• COALab

    Computational & Observational Astronomy Lab, Department of Physical Sciences, Independent University, Bangladesh

  • MerIDiAn

    Merit Internship in Data-intensive Astronomy

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News and Publications

Recent achievements of COALab people and recent papers published in international journals and conference proceedings

Our Postbac RA starts a funded MSc at NDSU

Many congratulations to our Postbac Research Assistant (PRA) Fatema Akter who is starting a funded MSc at North Dakota State University, USA, from Spring 2025. She joined COALab in March 2024 and she will work here until November 2024. Working…

The SARAO MeerKAT 1.3 GHz Galactic Plane Survey

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We present the SARAO MeerKAT Galactic Plane Survey (SMGPS), a 1.3 GHz continuum survey of almost half of the Galactic Plane ($251^\circ \le l \le 358^\circ$ and $2^\circ \le l \le 61^\circ$ at $|b| \le 1.5^\circ$). SMGPS is the…

Morphological classification of Radio Galaxies using Semi-Supervised Group Equivariant CNNs

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Out of the estimated few trillion galaxies, only around a million have been detected through radio frequencies, and only a tiny fraction, approximately a thousand, have been manually classified. We have addressed this disparity between labeled…

Mining mini-halos with MeerKAT I. Calibration and imaging

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Radio mini-halos are clouds of diffuse, low-surface brightness synchrotron emission that surround the Brightest Cluster Galaxy (BCG) in massive cool-core galaxy clusters. In this paper, we use third generation calibration (3GC), also called…

The 1.28 GHz MeerKAT Galactic Center Mosaic

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The inner $\sim 200$ pc region of the Galaxy contains a 4 million $M_\odot$ supermassive black hole (SMBH), significant quantities of molecular gas, and star formation and cosmic-ray energy densities that are roughly two orders of magnitude…

Primary beam effects of radio astronomy antennas – II. Modelling MeerKAT L-band beams

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After a decade of design and construction, South Africa’s SKA-MID precursor MeerKAT has begun its science operations. To make full use of the widefield capability of the array, it is imperative that we have an accurate model of the primary…

Constraining the intergalactic medium at z ≈ 9.1 using LOFAR Epoch of Reionization observations

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We derive constraints on the thermal and ionization states of the intergalactic medium (IGM) at redshift $\approx 9.1$ using new upper limits on the 21-cm power spectrum measured by the LOFAR radio telescope and a prior on the ionized fraction…

Improved upper limits on the 21 cm signal power spectrum of neutral hydrogen at z ≈ 9.1 from LOFAR

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A new upper limit on the 21 cm signal power spectrum at a redshift of $z \approx 9.1$ is presented, based on 141 h of data obtained with the Low-Frequency Array (LOFAR). The analysis includes significant improvements in spectrally smooth…

The 1.28 GHz MeerKAT DEEP2 Image

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We present the confusion-limited 1.28 GHz MeerKAT DEEP2 image covering one $\theta_b\approx 68'$ FWHM primary-beam area with $\theta=7.6^{''}$ FWHM resolution and $\sigma_n=0.55\pm 0.01$ $\mu$Jy beam$^{-1}$ rms noise. Its J2000 center position…

Upcoming Events

Events of interest for COALab

LOFAR-EoR Plenary Meeting

April 28, 2025 - May 2, 2025Bulgaria

সক: সহজ কথা

এস্ট্রোনমারদের ব্যক্তিগত মতামত, পপুলার সায়েন্স ও ফিলোসফি

অন্ধকারের উৎস-হতে উৎসারিত আলো

আজ থেকে চৌদ্দ বিলিয়ন বছর আগে বিগব্যাং নামের এক অদ্ভুত ঘটনার মাধ্যমে আমাদের ইউনিভার্সের জন্ম।…

পালসারের বিমে স্থানকালের ঢেউ

আজ থেকে প্রায় ১৩০ কোটি বছর আগে এক জোড়া সাধারণ ব্ল্যাকহোল একসাথে মিলে আরো বড় একটা ব্ল্যাকহোল…

অদৃশ্য আলোতে আকাশগঙ্গার অন্তর

পৃথিবীর সবচেয়ে ভালো রেডিও দুরবিন দিয়ে তোলা হয়েছে আমাদের গ্যালাক্সি আকাশগঙ্গার এক অবিশ্বাস্য…