Pointing of HAGAR telescope mirrors
Abstract An array of seven atmospheric Cherenkov telescopes was commissioned at a high altitude site in Hanle in the Ladakh region of the Himalayas. The array called HAGAR has been designed to observe celestial γ-rays of energy >100 GeV. Each telescope is altitude-azimuth mounted and carries seve...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Gothe, K. S. [verfasserIn] Prabhu, T. P. [verfasserIn] Vishwanath, P. R. [verfasserIn] Acharya, B. S. [verfasserIn] Srinivasan, R. [verfasserIn] Chitnis, V. R. [verfasserIn] Kamath, P. U. [verfasserIn] Srinivasulu, G. [verfasserIn] Saleem, F. [verfasserIn] Kemkar, P. M. M. [verfasserIn] Mahesh, P. K. [verfasserIn] Gabriel, F. [verfasserIn] Manoharan, J. [verfasserIn] Dorji, N. [verfasserIn] Dorjai, T. [verfasserIn] Angchuk, D. [verfasserIn] D’souza, A. I. [verfasserIn] Duhan, S. K. [verfasserIn] Nagesh, B. K. [verfasserIn] Rao, S. K. [verfasserIn] Sharma, S. K. [verfasserIn] Singh, B. B. [verfasserIn] Sudersanan, P. V. [verfasserIn] Thsering, M. Tashi [verfasserIn] Upadhya, S. S. [verfasserIn] Anupama, G. C. [verfasserIn] Britto, R. J. [verfasserIn] Cowsik, R. [verfasserIn] Saha, L. [verfasserIn] Shukla, A. [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2012 |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Experimental astronomy - Dordrecht [u.a.] : Springer Science + Business Media B.V., 1989, 35(2012), 3 vom: 13. Okt., Seite 489-506 |
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| Übergeordnetes Werk: |
volume:35 ; year:2012 ; number:3 ; day:13 ; month:10 ; pages:489-506 |
| Links: |
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| DOI / URN: |
10.1007/s10686-012-9319-9 |
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| Katalog-ID: |
SPR01245768X |
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| 520 | |a Abstract An array of seven atmospheric Cherenkov telescopes was commissioned at a high altitude site in Hanle in the Ladakh region of the Himalayas. The array called HAGAR has been designed to observe celestial γ-rays of energy >100 GeV. Each telescope is altitude-azimuth mounted and carries seven parabolic mirrors whose optic axes are co-aligned with the telescope axis. The telescopes point and track a celestial source using a PC-based drive control system. Two important issues in positioning of each HAGAR telescope are pointing accuracy of telescope axis and co-alignment of mirrors’ optic axes with the telescope axis. We have adopted a three pronged strategy to address these issues, namely use of pointing models to improve pointing accuracy of the telescopes, RA-DEC scan technique to measure the pointing offsets of the mirrors and mechanical fine-tuning of off-axis mirrors by sighting a distant stationary light source. This paper discusses our efforts in this regard as well as the current status of pointing and monitoring of HAGAR telescopes. | ||
| 650 | 4 | |a Telescope pointing |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a -ray astronomy |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Pointing model |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Atmospheric Cherenkov telescopes |7 (dpeaa)DE-He213 | |
| 700 | 1 | |a Prabhu, T. P. |e verfasserin |4 aut | |
| 700 | 1 | |a Vishwanath, P. R. |e verfasserin |4 aut | |
| 700 | 1 | |a Acharya, B. S. |e verfasserin |4 aut | |
| 700 | 1 | |a Srinivasan, R. |e verfasserin |4 aut | |
| 700 | 1 | |a Chitnis, V. R. |e verfasserin |4 aut | |
| 700 | 1 | |a Kamath, P. U. |e verfasserin |4 aut | |
| 700 | 1 | |a Srinivasulu, G. |e verfasserin |4 aut | |
| 700 | 1 | |a Saleem, F. |e verfasserin |4 aut | |
| 700 | 1 | |a Kemkar, P. M. M. |e verfasserin |4 aut | |
| 700 | 1 | |a Mahesh, P. K. |e verfasserin |4 aut | |
| 700 | 1 | |a Gabriel, F. |e verfasserin |4 aut | |
| 700 | 1 | |a Manoharan, J. |e verfasserin |4 aut | |
| 700 | 1 | |a Dorji, N. |e verfasserin |4 aut | |
| 700 | 1 | |a Dorjai, T. |e verfasserin |4 aut | |
| 700 | 1 | |a Angchuk, D. |e verfasserin |4 aut | |
| 700 | 1 | |a D’souza, A. I. |e verfasserin |4 aut | |
| 700 | 1 | |a Duhan, S. K. |e verfasserin |4 aut | |
| 700 | 1 | |a Nagesh, B. K. |e verfasserin |4 aut | |
| 700 | 1 | |a Rao, S. K. |e verfasserin |4 aut | |
| 700 | 1 | |a Sharma, S. K. |e verfasserin |4 aut | |
| 700 | 1 | |a Singh, B. B. |e verfasserin |4 aut | |
| 700 | 1 | |a Sudersanan, P. V. |e verfasserin |4 aut | |
| 700 | 1 | |a Thsering, M. Tashi |e verfasserin |4 aut | |
| 700 | 1 | |a Upadhya, S. S. |e verfasserin |4 aut | |
| 700 | 1 | |a Anupama, G. C. |e verfasserin |4 aut | |
| 700 | 1 | |a Britto, R. J. |e verfasserin |4 aut | |
| 700 | 1 | |a Cowsik, R. |e verfasserin |4 aut | |
| 700 | 1 | |a Saha, L. |e verfasserin |4 aut | |
| 700 | 1 | |a Shukla, A. |e verfasserin |4 aut | |
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10.1007/s10686-012-9319-9 doi (DE-627)SPR01245768X (SPR)s10686-012-9319-9-e DE-627 ger DE-627 rakwb eng 520 ASE 39.00 bkl Gothe, K. S. verfasserin aut Pointing of HAGAR telescope mirrors 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract An array of seven atmospheric Cherenkov telescopes was commissioned at a high altitude site in Hanle in the Ladakh region of the Himalayas. The array called HAGAR has been designed to observe celestial γ-rays of energy >100 GeV. Each telescope is altitude-azimuth mounted and carries seven parabolic mirrors whose optic axes are co-aligned with the telescope axis. The telescopes point and track a celestial source using a PC-based drive control system. Two important issues in positioning of each HAGAR telescope are pointing accuracy of telescope axis and co-alignment of mirrors’ optic axes with the telescope axis. We have adopted a three pronged strategy to address these issues, namely use of pointing models to improve pointing accuracy of the telescopes, RA-DEC scan technique to measure the pointing offsets of the mirrors and mechanical fine-tuning of off-axis mirrors by sighting a distant stationary light source. This paper discusses our efforts in this regard as well as the current status of pointing and monitoring of HAGAR telescopes. Telescope pointing (dpeaa)DE-He213 -ray astronomy (dpeaa)DE-He213 Pointing model (dpeaa)DE-He213 Atmospheric Cherenkov telescopes (dpeaa)DE-He213 Prabhu, T. P. verfasserin aut Vishwanath, P. R. verfasserin aut Acharya, B. S. verfasserin aut Srinivasan, R. verfasserin aut Chitnis, V. R. verfasserin aut Kamath, P. U. verfasserin aut Srinivasulu, G. verfasserin aut Saleem, F. verfasserin aut Kemkar, P. M. M. verfasserin aut Mahesh, P. K. verfasserin aut Gabriel, F. verfasserin aut Manoharan, J. verfasserin aut Dorji, N. verfasserin aut Dorjai, T. verfasserin aut Angchuk, D. verfasserin aut D’souza, A. I. verfasserin aut Duhan, S. K. verfasserin aut Nagesh, B. K. verfasserin aut Rao, S. K. verfasserin aut Sharma, S. K. verfasserin aut Singh, B. B. verfasserin aut Sudersanan, P. V. verfasserin aut Thsering, M. Tashi verfasserin aut Upadhya, S. S. verfasserin aut Anupama, G. C. verfasserin aut Britto, R. J. verfasserin aut Cowsik, R. verfasserin aut Saha, L. verfasserin aut Shukla, A. verfasserin aut Enthalten in Experimental astronomy Dordrecht [u.a.] : Springer Science + Business Media B.V., 1989 35(2012), 3 vom: 13. Okt., Seite 489-506 (DE-627)312841116 (DE-600)2012330-9 1572-9508 nnns volume:35 year:2012 number:3 day:13 month:10 pages:489-506 https://dx.doi.org/10.1007/s10686-012-9319-9 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OPC-AST SSG-OPC-ASE GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 39.00 ASE AR 35 2012 3 13 10 489-506 |
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10.1007/s10686-012-9319-9 doi (DE-627)SPR01245768X (SPR)s10686-012-9319-9-e DE-627 ger DE-627 rakwb eng 520 ASE 39.00 bkl Gothe, K. S. verfasserin aut Pointing of HAGAR telescope mirrors 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract An array of seven atmospheric Cherenkov telescopes was commissioned at a high altitude site in Hanle in the Ladakh region of the Himalayas. The array called HAGAR has been designed to observe celestial γ-rays of energy >100 GeV. Each telescope is altitude-azimuth mounted and carries seven parabolic mirrors whose optic axes are co-aligned with the telescope axis. The telescopes point and track a celestial source using a PC-based drive control system. Two important issues in positioning of each HAGAR telescope are pointing accuracy of telescope axis and co-alignment of mirrors’ optic axes with the telescope axis. We have adopted a three pronged strategy to address these issues, namely use of pointing models to improve pointing accuracy of the telescopes, RA-DEC scan technique to measure the pointing offsets of the mirrors and mechanical fine-tuning of off-axis mirrors by sighting a distant stationary light source. This paper discusses our efforts in this regard as well as the current status of pointing and monitoring of HAGAR telescopes. Telescope pointing (dpeaa)DE-He213 -ray astronomy (dpeaa)DE-He213 Pointing model (dpeaa)DE-He213 Atmospheric Cherenkov telescopes (dpeaa)DE-He213 Prabhu, T. P. verfasserin aut Vishwanath, P. R. verfasserin aut Acharya, B. S. verfasserin aut Srinivasan, R. verfasserin aut Chitnis, V. R. verfasserin aut Kamath, P. U. verfasserin aut Srinivasulu, G. verfasserin aut Saleem, F. verfasserin aut Kemkar, P. M. M. verfasserin aut Mahesh, P. K. verfasserin aut Gabriel, F. verfasserin aut Manoharan, J. verfasserin aut Dorji, N. verfasserin aut Dorjai, T. verfasserin aut Angchuk, D. verfasserin aut D’souza, A. I. verfasserin aut Duhan, S. K. verfasserin aut Nagesh, B. K. verfasserin aut Rao, S. K. verfasserin aut Sharma, S. K. verfasserin aut Singh, B. B. verfasserin aut Sudersanan, P. V. verfasserin aut Thsering, M. Tashi verfasserin aut Upadhya, S. S. verfasserin aut Anupama, G. C. verfasserin aut Britto, R. J. verfasserin aut Cowsik, R. verfasserin aut Saha, L. verfasserin aut Shukla, A. verfasserin aut Enthalten in Experimental astronomy Dordrecht [u.a.] : Springer Science + Business Media B.V., 1989 35(2012), 3 vom: 13. Okt., Seite 489-506 (DE-627)312841116 (DE-600)2012330-9 1572-9508 nnns volume:35 year:2012 number:3 day:13 month:10 pages:489-506 https://dx.doi.org/10.1007/s10686-012-9319-9 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OPC-AST SSG-OPC-ASE GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 39.00 ASE AR 35 2012 3 13 10 489-506 |
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10.1007/s10686-012-9319-9 doi (DE-627)SPR01245768X (SPR)s10686-012-9319-9-e DE-627 ger DE-627 rakwb eng 520 ASE 39.00 bkl Gothe, K. S. verfasserin aut Pointing of HAGAR telescope mirrors 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract An array of seven atmospheric Cherenkov telescopes was commissioned at a high altitude site in Hanle in the Ladakh region of the Himalayas. The array called HAGAR has been designed to observe celestial γ-rays of energy >100 GeV. Each telescope is altitude-azimuth mounted and carries seven parabolic mirrors whose optic axes are co-aligned with the telescope axis. The telescopes point and track a celestial source using a PC-based drive control system. Two important issues in positioning of each HAGAR telescope are pointing accuracy of telescope axis and co-alignment of mirrors’ optic axes with the telescope axis. We have adopted a three pronged strategy to address these issues, namely use of pointing models to improve pointing accuracy of the telescopes, RA-DEC scan technique to measure the pointing offsets of the mirrors and mechanical fine-tuning of off-axis mirrors by sighting a distant stationary light source. This paper discusses our efforts in this regard as well as the current status of pointing and monitoring of HAGAR telescopes. Telescope pointing (dpeaa)DE-He213 -ray astronomy (dpeaa)DE-He213 Pointing model (dpeaa)DE-He213 Atmospheric Cherenkov telescopes (dpeaa)DE-He213 Prabhu, T. P. verfasserin aut Vishwanath, P. R. verfasserin aut Acharya, B. S. verfasserin aut Srinivasan, R. verfasserin aut Chitnis, V. R. verfasserin aut Kamath, P. U. verfasserin aut Srinivasulu, G. verfasserin aut Saleem, F. verfasserin aut Kemkar, P. M. M. verfasserin aut Mahesh, P. K. verfasserin aut Gabriel, F. verfasserin aut Manoharan, J. verfasserin aut Dorji, N. verfasserin aut Dorjai, T. verfasserin aut Angchuk, D. verfasserin aut D’souza, A. I. verfasserin aut Duhan, S. K. verfasserin aut Nagesh, B. K. verfasserin aut Rao, S. K. verfasserin aut Sharma, S. K. verfasserin aut Singh, B. B. verfasserin aut Sudersanan, P. V. verfasserin aut Thsering, M. Tashi verfasserin aut Upadhya, S. S. verfasserin aut Anupama, G. C. verfasserin aut Britto, R. J. verfasserin aut Cowsik, R. verfasserin aut Saha, L. verfasserin aut Shukla, A. verfasserin aut Enthalten in Experimental astronomy Dordrecht [u.a.] : Springer Science + Business Media B.V., 1989 35(2012), 3 vom: 13. Okt., Seite 489-506 (DE-627)312841116 (DE-600)2012330-9 1572-9508 nnns volume:35 year:2012 number:3 day:13 month:10 pages:489-506 https://dx.doi.org/10.1007/s10686-012-9319-9 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OPC-AST SSG-OPC-ASE GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 39.00 ASE AR 35 2012 3 13 10 489-506 |
| allfieldsGer |
10.1007/s10686-012-9319-9 doi (DE-627)SPR01245768X (SPR)s10686-012-9319-9-e DE-627 ger DE-627 rakwb eng 520 ASE 39.00 bkl Gothe, K. S. verfasserin aut Pointing of HAGAR telescope mirrors 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract An array of seven atmospheric Cherenkov telescopes was commissioned at a high altitude site in Hanle in the Ladakh region of the Himalayas. The array called HAGAR has been designed to observe celestial γ-rays of energy >100 GeV. Each telescope is altitude-azimuth mounted and carries seven parabolic mirrors whose optic axes are co-aligned with the telescope axis. The telescopes point and track a celestial source using a PC-based drive control system. Two important issues in positioning of each HAGAR telescope are pointing accuracy of telescope axis and co-alignment of mirrors’ optic axes with the telescope axis. We have adopted a three pronged strategy to address these issues, namely use of pointing models to improve pointing accuracy of the telescopes, RA-DEC scan technique to measure the pointing offsets of the mirrors and mechanical fine-tuning of off-axis mirrors by sighting a distant stationary light source. This paper discusses our efforts in this regard as well as the current status of pointing and monitoring of HAGAR telescopes. Telescope pointing (dpeaa)DE-He213 -ray astronomy (dpeaa)DE-He213 Pointing model (dpeaa)DE-He213 Atmospheric Cherenkov telescopes (dpeaa)DE-He213 Prabhu, T. P. verfasserin aut Vishwanath, P. R. verfasserin aut Acharya, B. S. verfasserin aut Srinivasan, R. verfasserin aut Chitnis, V. R. verfasserin aut Kamath, P. U. verfasserin aut Srinivasulu, G. verfasserin aut Saleem, F. verfasserin aut Kemkar, P. M. M. verfasserin aut Mahesh, P. K. verfasserin aut Gabriel, F. verfasserin aut Manoharan, J. verfasserin aut Dorji, N. verfasserin aut Dorjai, T. verfasserin aut Angchuk, D. verfasserin aut D’souza, A. I. verfasserin aut Duhan, S. K. verfasserin aut Nagesh, B. K. verfasserin aut Rao, S. K. verfasserin aut Sharma, S. K. verfasserin aut Singh, B. B. verfasserin aut Sudersanan, P. V. verfasserin aut Thsering, M. Tashi verfasserin aut Upadhya, S. S. verfasserin aut Anupama, G. C. verfasserin aut Britto, R. J. verfasserin aut Cowsik, R. verfasserin aut Saha, L. verfasserin aut Shukla, A. verfasserin aut Enthalten in Experimental astronomy Dordrecht [u.a.] : Springer Science + Business Media B.V., 1989 35(2012), 3 vom: 13. Okt., Seite 489-506 (DE-627)312841116 (DE-600)2012330-9 1572-9508 nnns volume:35 year:2012 number:3 day:13 month:10 pages:489-506 https://dx.doi.org/10.1007/s10686-012-9319-9 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OPC-AST SSG-OPC-ASE GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 39.00 ASE AR 35 2012 3 13 10 489-506 |
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10.1007/s10686-012-9319-9 doi (DE-627)SPR01245768X (SPR)s10686-012-9319-9-e DE-627 ger DE-627 rakwb eng 520 ASE 39.00 bkl Gothe, K. S. verfasserin aut Pointing of HAGAR telescope mirrors 2012 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract An array of seven atmospheric Cherenkov telescopes was commissioned at a high altitude site in Hanle in the Ladakh region of the Himalayas. The array called HAGAR has been designed to observe celestial γ-rays of energy >100 GeV. Each telescope is altitude-azimuth mounted and carries seven parabolic mirrors whose optic axes are co-aligned with the telescope axis. The telescopes point and track a celestial source using a PC-based drive control system. Two important issues in positioning of each HAGAR telescope are pointing accuracy of telescope axis and co-alignment of mirrors’ optic axes with the telescope axis. We have adopted a three pronged strategy to address these issues, namely use of pointing models to improve pointing accuracy of the telescopes, RA-DEC scan technique to measure the pointing offsets of the mirrors and mechanical fine-tuning of off-axis mirrors by sighting a distant stationary light source. This paper discusses our efforts in this regard as well as the current status of pointing and monitoring of HAGAR telescopes. Telescope pointing (dpeaa)DE-He213 -ray astronomy (dpeaa)DE-He213 Pointing model (dpeaa)DE-He213 Atmospheric Cherenkov telescopes (dpeaa)DE-He213 Prabhu, T. P. verfasserin aut Vishwanath, P. R. verfasserin aut Acharya, B. S. verfasserin aut Srinivasan, R. verfasserin aut Chitnis, V. R. verfasserin aut Kamath, P. U. verfasserin aut Srinivasulu, G. verfasserin aut Saleem, F. verfasserin aut Kemkar, P. M. M. verfasserin aut Mahesh, P. K. verfasserin aut Gabriel, F. verfasserin aut Manoharan, J. verfasserin aut Dorji, N. verfasserin aut Dorjai, T. verfasserin aut Angchuk, D. verfasserin aut D’souza, A. I. verfasserin aut Duhan, S. K. verfasserin aut Nagesh, B. K. verfasserin aut Rao, S. K. verfasserin aut Sharma, S. K. verfasserin aut Singh, B. B. verfasserin aut Sudersanan, P. V. verfasserin aut Thsering, M. Tashi verfasserin aut Upadhya, S. S. verfasserin aut Anupama, G. C. verfasserin aut Britto, R. J. verfasserin aut Cowsik, R. verfasserin aut Saha, L. verfasserin aut Shukla, A. verfasserin aut Enthalten in Experimental astronomy Dordrecht [u.a.] : Springer Science + Business Media B.V., 1989 35(2012), 3 vom: 13. Okt., Seite 489-506 (DE-627)312841116 (DE-600)2012330-9 1572-9508 nnns volume:35 year:2012 number:3 day:13 month:10 pages:489-506 https://dx.doi.org/10.1007/s10686-012-9319-9 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OPC-AST SSG-OPC-ASE GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_138 GBV_ILN_150 GBV_ILN_151 GBV_ILN_152 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_187 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_636 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2088 GBV_ILN_2093 GBV_ILN_2106 GBV_ILN_2107 GBV_ILN_2108 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2470 GBV_ILN_2472 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_2548 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4336 GBV_ILN_4338 GBV_ILN_4393 GBV_ILN_4700 39.00 ASE AR 35 2012 3 13 10 489-506 |
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Enthalten in Experimental astronomy 35(2012), 3 vom: 13. Okt., Seite 489-506 volume:35 year:2012 number:3 day:13 month:10 pages:489-506 |
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Enthalten in Experimental astronomy 35(2012), 3 vom: 13. Okt., Seite 489-506 volume:35 year:2012 number:3 day:13 month:10 pages:489-506 |
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Telescope pointing -ray astronomy Pointing model Atmospheric Cherenkov telescopes |
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Gothe, K. S. @@aut@@ Prabhu, T. P. @@aut@@ Vishwanath, P. R. @@aut@@ Acharya, B. S. @@aut@@ Srinivasan, R. @@aut@@ Chitnis, V. R. @@aut@@ Kamath, P. U. @@aut@@ Srinivasulu, G. @@aut@@ Saleem, F. @@aut@@ Kemkar, P. M. M. @@aut@@ Mahesh, P. K. @@aut@@ Gabriel, F. @@aut@@ Manoharan, J. @@aut@@ Dorji, N. @@aut@@ Dorjai, T. @@aut@@ Angchuk, D. @@aut@@ D’souza, A. I. @@aut@@ Duhan, S. K. @@aut@@ Nagesh, B. K. @@aut@@ Rao, S. K. @@aut@@ Sharma, S. K. @@aut@@ Singh, B. B. @@aut@@ Sudersanan, P. V. @@aut@@ Thsering, M. Tashi @@aut@@ Upadhya, S. S. @@aut@@ Anupama, G. C. @@aut@@ Britto, R. J. @@aut@@ Cowsik, R. @@aut@@ Saha, L. @@aut@@ Shukla, A. @@aut@@ |
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2012-10-13T00:00:00Z |
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Gothe, K. S. |
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Gothe, K. S. ddc 520 bkl 39.00 misc Telescope pointing misc -ray astronomy misc Pointing model misc Atmospheric Cherenkov telescopes Pointing of HAGAR telescope mirrors |
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520 ASE 39.00 bkl Pointing of HAGAR telescope mirrors Telescope pointing (dpeaa)DE-He213 -ray astronomy (dpeaa)DE-He213 Pointing model (dpeaa)DE-He213 Atmospheric Cherenkov telescopes (dpeaa)DE-He213 |
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ddc 520 bkl 39.00 misc Telescope pointing misc -ray astronomy misc Pointing model misc Atmospheric Cherenkov telescopes |
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ddc 520 bkl 39.00 misc Telescope pointing misc -ray astronomy misc Pointing model misc Atmospheric Cherenkov telescopes |
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Pointing of HAGAR telescope mirrors |
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Gothe, K. S. Prabhu, T. P. Vishwanath, P. R. Acharya, B. S. Srinivasan, R. Chitnis, V. R. Kamath, P. U. Srinivasulu, G. Saleem, F. Kemkar, P. M. M. Mahesh, P. K. Gabriel, F. Manoharan, J. Dorji, N. Dorjai, T. Angchuk, D. D’souza, A. I. Duhan, S. K. Nagesh, B. K. Rao, S. K. Sharma, S. K. Singh, B. B. Sudersanan, P. V. Thsering, M. Tashi Upadhya, S. S. Anupama, G. C. Britto, R. J. Cowsik, R. Saha, L. Shukla, A. |
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Gothe, K. S. |
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pointing of hagar telescope mirrors |
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Pointing of HAGAR telescope mirrors |
| abstract |
Abstract An array of seven atmospheric Cherenkov telescopes was commissioned at a high altitude site in Hanle in the Ladakh region of the Himalayas. The array called HAGAR has been designed to observe celestial γ-rays of energy >100 GeV. Each telescope is altitude-azimuth mounted and carries seven parabolic mirrors whose optic axes are co-aligned with the telescope axis. The telescopes point and track a celestial source using a PC-based drive control system. Two important issues in positioning of each HAGAR telescope are pointing accuracy of telescope axis and co-alignment of mirrors’ optic axes with the telescope axis. We have adopted a three pronged strategy to address these issues, namely use of pointing models to improve pointing accuracy of the telescopes, RA-DEC scan technique to measure the pointing offsets of the mirrors and mechanical fine-tuning of off-axis mirrors by sighting a distant stationary light source. This paper discusses our efforts in this regard as well as the current status of pointing and monitoring of HAGAR telescopes. |
| abstractGer |
Abstract An array of seven atmospheric Cherenkov telescopes was commissioned at a high altitude site in Hanle in the Ladakh region of the Himalayas. The array called HAGAR has been designed to observe celestial γ-rays of energy >100 GeV. Each telescope is altitude-azimuth mounted and carries seven parabolic mirrors whose optic axes are co-aligned with the telescope axis. The telescopes point and track a celestial source using a PC-based drive control system. Two important issues in positioning of each HAGAR telescope are pointing accuracy of telescope axis and co-alignment of mirrors’ optic axes with the telescope axis. We have adopted a three pronged strategy to address these issues, namely use of pointing models to improve pointing accuracy of the telescopes, RA-DEC scan technique to measure the pointing offsets of the mirrors and mechanical fine-tuning of off-axis mirrors by sighting a distant stationary light source. This paper discusses our efforts in this regard as well as the current status of pointing and monitoring of HAGAR telescopes. |
| abstract_unstemmed |
Abstract An array of seven atmospheric Cherenkov telescopes was commissioned at a high altitude site in Hanle in the Ladakh region of the Himalayas. The array called HAGAR has been designed to observe celestial γ-rays of energy >100 GeV. Each telescope is altitude-azimuth mounted and carries seven parabolic mirrors whose optic axes are co-aligned with the telescope axis. The telescopes point and track a celestial source using a PC-based drive control system. Two important issues in positioning of each HAGAR telescope are pointing accuracy of telescope axis and co-alignment of mirrors’ optic axes with the telescope axis. We have adopted a three pronged strategy to address these issues, namely use of pointing models to improve pointing accuracy of the telescopes, RA-DEC scan technique to measure the pointing offsets of the mirrors and mechanical fine-tuning of off-axis mirrors by sighting a distant stationary light source. This paper discusses our efforts in this regard as well as the current status of pointing and monitoring of HAGAR telescopes. |
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| title_short |
Pointing of HAGAR telescope mirrors |
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https://dx.doi.org/10.1007/s10686-012-9319-9 |
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| author2 |
Prabhu, T. P. Vishwanath, P. R. Acharya, B. S. Srinivasan, R. Chitnis, V. R. Kamath, P. U. Srinivasulu, G. Saleem, F. Kemkar, P. M. M. Mahesh, P. K. Gabriel, F. Manoharan, J. Dorji, N. Dorjai, T. Angchuk, D. D’souza, A. I. Duhan, S. K. Nagesh, B. K. Rao, S. K. Sharma, S. K. Singh, B. B. Sudersanan, P. V. Thsering, M. Tashi Upadhya, S. S. Anupama, G. C. Britto, R. J. Cowsik, R. Saha, L. Shukla, A. |
| author2Str |
Prabhu, T. P. Vishwanath, P. R. Acharya, B. S. Srinivasan, R. Chitnis, V. R. Kamath, P. U. Srinivasulu, G. Saleem, F. Kemkar, P. M. M. Mahesh, P. K. Gabriel, F. Manoharan, J. Dorji, N. Dorjai, T. Angchuk, D. D’souza, A. I. Duhan, S. K. Nagesh, B. K. Rao, S. K. Sharma, S. K. Singh, B. B. Sudersanan, P. V. Thsering, M. Tashi Upadhya, S. S. Anupama, G. C. Britto, R. J. Cowsik, R. Saha, L. Shukla, A. |
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| doi_str |
10.1007/s10686-012-9319-9 |
| up_date |
2024-07-04T03:10:08.246Z |
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| score |
7.398464 |