IIAP Publications: Recent submissions

  • TANSPEC: TIFR-ARIES Near-infrared Spectrometer 
    Sharma, Saurabh; Ojha, Devendra. K; Ghosh, Arpan; Ninan, Joe. P; Ghosh, Supriyo; Ghosh, Swarna. K; Manoj, P; Naik, Milind. B; D'Costa, Savio, L. A; Reddy, B. Krishna; Nanjappa, Nandish; Pandey, Rakesh; Sinha, Tirthendu; Panwar, Neelam; Susmitha, A; Kaur, Harmeen; Sahu, Sanjit; Bangia, Tarun; Poojary, Satheesha S; Jadhav, Rajesh. B; Bhagat, Shailesh. B; Meshram, Ganesh. S; Shah, Harshit; Rayner, John. T; Toome, Douglas. W; Sandimani, Pradeep. R (IOP Publishing Ltd on behalf of the Astronomical Society of the Pacific, 2022-08)
    We present the design and performance of the TANSPEC, a medium-resolution 0.55–2.5 μm cryogenic spectrometer and imager, now in operation at the 3.6 m Devasthal Optical Telescope (DOT), Nainital, India. The TANSPEC provides ...
  • On the Bianchi identity in generalized theories of gravity 
    Kolekar, Sanved (Springer, 2022-08)
    We examine the generalised Bianchi identity, ∇a Eab = 0 where Eab is the equation of motion tensor of a general class of theories of gravity whose Lagrangian L(gab, Ra bcd ) depends arbitrarily on gab and Ra bcd but ...
  • The near ultraviolet transient surveyor (NUTS): An ultraviolet telescope to observe variable sources 
    Ambily, S; Sarpotda, Mayuresh; Mathew, Joice; Binukumar, G; Sreejith, A. G; Nirmal, K; Murthy, J; Safonova, M; Mohan, Rekhesh; Aggarval, Vinod Kumar; Nagabhushanam, S; Jeeragal, Sachin (Springer, 2022-08)
    Observing the ultraviolet (UV) sky for time-varyiable phenomena is one of the many exciting science goals that can be achieved by a relatively small aperture telescope in space. The Near Ultraviolet Transient Surveyor ...
  • The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package 
    The Astropy Collaboration; Price-Whelan, Adrian M; Lim, Pey Lian; Earl, Nicholas; Starkman, Nathaniel; Bradley, Larry; Shupe, David L; Patil, Aarya A; Corrales, Lia; Brasseur, C. E; Nothe, Maximilian; Singer, Leo P; Singhal, Jaladh; Sinha, Manodeep; Sipocz, Brigitta M; Spitler, Lee R; Stansby, David; Streicher, Ole; Sumak, Jani; Tollerud, Erik; Swinbank, John D; Paper Authors; Taranu, Dan S; Tewary, Nikita; Tremblay, Grant R; Val-Borro, Miguel de; Kooten, Samuel J. Van; Vasovic, Zlatan; Verm, Shresth; Cardoso, Jose Vinícius de Miranda; Williams, Peter K. G; Morris, Brett M; Aldcroft, Thomas L; Wilson, Tom J; Winkel, Benjamin; Wood-Vasey, W. M; Xue, Rui; Yoachim, Peter; Zhang, Chen; Zonca, Andrea; Astropy Project Contributors; Ginsburg, Adam; Vaher, Eero; Alvarado-Montes, Jaime A; Weaver, Benjamin A; Tocknell, James; Jamieson, William; Kerkwijk, Marten H. van; Robitaille, Thomas P.; Merry, Bruce; Bachetti, Matteo; Gunthe, H. Moritz; Archibald, Anne M; Bodi, Attila; Bapat, Shreyas; Barentsen, Geert; Bazan, Juanjo; Biswas, Manish; Boquien, Mederic; Handberg, Rasmus; Burke, D. J; Cara, Daria; Cara, Mihai; Conroy, Kyle E; Conseil, Simon; Craig, Matthew W; Cross, Robert M; Cruz, Kelle L; D'Eugenio, Francesco; Dencheva, Nadia; Hart, Akeem; Devillepoix, Hadrien A. R; Dietrich, Jorg P; Eigenbrot, Arthur Davis; Erben, Thomas; Ferreira, Leonardo; Foreman-Macke, Daniel; Fox, Ryan; Freij, Nabil; Garg, Suyog; Geda, Robel; Hatfield-Dodds, Zac; Glattly, Lauren; Gondhalekar, Yash; Gordon, Karl D; Grant, David; Greenfield, Perry; Groener, Austen M; Guest, Steve; Gurovich, Sebastian; Homeier, Derek; Hosseinzadeh, Griffin; Jenness, Tim; Jones, Craig K; Joseph, P; Kalmba, J. Bryce; Karamehmetoglu, Emir; Salgado, Jesus; Kałuszynski, Mikołaj; Kelley, Michael S. P; Kern, Nicholas; Kerzendor, Wolfgang E; Koch, Eric W; Kulumani, Shankar; Lee, Antony; Ly, Chun; M, Zhiyuan; MacBride, Conor; Sanghi, Aniket; Maljaars, Jakob M; Muna, Demitri; Murphy, N. A; Norman, Henrik; O'Steen, Richard; Oman, Kyle A; Pacifici, Camilla; Pascual, Sergio; Pascual-Granado, J; Patil, Rohit R; Saunders, Nicholas; Perren, Gabriel I; Pickering, Timothy E; Rastogi, Tanuj; Roulston, Benjamin R; Ryan, Daniel F; Rykoff, Eli S; Sabater, Jose; Sakurikar, Parikshit; Savchenko, Volodymyr; Schwardt, Ludwig; Seifert-Eckert, Michael; Shih, Albert Y; Jain, Anany Shrey; Shukla, Gyanendra; Sick, Jonathan; Donath, Axel; Simpson, Chris; Singanamalla, Sudheesh (American Astronomical Society, 2022-08-20)
    The Astropy Project supports and fosters the development of open-source and openly developed Python packages that provide commonly needed functionality to the astronomical community. A key element of the Astropy Project ...
  • SCALES on Keck: optical design 
    Kupke, Renate; Stelter, R. Deno; Hasan, Amirul; Surya, Arun; Kain, Isabel; Briesemeister, Zackery; Li, Jialin; Hinz, Phil; Skemer, Andrew; Gerard, Benjamin; Dillon, Daren; Ratliff, Christopher (SPIE-The International Society for Optical Engineering, 2022-08)
    SCALES is a high-contrast, infrared coronagraphic imager and integral field spectrograph (IFS) to be deployed behind the W.M. Keck Observatory adaptive optics system. A reflective optical design allows diffraction-limited ...
  • Design and development of WFOS, the Wide-Field Optical Spectrograph for the Thirty Meter Telescope 
    Steidel, Charles; Peng, Eric; Fucik, Jason; Nash, Reston; Kaye, Stephen; Jacoby, George; Delabre, Bernard; Ramya, S; Divakar, Devika; Varshney, Hari Mohan; Sivarani, T; Uraguchi, Fumihiro; Ozaki, Shinobu; Ji, Hangxin; Tao, L V; Chiu, Kent; Zhu, Qinfeng; Andersen, David; Miles, John; Lasi, Davide (SPIE-The International Society for Optical Engineering, 2022-08)
    We present the current design of WFOS, a wide-field UV/optical (0.31-1.0 µm) imaging spectrograph planned for first-light on the TMT International Observatory 30 m telescope. WFOS is optimized for high sensitivity across ...
  • Design of SCALES: a 2-5 micron coronagraphic integral field spectrograph for Keck Observatory 
    Skemer, Andrew J; Stelter, R. Deno; Sallum, Stephanie; MacDonald, Nicholas; Kupke, Renate; Ratliff, Christopher; Banyal, R. K; Hasan, Amirul; Varshney, Hari Mohan; Surya, Arun; Prakaesh, Ajin; Sivarani, T; Ramya, S; Govinda, K. V; Fitzgerald, Michael P; Wang, Eric; Kassis, Marc; Absil, Olivier; Alvarez, Carlos; Batalha, Natasha; Boucher, Marc-Andre; Bourgenot, Cyril; Brandt, Timothy; Briesemeister, Zackery; Kleer, Katherine de; Pater, Imke de; Deich, William; Divakar, Devika; Filion, Guillaume; Gauvin, Etienne; Gonzales, Michael; Greene, Thomas; Hinz, Philip; Jensen-Clem, Rebecca; Johnson, Christopher; Kain, Isabel; Kruglikov, Gabriel; Lach, Mackenzie; Landry, Jean-Thomas; Li, Jialin; Liu, Michael C; Lyke, James; Magnon, Kenneth; Marin, Eduardo; Martin, Emily; Martinez, Raquel; Mawet, Dimitri; Miles, Brittany; Sandford, Dale; Sheehan, Patrick; Sohn, Ji Man; Stone, Jordan (SPIE-The International Society for Optical Engineering, 2022-08)
    We present the design of SCALES (Slicer Combined with Array of Lenslets for Exoplanet Spectroscopy) a new 2-5 micron coronagraphic integral field spectrograph under construction for Keck Observatory. SCALES enables ...
  • Innovations and advances in instrumentation at the W. M. Keck Observatory, vol. II 
    Kassis, Marc F; Allen, Steve; Alvarez, Carlos; Banyal, R. K; Bertz, Robert; Beichman, Charles; Brown, Aaron; Brown, Matthew; Cabak, Gerald; Bundy, Kevin; Cetre, Sylvain; Chin, Jason; Chun, Mark; Deich, Will; Dekany, Richard; Delorme, Jacques; Devenot, Mark; Doppmann, Greg; Fitzgerald, Michael P; Fucik, Jason R; Hill, Grant; Hinz, Philip; Holden, Bradford P; Howard, Andrew; Gao, Maodong; Gibson, Steve; Gomez, Percy; Gottschalk, Colby; Gillingham, Peter R; Jones, Tucker; Jovanovic, Nemanja; Kirby, Evan; Konopacky, Quinn; Krishnan, Shanti; Kupke, Renate; Larkin, James E.; Leife, Stephanie D; Lewis, Hilton A; Lilley, Scott; Lu, Jessica; Lyk, James E; MacDonald, Nick; Marin, Eduardo; Matuszewski, Matt; Mawet, Dimitri; McGurk, Rosalie; A Millar-Blanchaer, Maxwell; Nash, Reston B; Nance, Craig; Neill, James D; M. O'Meara, John; Peretz, Eliad; Poppett, Claire L; Mather, John C; Radovan, Matthew V; Roberts, Mitsuko K; Ragland, Sam; Rider, Kodi; Rockosi, Constance M; Sandfor, Dale; Shen, Boqiang; Steidel, Charles C; Simha, Sunil; Skemer, Andy; Stelter, Deno; Surendran, Avinash; Thorne, James; McCarney, Ben; Lanclos, Kyle; Baker, Ashley; Rubenzah, Ryan; Roy, Arpita; Halverson, Sam; Edelstein, Jerry; Martin, Christopher; Savage, Maureen; Sandford, Dale; Sallum, Stephanie; Walawender, Josh; Wizinowich, Peter; Westfall, Kyle B; Vahala, Kerry J; Wright, Shelley; Wold, Truman; Yeh, Sherry (SPIE-The International Society for Optical Engineering, 2022-08)
    Since the start of science operations in 1993, the twin 10-meter W. M. Keck Observatory (WMKO) telescopes have continued to maximize their scientific impact and to produce transformative discoveries that keep the observing ...
  • Study on segmentation and alignment related effects in a 10m class telescope 
    Jacob, A; Parihar, P. S; James, Melvin K; Radhika, Dharmadhikari (SPIE-The International Society for Optical Engineering, 2022-08)
    Indian astronomers are aiming to build a large 10m class optical-NIR telescope, equipped with state-of art instruments. After exploring many potential design options, we ended up with two mirror Ritchey-Chretien (RC) type ...
  • Design and development of a mirror support system for prototype segmented mirror telescope 
    Govinda, K. V; Parihar, P. S; Kemkar, P. M. M; Goudar, Abhishek; Sandeep, D. S; Muthahar, R. Mohammed; Sagayanathan, K; Radhika, Dharmadhikari; Divya, P. H (SPIE-The International Society for Optical Engineering, 2022-08)
    The segment support system of any segmented mirror telescope is considered to be one of the most critical subsystem. The segment support not only holds the mirror without altering its figure, but also features mechanism ...
  • The 50cm robotic telescope: control system upgrade and automation 
    Stanzin, Tsewang; Jorphail, S; Parihar, P. S; Angchuk, D; Dorjai, T; Gyalson, T; Mahey, T. T; Dorjay, Padma; Dorjay, Phuntsok; Phunchok, Tsewang; Pamber, Tashi; Stanzin, Urgain; Angdu, Skalzang (SPIE-The International Society for Optical Engineering, 2022-08)
    We describe the details into the design and development of a low-cost yet efficient telescope control system (TCS) and observatory control software (OCS) for the 50cm telescope at the Indian Astronomical Observatory. The ...
  • Design of an IR imaging channel for the Keck Observatory SCALES instrument 
    Banyal, R. K; Hasan, Armirul; Kupke, Reni; Varshney, Hari Mohan; Prakaesh, Ajin; Sivarani, T; Skemer, Andy J; MacDonald, Nick; Sallum, Steph; Deich, Will; Fitzgerald, Michael P; Govinda, K. V; Ratliff, Chris; Ramya, S; Stelter, Deno; Surya, Arun; Wang, Eric (SPIE-The International Society for Optical Engineering, 2022-08)
    A next-generation instrument named, Slicer Combined with Array of Lenslets for Exoplanet Spectroscopy (SCALES), is being planned for the W. M. Keck Observatory. SCALES will have an integral field spectrograph (IFS) and a ...
  • Towards the development of the Infrared Guide Star Catalogue for the adaptive optics observations by the Thirty Meter Telescope 
    Shah, Sarang; Subramanian, S; Anupama, G. C; Delgado, Francisco; Gillies, Kim; Maheswar, G; Narayanan, Rajalakshmi; Ramaprakash, A. N; Rao, Suhasini; Reddy, B. E; Skidmore, Warren; Sivarani, T; Subramaniam, A (SPIE-The International Society for Optical Engineering, 2022-08)
    At first light, the NIR instruments of TMT will be assisted by a multi-conjugate adaptive optics instrument, known as the Narrow Field Infrared Adaptive Optics System (NFIRAOS). NFIRAOS will use laser guide stars for ...
  • Host galaxy magnitude of OJ 287 from its colours at minimum light 
    Valtonen, Mauri J; Dey, Lankeswar; Zola, S; Ciprini, S; Kidger, M; Pursimo, T; Gopakumar, A; Matsumoto, K; Sadakane, K; Caton, D. B; Nilsson, K; Komossa, S; Bagaglia, M; Baransky, A; Boumis, P; Boyd, D; Castro-Tirado, A. J; Debski, B; Drozdz, M; Perez, A. Escartin; Fiorucci, M; Garcia, F; Gazeas, K; Ghosh, S; Godunova, V; Gomez, J. L; Gredel, R; Grupe, D; Haislip, J. B; Henning, T; Hurst, G; Janík, J; Kouprianov, V. V; Lehto, H; Liakos, A; Mathur, S; Mugrauer, M; Nogues, R. Naves; Nucciarelli, G; Ogloza, W; Ojha, D. K; Pajdosz-Śmierciak, U; Pascolini, S; Poyner, G; Reichart, D. E; Rizzi, N; Roncella, F; Sahu, D. K; Sillanpää, A; Simon, A; Siwak, M; Alfaro, F. C. Soldán; Sonbas, E; Tosti, G; Vasylenko, V; Webb, J. R; Zielinski, P (Oxford University Press on behalf of Royal Astronomical Society, 2022-08)
    OJ 287 is a BL Lacertae type quasar in which the active galactic nucleus (AGN) outshines the host galaxy by an order of magnitude. The only exception to this may be at minimum light when the AGN activity is so low that ...
  • Growth of disc-like pseudo-bulges in SDSS DR7 since z = 0.1 
    Ankit Kumar; Kataria, Sandeep Kumar (Oxford University Press on behalf of Royal Astronomical Society, 2022-08)
    Cosmological simulations predict more classical bulges than their observational counterparts in the local Universe. Here, we quantify evolution of the bulges since z = 0.1 using photometric parameters of nearly 39 000 ...
  • Radio Evolution of a Type IIb Supernova SN 2016gkg 
    Nayana, A. J; Chandra, Poonam; Krishna, Anoop; Anupama, G. C (American Astronomical Society, 2022-08-01)
    We present extensive radio monitoring of a Type IIb supernova (SN IIb), SN 2016gkg during t ∼ 8−1429 days postexplosion at frequencies ν ∼ 0.33−25 GHz. The detailed radio light curves and spectra are broadly consistent with ...
  • Properties of ubiquitous magnetic reconnection events in the lower solar atmosphere 
    Joshi, Jayant; van der Voort, Luc Rouppe, H. M (EDP Sciences, 2022-08)
    Context. Magnetic reconnection in the deep solar atmosphere can give rise to enhanced emission in the Balmer hydrogen lines, a phenomenon referred to as Ellerman bombs. Recent high-quality Hβ observations indicate that ...
  • Implications of an Extended Dark Energy Model with Massive Neutrinos 
    Sharma, Ravi Kumar; Pandey, Kanhaiya L; Das, Subinoy (American Astronomical Society, 2022-08-01)
    Recently there have been reports of finding a lower bound on the neutrino mass parameter (Σmν) when using the Atacama Cosmology Telescope (ACT) and SPTpol data; however, these bounds on the Σmν are still weaker for most ...
  • Galactic Chemical Evolution of Exoplanet Hosting Stars: Are High-mass Planetary Systems Young? 
    Swastik, C; Banyal, R. K; Narang, Mayank; Manoj, P; Sivarani, T; Rajaguru, S. P; Athira Unni; Banerjee, Bihan (American Astronomical Society, 2022-08-01)
    The imprints of stellar nucleosynthesis and chemical evolution of the galaxy can be seen in different stellar populations, with older generation stars showing higher α-element abundances and the later generations ...
  • On the origin of core radio emissions from black hole sources in the realm of relativistic shocked accretion flow 
    Das, Santabrata; Nandi, Anuj; Stalin, C. S; Rakshit, Suvendu; Dihingia, Indu Kalpa; Singh, Swapnil; Aktar, Ramiz; Mitra, Samik (Oxford University Press on behalf of Royal Astronomical Society, 2022-08)
    We study the relativistic, inviscid, advective accretion flow around the black holes and investigate a key feature of the accretion flow, namely the shock waves. We observe that the shock-induced accretion solutions are ...

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