462 40.0477567°\n\n \n\nDec −01:37:05.25 -1.6181250°\n\n \n\n[SIMBAD within 2″](https://simbad.cds.unistra.fr/simbad/sim-coo?Coord=40.047757+-1.618125&Radius=2&Radius.unit=arcsec) · [ESASky](https://sky.esa.int/esasky/?target=40.047757%20-1.618125&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 = 6.460.  \n\n \n\n## At a glance\n\n \n\nTierSILVER main class\n\nFound byBH* channel + colour lane\n\nRedshift6.46 colour-lane fit\n\nSpectral shapeno labelled spectrum\n\nF444W27.02 AB S/N 44, 0.16″ aperture\n\nF277W − F444W1.46 mag strict redness\n\nBH* share0.82 bhs_bb5400_b8; Δχ² galaxy 27.2, dwarf 11.8\n\nCompactnessgrowth ratio 1.936 stars 2.384\n\nBalmer break2.96 (lower limit) F300M/F250M, blue:2sig-limit\n\nImage vettinghalf-stack pass; no flags raised\n\nLiteratureno published match within 1″\n\n \n\n \n\n \n\n \n\n \n\n## Vetting\n\n \n- Image vettingpassed\n- Half-stack testpass\n- Artifact risknone\n- Neighbournone\n- Extendedno\n\n \n- No vetting notes.\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 | — | —\n | `z_vet` | Adopted by vetting | 6.4600 | z_agn\n | `z_phot` | Photometric (P(z) peak) | — | not fitted\n | `z_bhs` | BH* channel fit | 6.413 | bhs_bb5400_b8\n | `z_agn` | Colour-lane fit | 6.46 | AGN-inclusive templates\n\n \n\n \n\n \n\n \n\n \n\n## Spectral checks\n\n \n\nV-shape (spectrum)no labelled spectrum\n\nStar (spectrum)no spectrum\n\nV-shape (photometry)passes βUV −1.72, βopt 0.79 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- No published JWST little red dot or broad-line AGN within 1″.\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 | F070W | NIRCam wide | 0.704 | −2.48 | 3.24 | — | −0.8 | 1.30\n | F090W | NIRCam wide | 0.902 | 4.01 | 2.18 | 29.89 | 1.8 | 1.31\n | F115W | NIRCam wide | 1.154 | 9.83 | 2.18 | 28.92 | 4.5 | 1.33\n | F140M | NIRCam medium | 1.405 | 11.49 | 4.12 | 28.75 | 2.8 | 1.32\n | F150W | NIRCam wide | 1.501 | 10.20 | 1.86 | 28.88 | 5.5 | 1.34\n | F162M | NIRCam medium | 1.627 | 13.11 | 4.09 | 28.61 | 3.2 | 1.32\n | F164N | NIRCam wide | 1.645 | −14.89 | 25.87 | — | −0.6 | 1.27\n | F182M | NIRCam medium | 1.845 | 10.64 | 2.43 | 28.83 | 4.4 | 1.35\n | F187N | NIRCam wide | 1.874 | 50.97 | 25.84 | 27.13 | 2.0 | 1.23\n | F210M | NIRCam medium | 2.095 | 9.38 | 2.75 | 28.97 | 3.4 | 1.36\n | F250M | NIRCam medium | 2.504 | 4.94 | 3.36 | 29.67 | 1.5 | 1.44\n | F277W | NIRCam wide | 2.762 | 14.79 | 1.04 | 28.48 | 14.3 | 1.47\n | F300M | NIRCam medium | 2.990 | 19.48 | 2.17 | 28.18 | 9.0 | 1.46\n | F335M | NIRCam medium | 3.362 | 20.86 | 1.59 | 28.10 | 13.1 | 1.49\n | F360M | NIRCam medium | 3.624 | 59.10 | 1.64 | 26.97 | 36.0 | 1.50\n | F410M | NIRCam medium | 4.082 | 28.92 | 1.84 | 27.75 | 15.7 | 1.53\n | F430M | NIRCam medium | 4.281 | 35.31 | 3.35 | 27.53 | 10.6 | 1.53\n | F444W | NIRCam wide | 4.404 | 56.71 | 1.28 | 27.02 | 44.3 | 1.58\n | F460M | NIRCam medium | 4.630 | 43.77 | 4.17 | 27.30 | 10.5 | 1.56\n | F480M | NIRCam medium | 4.816 | 121.60 | 3.78 | 26.19 | 32.1 | 1.57\n\n \n\n \n\n \n\n## Provenance\n\n \n\n FieldAbell 370 (`a370x`) Programmes`01208, 03362, 06882` behind every mosaic the field measured Pipeline rows merged3 all at one position Detection pass2026-09 re-detection Release build`33af9933d1cc` 2026-10-17T14:29:44Z \n\n \n\n## Image sources\n\n | Band | Mosaic | Native pixel | Coverage\n | F090W | `jw01208-o020_t001_nircam_clear-f090w_i2d.fits` | 0.031″ | 1.00\n | F115W | `jw01208-o020_t001_nircam_clear-f115w_i2d.fits` | 0.031″ | 1.00\n | F150W | `jw01208-o020_t001_nircam_clear-f150w_i2d.fits` | 0.031″ | 1.00\n | F277W | `jw01208-o020_t001_nircam_clear-f277w_i2d.fits` | 0.063″ | 1.00\n | F410M | `jw01208-o020_t001_nircam_clear-f410m_i2d.fits` | 0.063″ | 1.00\n | F444W | `jw01208-o020_t001_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 J024011.46-013705.2.\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 J024005.49-014236.9](https://cerinamroth.com/jwst/lrds/dr1/j024005.49-014236.9/)[LRDW J024014.33-013907.6 →](https://cerinamroth.com/jwst/lrds/dr1/j024014.33-013907.6/)\n",
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