COLIBRI, a wide-field 1.3 m robotic telescope dedicated to the transient sky

Basa, S.; Lee, William H.; Dolon, F.; Watson, A. M.; Floriot, Johan; Atteia, J. L.; Butler, N.; Dornic, D.; Lombardo, Simona; Ronayette, S.; Ageron, M.; Agneray, François; Ángeles, Fernando; Bautista, Ludovik; Benamar-Aissa, Hafid; Blanpain, Cyrille; Boulade, O.; Boy, Jérémie; Buat, V.; Cadena, Edgar; Cuevas, Salvador; Farah, Alejandro; Figueroa, Liliana; Fuentes, Jorge; Gaïti, Carole; Gallais, P.; Kajfasz, E.; Langarica, R.; Langlois, Arthur; Larrieu, Marie; Suu, A. Le van; Lecubin, Julien; Ángeles, Eduardo López; Lugo-Ibarra, Erica E.; Malgoyre, Adrien; Mathon, Romain; Moreau, Chrystel; Nouvel-De-La-Fleche, Alix; Ochoa, José L.; Pedrayes-López, María H.; Рамон, П.; Ruíz-Diáz-Soto, Jaime; Tinoco, S.; Valentin, Hervé

doi:10.1117/12.2627139

Cited by 3 publications

(2 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…CAGIRE is a scientific camera sensitive in the near infrared between 1.1 and 1.8 µm, located at one of the Nasmyth foci of the robotic telescope Colibrí. 2 When Colibrí receives a burst alert, it quickly points the source and CAGIRE acquires images of the sky in the NIR domain, within a square field of view of 21.7 arcmin on a side, to cover the error boxes of ECLAIRs. 4 CAGIRE acquisitions will start soon after the telescope pointing and consist of a series of short (1-2 minutes) exposures, processed right after their acquisition, in order to identify potential afterglows within 5 minutes of the reception of an alert.…”

Section: Presentation Of the Cameramentioning

confidence: 99%

“…Based on the localization of the bursts detected by ECLAIRs onboard SVOM, the ground-based robotic telescope Colibrí, operating from the Observatorio Astronómico Nacional in San Pedro Mártir, will quickly point the source and acquire images of the burst error box at near infrared (NIR) and visible wavelengths. 2 The presence of a burst appears in the images as a new unidentified star, often with rapid luminosity variations, justifying the need for a telescope able to point the source in less than 30 s. Moreover the visible camera does not allow to detect high redshift candidates (z ≥ 7.4), and the near infrared domain is needed to detect, monitor and study them. To do so, a near infrared camera, CAGIRE (CApturing Grbs InfraRed Emission), has been developed.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Flux reconstruction for the NIR camera CAGIRE at the focus of the Colibrí telescope

Flèche

Atteia

Valentin

et al. 2022

X-Ray, Optical, and Infrared Detectors for Astronomy X

Self Cite

View full text Add to dashboard Cite

CAGIRE is the near infrared camera of the Colibrí robotic telescope, designed for the follow-up of SVOM alerts, mainly Gamma Ray Bursts (GRBs), and the quick imaging of sky regions where transient sources are detected by the SVOM satellite. CAGIRE is based on the Astronomical Large Format Array (ALFA) 2k x 2k SWIR sensor from the French consortium CEA-LYNRED. In the context of CAGIRE the sensor is operated in "Up the Ramp" mode to observe the sky in a square field of view of 21.7 arcmin on a side, in the range of wavelengths from 1.1 to 1.8 µm. An observation with CAGIRE consists of a series of short (1-2 minutes) exposures during which the pixels are read out every 1.3 second, continuously accumulating charges proportionally to the received flux, building a ramp.The main challenge is to quickly process and analyse these ramps, in order to identify and study the near infrared counterparts of the bursts, within 5 minutes of the reception of an alert. Our preprocessing, which is under development, aims at providing reliable flux maps for the astronomy pipeline. It is based on a sequence of operations. First, calibration maps are used to identify saturated pixels, and for each pixel, the usable (non saturated) range of the ramp. Then, the ramps are corrected for the electronic common mode noise, and differential ramps are constructed. Finally, the flux is calculated from the differential ramps, using a previously calibrated map of pixel non-linearities. We present here the sequence of operations performed by the preprocessing, which are based on previous calibrations of the sensor response. These operations lead to the production of a flux map corrected from cosmic-rays hits, a map depicting the quality of the fit, a map of saturated pixels and a map of pixels hit by cosmic-rays, before the acquisition of the next ramp. These maps will be used by the astronomy pipeline to quickly extract the scientific results of the observations, like the identification of uncatalogued or quickly variable sources that could be GRB afterglows.

show abstract

Section: Presentation Of the Cameramentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flux reconstruction for the NIR camera CAGIRE at the focus of the Colibrí telescope

Flèche

Atteia

Valentin

et al. 2022

X-Ray, Optical, and Infrared Detectors for Astronomy X

Self Cite

View full text Add to dashboard Cite

show abstract

CAGIRE: a wide-field NIR imager for the COLIBRI 1.3 meter robotic telescope

et al. 2023

View full text Add to dashboard Cite

Understanding the nature of the optical emission in gamma-ray bursts: analysis from TAROT, COATLI, and RATIR observations

Becerra,

Klotz,

Atteia

et al. 2023

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

We collected the optical light-curve data of 227 gamma-ray bursts (GRBs) observed with the TAROT, COATLI, and RATIR telescopes. These consist of 133 detections and 94 upper limits. We constructed average light curves in the observer and rest frames in both X-rays (from Swift/X-Ray Telescope) and the optical. Our analysis focused on investigating the observational and intrinsic properties of GRBs. Specifically, we examined observational properties, such as the optical brightness function of the GRBs at T = 1000 s after the trigger, as well as the temporal slope of the afterglow. We also estimated the redshift distribution for the GRBs within our sample. Of the 227 GRBs analysed, we found that 116 had a measured redshift. Based on these data, we calculated a local rate of ρ0 = 0.2 Gpc−3 yr−1 for these events with z < 1. To explore the intrinsic properties of GRBs, we examined the average X-ray and optical light curves in the rest frame. We use the afterglowpy library to generate synthetic curves to constrain the parameters typical of the bright GRB jet, such as energy (〈E0〉 ∼ 1053.6 erg), opening angle (〈θcore〉 ∼ 0.2 rad), and density (〈n0〉 ∼ 10−2.1 cm−3). Furthermore, we analyse microphysical parameters, including the fraction of thermal energy in accelerated electrons (〈ϵe〉 ∼ 10−1.37) and in the magnetic field (〈ϵB〉 ∼ 10−2.26), and the power-law index of the population of non-thermal electrons (〈p〉 ∼ 2.2).

show abstract

COLIBRI, a wide-field 1.3 m robotic telescope dedicated to the transient sky

Cited by 3 publications

References 1 publication

Flux reconstruction for the NIR camera CAGIRE at the focus of the Colibrí telescope

Flux reconstruction for the NIR camera CAGIRE at the focus of the Colibrí telescope

CAGIRE: a wide-field NIR imager for the COLIBRI 1.3 meter robotic telescope

Understanding the nature of the optical emission in gamma-ray bursts: analysis from TAROT, COATLI, and RATIR observations

Contact Info

Product

Resources

About