Development of a 1-m Robotic Telescope System

Han, Wonyong; Mack, Peter; Lee, Chung-Uk; Park, Jang-Hyun; Jin, Ho; Kim, Ho-Il; Yuk, In-Soo; Lee, Woo-Baik; Bradstreet, Matthew

doi:10.1093/pasj/57.5.821

Cited by 10 publications

(6 citation statements)

References 6 publications

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“…We performed the optical afterglow observations using the Lulin One-meter Telescope (Huang et al 2005) and the LOAO robotic 1-m telescope (Han et al 2005;Lee et al 2010) within the framework of the EAFON (Urata et al 2003). Four color observations were made with LOT on the night of March 26.…”

Section: Observationsmentioning

confidence: 99%

Synchrotron Self-Inverse Compton Radiation From Reverse Shock on GRB 120326a

Urata

Huang

Takahashi

et al. 2014

ApJ

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We present multi-wavelength observations of a typical long duration GRB 120326A at z = 1.798, including rapid observations using a submillimeter array (SMA), and a comprehensive monitoring in X-ray and optical. The SMA observation provided the fastest detection to date among seven submillimeter afterglows at 230 GHz. The prompt spectral analysis, using Swift and Suzaku yielded a spectral peak energy of E src peak = 107.8 +15.3 −15.3 keV and equivalent isotropic energy of E iso as 3.18 +0.40 −0.32 × 10 52 erg. The temporal evolution and spectral properties in the optical were consistent with the standard forward shock synchrotron with jet collimation (6 • .69 ± 0 • .16). The forward shock modeling using a 2D relativistic hydrodynamic jet simulation also determined the reasonable burst explosion

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Section: Observationsmentioning

confidence: 99%

Synchrotron Self-Inverse Compton Radiation From Reverse Shock on GRB 120326a

Urata

Huang

Takahashi

et al. 2014

ApJ

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“…The 1-m telescope (Han et al 2005;Lee, Im & Urata 2010) is located at Mt Lemmon Optical Astronomy Observatory (LOAO) in Arizona operated by the Korea Astronomy and Space Science Institute. The observation of GRB 090426 was carried out at about 16.3 h after the burst (t ∼ 60 ks) in the R filter.…”

Section: Optical Observation and Data Reductionmentioning

confidence: 99%

Probing the nature of high-z short GRB 090426 with its early optical and X-ray afterglows

Xin¹,

Liang²,

Wei³

et al. 2010

Monthly Notices of the Royal Astronomical Society

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GRB 090426 is a short‐duration burst detected by Swift ( s in the observer frame and s in the burst frame at z= 2.609). Its host galaxy properties and some gamma‐ray‐related correlations are analogous to those seen in long‐duration gamma‐ray bursts (GRBs), which are believed to be of a massive star origin (so‐called Type II GRBs). We present the results of its early optical observations with the 0.8‐m Tsinghua University–National Astronomical Observatory of China Telescope (TNT) at Xinglong Observatory and the 1‐m LOAO telescope at Mt Lemmon Optical Astronomy Observatory in Arizona. Our well‐sampled optical afterglow light curve covers from to 104 s after the GRB trigger. It shows two shallow decay episodes that are likely due to energy injection, which end at and 7100 s, respectively. The decay slopes after the injection phases are consistent with each other (). The X‐ray afterglow light curve appears to trace the optical, although the second energy‐injection phase was missed due to visibility constraints introduced by the Swift orbit. The X‐ray spectral index is without temporal evolution. Its decay slope is consistent with the prediction of the forward shock model. Both X‐ray and optical emission are consistent with being in the same spectral regime above the cooling frequency (). The fact that is below the optical band from the very early epoch of the observation provides a constraint on the burst environment, which is similar to that seen in classical long‐duration GRBs. We therefore suggest that death of a massive star is the possible progenitor of this short burst.

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“…Lemmon Optical Astronomy Observatory (denoted as L in Table 1; Han et al 2005), in Arizona, USA, for 33 nights, the 0.6 m telescope of Sobaeksan Optical Astronomy Observatory (denoted as S in Table 1) and the 1.8 m telescope of Bohyunsan Optical Astronomy Observatory (denoted as B in Table 1), in the Republic of Korea, for 14 and 3 nights, respectively. The observations were made in 5 sessions to investigate both long-term and intraday variations: 5 nights in September, 10 nights in October, 13 nights in November, 16 nights in December, 2003, and6 nights in February, 2004.…”

Section: Observations and Data Reductionmentioning

confidence: 99%

Multi-colour optical monitoring of eight red blazars

Lee²,

Pak

et al. 2006

A&A

165

177

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Context. We present the observational results of multi-colour optical monitoring of eight red blazars from 2003 September to 2004 February. Aims. The aim of our monitoring is to investigate the spectral variability as well as the flux variations at short and long time scales. Methods. The observations were carried out using the 1.0 m robotic telescope of Mt. Lemmon Optical Astronomy Observatory, in Arizona, USA, the 0.6 m telescope of Sobaeksan Optical Astronomy Observatory and the 1.8 m telescope of Bohyunsan Optical Astronomy Observatory, in the Republic of Korea. Results. During the observations, all sources show strong flux variations with amplitudes of larger than 0.5 mag. Variations with amplitudes of over 1 mag are found in four sources. Intraday variations with amplitudes larger than 0.15 mag, and a rapid brightness increase with a rate of ∼0.2 mag per day in four days, are detected in S5 0716+71. We investigate the relationship between the colour index and source brightness for each source. We find that two out of three FSRQs tend to be redder when they are brighter, and, conversely, all BL Lac objects tend to be bluer. In particular, we find a significant anti-correlation between the V − I colour index and R magnitude for 3C 454.3. This implies that the spectrum became steeper when the source was brighter, which is opposite to the common trend for blazars. In contrast, significant positive correlations are found in 3C 66A, S5 0716+71, and BL Lac. However, there are only very weak correlations for PKS 0735+17 and OJ 287. Conclusions. We propose that the different relative contributions of the thermal versus non-thermal radiation to the optical emission may be responsible for the different trends of the colour index with brightness in FSRQs and BL Lac objects.

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Development of a 1-m Robotic Telescope System

Cited by 10 publications

References 6 publications

Synchrotron Self-Inverse Compton Radiation From Reverse Shock on GRB 120326a

Synchrotron Self-Inverse Compton Radiation From Reverse Shock on GRB 120326a

Probing the nature of high-z short GRB 090426 with its early optical and X-ray afterglows

Multi-colour optical monitoring of eight red blazars

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