109 citations · 421 across the 21 of their papers we have counts for
21 papers
Exploring the multi-wavelength properties of the high energetic event ZTF20abbiixp/GRB 200524A: from prompt emission to afterglow
A. Ghosh, Dimple, K. Misra +32
We conducted a comprehensive multi-wavelength analysis of a high energetic long-duration ZTF20abbiixp / GRB~200524A detected by \textit{Fermi} Gamma Ray Burst Monitor (GBM). Our st…
Photometric and Spectroscopic Studies of Type Ic Supernovae SN 2020akf and SN 2021mxx
Mulchand Kurre, K. R. Sahu, Shrutika Tiwari +8
We present a comprehensive analysis of optical photometry and medium-resolution spectroscopy for Type Ic supernovae (SNe) SN 2020akf and SN 2021mxx. Our study covers the evolution…
Modeling the late time merger ejecta emission in short Gamma Ray Bursts
Ankur Ghosh, Kuntal Misra, C. S. Vaishnava +5
The short Gamma Ray Bursts (GRBs) are the aftermath of the merger of binary compact objects (neutron star -- neutron star or neutron star -- black hole systems). With the simultane…
Weak secondary cyclotron line in eclipsing High Mass X-ray Binary Cen X-3
Pravat Dangal, Ranjeev Misra, Nand Kumar Chakradhari +1
We report the time resolved spectroscopy result from two observations of Cen X-3, over one binary orbit with ASTROSAT and two binary orbit with NuSTAR. NuSTAR covered two intensity…
Type Ia supernovae SN 2013bz, PSN J0910+5003 and ASASSN-16ex: similar to 09dc-like?
S. Tiwari, N. K. Chakradhari, D. K. Sahu +3
We present optical photometric and spectroscopic studies of three supernovae (SNe) SN 2013bz, PSN J0910+5003 and ASASSN-16ex. UV-optical photometric data of ASASSN-16ex obtained wi…
Can the violent merger of white dwarfs explain the slowest declining Type Ia supernova SN 2011aa?
Anirban Dutta, G C Anupama, N K Chakradhari +1
We present optical observations and Monte Carlo radiative transfer modeling of the Type Ia supernova SN 2011aa. With a of mag and a peak magnitude $M_…
Search for merger ejecta emission from late time radio observations of short GRBs using GMRT
Ankur Ghosh, C. S. Vaishnava, L. Resmi +4
Short gamma-ray bursts (GRBs) are the aftermath of compact binary mergers involving neutron stars. If the merger remnant is a millisecond magnetar instead of a black hole, a signif…
Study of Chemically Peculiar Stars-I : High-resolution Spectroscopy and K2 Photometry of Am Stars in the Region of M44
Santosh Joshi, Otto Trust, E. Semenko +30
We present a study based on the high-resolution spectroscopy and K2 space photometry of five chemically peculiar stars in the region of the open cluster M44. The analysis of the hi…
Quest for the upcoming periastron passage of an episodic dust maker and particle accelerating colliding wind binary: WR 125
Bharti Arora, J. C. Pandey, M. De Becker +4
We have carried out a long term infrared and X-ray investigation of the colliding wind binary WR 125 (WC7+O9III). The source was monitored using AstroSat-Soft X-ray Telescope and T…
Observational properties of a Type Ib Supernova MASTER OT J120451.50+265946.6 in NGC 4080
Mridweeka Singh, Kuntal Misra, D. K. Sahu +12
MASTER OT J120451.50+265946.6 (M12045), discovered by the MASTER Global Robotic Net, is a Type Ib supernova (SN) that exploded in NGC 4080. We present the {\it BVRI} photometric an…
Highly reddened type Ia supernova SN 2004ab: another case of anomalous extinction
N. K. Chakradhari, D. K. Sahu, G. C. Anupama +1
We present optical photometric and spectroscopic results of supernova SN 2004ab, a highly reddened normal type Ia supernova. The total reddening is estimated as = 1.70 $\p…
Exploring the optical behaviour of a type Iax supernova SN 2014dt
Mridweeka Singh, Kuntal Misra, D. K. Sahu +9
We present optical photometric (upto 410 days since ) and spectroscopic (upto 157 days since ) observations of a Type Iax supernova (SN) 2014dt lo…
The hot Gamma-Doradus and Maia stars
L. A. Balona, C. A. Engelbrecht, Yogesh C. Joshi +8
The hot ~Doradus stars have multiple low frequencies characteristic of ~Dor or SPB variables, but are located between the red edge of the SPB and the blue edge of the ~Dor…
The Nainital-Cape Survey-IV
Santosh Joshi, P. Martinez, Sowgata Chowdhury +6
The Nainital-Cape survey is a dedicated ongoing survey programme to search for and study pulsational variability in chemically peculiar (CP) stars to understand their internal stru…
Supernova SN 2012dn: A spectroscopic clone of SN 2006gz
N. K. Chakradhari, D. K. Sahu, S. Srivastav +1
We present optical and UV analysis of the luminous type Ia supernova SN 2012dn covering the period 11 to +109 days with respect to the band maximum, that occurred on JD…
Study of Dust and Ionized gas in Early-type Galaxies
Samridhi Kulkarni, D. K. Sahu, Laxmikant Chaware +2
We present results of optical broad-band and narrow-band Halpha observations of a sample of forty nearby early-type galaxies. The majority of sample galaxies are known to have dust…
One year of monitoring of the Type IIb supernova SN 2011dh
D. K. Sahu, G. C. Anupama, N. K. Chakradhari
Optical photometry and low resolution spectroscopy of the type IIb supernova SN 2011dh in M51 are presented, covering the first year after the explosion. The light curve an…
A spectroscopic analysis of the chemically peculiar star HD207561
S. Joshi, E. Semenko, P. Martinez +7
In this paper we present a high-resolution spectroscopic analysis of the chemically peculiar star HD207561. During a survey programme to search for new roAp stars in the Northern h…
Time-resolved photometric and spectroscopic analysis of a luminous Ap star HD103498
S. Joshi, T. Ryabchikova, O. Kochukhov +4
We present the results on the photometric and spectroscopic monitoring of a luminous Ap star HD103498. The time-series photometric observations were carried out on 17 nights using…
The Nainital-Cape Survey-III : A Search for Pulsational Variability in Chemically Peculiar Stars
S. Joshi, D. L. Mary, N. K. Chakradhari +2
The Nainital-Cape survey is a dedicated research programme to search and study pulsational variability in chemically peculiar stars in the Northern Hemisphere. The aim of the surve…
ESC observations of SN 2005cf. I. Photometric Evolution of a Normal Type Ia Supernova
A. Pastorello, S. Taubenberger, N. Elias-Rosa +20
We present early-time optical and near-infrared photometry of supernova (SN) 2005cf. The observations, spanning a period from about 12 days before to 3 months after maximum, have b…