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  • U-shaped type II solar radio bursts associated with 1980 March 28 flare 
    Markeev, A. K; Formichev, V. V; Chertok, I. M; Bhatnagar, A; Jian, R. M; Shelke, R. N; Bhonsle, R. V (Astronomical Society of India, 1983-12)
    The observations of the 1980 March 28, 2B flare in optical, radio microwave and metric and x-ray wavelengths are presented. In the dynamic radio spectrum, unusual and rare U-shaped type II radio bursts associated with this ...
  • UBV CCD standards in two galactic directions-II 
    Mohan, V; Sanwal, B. B; Paliwal, D. C; Pandey, A. K; Bhatt, B. C; Robin, A. C (Astronomical Society of India, 1996)
  • UBV CCD standards near 5C1 radio sources at intermediate galactic latitude I 
    Mohan, V; Ojha, D. K; Bienayme, O; Paliwal, D. C; Pandey, A. K; Robin, A. L; Bhatt, B. C (Astronomical Society of India, 1994)
    We have been doing a photometric and astrometric sample survey programme on Schmidt plates in a few selected directions in the Galaxy with an aim to study galactic stellar populations. In order to calibrate Schmidt plates ...
  • UBV Observations of R-Coronae Type Variables and Related Objects 
    Kameswara Rao, N (D. Reidel Publishing Co., 1980-07)
    UBV observations obtained during the period 1972-73 are presented for the following five R CrB stars: GU Sgr, SU Tau, XX CAm, DZ And, V973 Oph, and the hydrogen-poor, carbon-rich stars BD + 10 deg 2179 and HD 137613. ...
  • UBV photoelectric photometry of the open cluster NGC 2539 
    Joshi, U. C; Sagar, R (Astronomical Society of Indian, 1986-06)
    UBV photometric observations of 135 stars near NGC 2539, obtained using the 104-cm Sampurnanand reflector at Uttar Pradesh State Observatory during 1975-1978, are reported. The data are presented in tables and graphs and ...
  • UBV photometry of comet Swift-Tuttle (1992t) 
    Padalia, T. D; Gupta, S. K; Srivastava, R. K; Chaubey, U. S (Astronomical Society of India, 1993)
    The comet Swift-Tuttle (1992t) was observed through UBV filters during twelve nights in December 1992. Magnitude variations of six circular zones from the center of the cometary head have been given. On the night of 17 ...
  • UBV photometry of RV CrV 
    Abhyankar, K. D; Parthasarathy, M; Sanwal, N. B; Sarma, M. B. K (European Southern Observatory, 1974-01)
  • UBV photometry of the eclipsing binary R Canis Majoris 
    Radhakrishnan, K. R; Sarma, M. B. K; Abhyankar, K. D (Astronomical Society of India, 1985-09)
  • UBV photometry of two eclipsing binary stars 
    Chaubey, U. S; Singh, Mahendra (Astronomical Society of India, 1984-03)
    UBV light curves of the eclipsing binary systems V364 Cas and MM Cas are presented. A total of eight photoelectric times of minimum light for these stars were derived. The UBV photometric data of V364 Cas show that the ...
  • UBV(RI)_C and UVBY photometry of HD 81410 and starspot distribution in RS CVn objects 
    Mekkaden, M. V; Raveendran, A. V (The European Southern Observatory, 1998-10)
    We present UBVRI and uvby photometry of HD 81410 obtained on a total of 40 nights during 1987-90, and an analysis of its long-term photometric behaviour. The star is found to show two well-separated minima in its light ...
  • UBVR Polarimetry of the Peculiar R-Coronae Star V854-CENTAURI 
    Kameswara Rao, N; Raveendran, A. V (European Southern Observatory, 1993-07)
    We present UBVR polarimetry V 854 Cen obtained on four nights during February 1991-March 1992. Two sets of measurements are close to two nearby light maxima and the other two during the declines when the star was around 4 ...
  • UBVRI CCD photometric studies of open clusters Berkeley 15, Czernik 18 and NGC 2401 
    Sujatha, S; Babu, G. S. D; Ananthamurthy, S (Astronomical Society of India, 2004-12)
    CCD photometric observations of three open clusters Berkeley 15 (=OCl 414), Czernik 18 (=OCl 426) and NGC 2401 (=OCl 588), obtained for the first time in UBVRI filters down to V=20 mag, are presented here. They are located ...
  • UBVRI CCD photometry of the OB associations Bochum 1 and Bochum 6 
    Yadav, R. K. S; Sagar, R (Astronomical Society of India, 2003)
    We report the first deep $UBVRI$ CCD photometry of 2460 stars in the field of two poorly studied OB associations Bochum 1 and Bochum 6. We selected 15 and 14 probable members in Bochum 1 and Bochum 6 respectively using ...
  • UBVRI CCD photometry of the two southern galactic star clusters Berkeley 79 and Trumpler 11 
    Sagar, R; Cannon, R. D (Astronomical Society of India, 1994)
  • UBVRI polarization measurements of POST AGB Stars 
    Parthasarathy, M; Jain, S. K (International Astronomical Union, 1993)
  • uGMRT observations of the hot-Saturn WASP-69b: Radio-Loud Exoplanet–Exomoon Survey II (RLEES II) 
    Narang, Mayank; Oza, Apurva V; Hakim, Kaustubh; Manoj, P; Tyagi, Himanshu; Banerjee, Bihan; Surya, Arun; Nayak, Prasanta K; Banyal, R. K; Thorngren, Daniel P (Oxford University Press on behalf of Royal Astronomical Society, 2023-06)
    Exomoons have so far eluded ongoing searches. Several studies have exploited transit and transit timing variations and highresolution spectroscopy to identify potential exomoon candidates. One method of detecting and ...
  • uGMRT survey of EXoplanets around m-dwarfs (GS-EXAM): radio observations of GJ 1151 
    Narang, Mayank; Puravankara, Manoj; Vedantham, H. K; Ishwara-Chandra, C. H; De, Ayanabha; Tyagi, Himanshu; Banerjee, Bihan; Nayak, Prasanta K; Surya, Arun; Shridharan, B; Pathak, Vinod C; Tripathi, Mihir (American Astronomical Society, 2024-12)
    Coherent radio emission with properties similar to planetary auroral signals has been reported from GJ 1151, a quiescent, slow-rotating mid-M star, by the LOFAR Two-meter (120–170 MHz) Sky Survey. The observed LOFAR emission ...
  • Ultra high energy cosmic rays above 1011 GeV: Hints to new physics beyond Standard Model 
    Bhattacharjee, P (Indian Academy of Sciences, 2000-08)
    The observed cosmic ray events above 10/Sup11 GeV are difficult to explain within the context of known physics of propagation of known particles in the Universe and within the standard acceleration mechanisms that are ...
  • Ultra rapid variability in gamma CAS and lambda ERI 
    Chakraborty, A; Anandarao, B. G; Swaminathan, R (Astronomical Society of India, 1993)
    We present here preliminary results of observations on two Be stars gamma Cas and lambda Eri made during 27-30 December 1992 and 14-15 February 1993.
  • Ultra Violet Imaging Telescope (UVIT) Science* 
    Kameswara Rao, N (Astronomical Society of India, 2003)
    Some of the significant areas of astronomy that would be persued by UVIT, one of the payloads on the proposed Indian multiwavelength astronomy satellite ASTROSAT, is described. Some of the considerations and uniqueness of ...

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