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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').

534 results found.

  1. GRB 111022B: MITSuME Akeno Optical upper limits
  2. GRB 111016A: MITSuME Akeno Optical upper limits
  3. GRB 110921A: MITSuME-Akeno Optical photometry
  4. GRB 110921A: MITSuME Akeno Optical Observation
  5. GRB110915A MITSuME Okayama J-band upper-limit
  6. GRB 110915A: MITSuME Okayama and Ishigakijima Optical upper limits
  7. GRB 110915A: MITSuME Akeno Optical upper limits
  8. GRB110820A: MITSuME Ishigakijima Optical Upper Limits
  9. GRB110801A: MITSuME Ishigakijima Optical Observation at 1 day after the burst
  10. GRB110801A: MITSuME Ishigakijima Optical Observation
  11. GRB110731A: MITSuME Ishigakijima Optical Upper Limits
  12. GRB110726A: MITSuME Ishigakijima Optical Observation
  13. GRB110709A: MITSuME Ishigakijima Optical upper limits
  14. GRB110530A: MITSuME Okayama Optical Observation
  15. GRB 110530A: MITSuME Akeno Optical Observation
  16. GRB110422A: MITSuME Ishigakijima Optical Observation
  17. GRB110414A: MITSuME Ishigakijima Optical upper limits
  18. GRB110414A: MITSuME Okayama Optical upper limits
  19. GRB 110407A: MITSuME Okayama and Ishigakijima Optical upper limits
  20. GRB 110402A: MITSuME Okayama and Ishigakijima Optical upper limits
  21. GRB / X-ray transient 110328A: MITSuME OkayamaOptical upper limits
  22. GRB110312A: MITSuME Okayama Optical upper limits
  23. GRB110305A: MITSuME Ishigakijima Optical upper limits
  24. GRB 110213A: MITSuME Akeno Optical Observation
  25. GRB110213A: MITSuME Okayama Optical Observation
  26. GRB110212A: MITSuME Okayama optical upper limits
  27. GRB110205A: MITSuME Ishigakijima Optical Observation
  28. GRB110205A: MITSuME Okayama Optical Observation
  29. GRB110201A: MITSuME Okayama optical upper limits
  30. GRB110128A: MITSuME Okayama optical upper limits
  31. GRB110119A: MITSuME Okayama optical upper limits
  32. GRB 110112A: MITSuME Akeno and Okayama optical upper limits
  33. GRB 110106A: MITSuME Okayama optical upper limits
  34. GRB110102A: MITSuME Okayama Optical Observation
  35. GRB101224A: MITSuME Okayama optical upper limits
  36. GRB 101219A: MITSuME Ishigakijima Optical upper limits
  37. GRB101017A: MITSuME Okayama optical upper limits
  38. GRB100925A/MAXI J1659-152 MITSuME Ishigakijima and Okayama Optical Observation
  39. GRB100915A: MITSuME Ishigakijima Optical upper limits
  40. GRB100909A: MITSuME Ishigakijima Optical upper limits
  41. GRB100901A: IAO optical upper limits at 4 days after the burst
  42. GRB100906A: Optical observations at IAO
  43. GRB100906A: Errata of MITSuME Okayama about observation time
  44. GRB100906A: MITSuME Okayama Optical Observation
  45. GRB100905A: Optical upper limits at IAO
  46. GRB100905A: MITSuME Okayama optical upper limits
  47. GRB10901A: Murikabushi telescope observation at 3 days after the burst
  48. GRB100902A: Optical upper limits at IAO
  49. GRB10901A: Optical observations at IAO
  50. GRB 100901A: optical observation at Mt.Terskol
  51. GRB100901A: MITSuME Okayama Optical Observation at 1 day after the burst
  52. GRB100901A: Errata of MITSuME Okayama about reference catalog
  53. GRB100901A: MITSuME Okayama Optical Observation
  54. GRB100816A: MITSuME optical upper limits
  55. GRB100807A: MITSuME optical upper limits
  56. GRB100802A: MITSuME optical upper limits
  57. GRB100725B: MITSuME optical upper limits
  58. GRB 100513A: MITSuME Akeno Optical Observation
  59. GRB100504A: Optical upper limits at IAO
  60. GRB100424A: MITSuME optical upper limits
  61. GRB100423A: MITSuME optical upper limits
  62. GRB100420A: MITSuME optical upper limits
  63. GRB100305A: Optical upper limits at IAO
  64. GRB100219A Akeno and Okayama MITSuME Optical Observation
  65. GRB100206: MITSuME optical upper limits
  66. GRB 091208B: MITSuME Akeno Optical Observation
  67. GRB 091208B: MITSuME Okayama Optical Observation
  68. GRB 090831B: MITSuME optical upper limits
  69. GRB 090807: MITSuME optical upper limit
  70. GRB 090529: MITSuME optical observation
  71. GRB 090426: Near infrared observation with ISLE at OAO
  72. GRB 090426: Okayama MITSuME optical observation
  73. GRB 090423: Near infrared observation at Okayama Observatory
  74. GRB 090418: Erratum in GCN 9168
  75. GRB 090418: Optical observations with MITSuME Okayama and Ishigaki 1m telescope
  76. GRB 090417B: MITSuME Okayama optical upper limits
  77. GRB 090410: MITSuME optical upper limits
  78. GRB 090401B: Upper limits of MITSuME optical observation
  79. GRB 090313: MITSuME Okayama observation
  80. GRB 081222: MITSuME optical observation
  81. GRB081203A: MITSuME optical observation
  82. GRB 080905A: MITSuME Akeno optical upper limits
  83. GRB080810: MITSuME optical observation
  84. GRB 080710: Optical observation with MITSuME Okayama
  85. GRB 080702A: MITSuME Akeno optical upper limits
  86. GRB080613B: MITSuME upper limits
  87. GRB080613A: Optical upper limits with Okayama MITSuME telescope
  88. GRB080605: optical observation with the MITSuME-OAO telescope
  89. GRB 080604: MITSuME Okayama observation
  90. GRB 080503: MITSuME Ishigakijima optical upper limits
  91. GRB 080503: MITSuME Akeno optical upper limits
  92. GRB 080325: MITSuME Akeno optical upper limits
  93. GRB080310 : Optical observations by LOAO and Lulin
  94. GRB080310: Optical observation by MITSuME telescope
  95. GRB080307: Optical upper limits
  96. GRB080229: Possible optical afterglow
  97. GRB080212: Optical afterglow candidate observed by MITSuME Telescope
  98. GRB071118 MITSuME OAO optical observation
  99. GRB071112C: Errata of MITSuME Ic band photometry
  100. GRB 071112C MITSuME Akeno early optical observation

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