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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. 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').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

12396 results found.

  1. GRB 101219A: MITSuME Ishigakijima Optical upper limits
  2. GRB 101219A: Swift/UVOT Upper Limits
  3. GRB 101219A: GROND Upper limits
  4. GRB 101219A: Further Gemini-South Imaging
  5. GRB 101219A - NOT observation - upper limit
  6. GRB 101219A: SARA-N Upper Limit
  7. XRF 101117A, RIMOTS optical upper limits
  8. GRB 101213A: Swift/UVOT Upper Limits
  9. GRB 101213A: Swift detection of a burst
  10. GRB 101201A: GROND Detection of the Optical/NIR Afterglow
  11. GRB 101123A: MASTER prompt optical observations
  12. Konus-Wind observation of GRB 101123A
  13. GRB 101117B: GROND Upper limits
  14. GRB 101117B: Swift/UVOT Observations of the Optical Afterglow
  15. GRB101114A: Swift/UVOT Upper Limits
  16. GRB 101117B: Swift detection of a burst
  17. XRF101117A: MAXI/GSC detection of a short X-ray transient
  18. GRB 101114A: GROND Upper limits
  19. GRB 101112A: optical observations
  20. GRB 10112A: MASTER optical observations
  21. GRB 101030A: GROND optical/NIR afterglow candidate
  22. GRB 101030A: Swift/UVOT Upper Limits
  23. GRB 101030A: Swift detection of a burst
  24. GRB 101024A: GROND optical/NIR observations
  25. GRB101024A: Swift/UVOT
  26. Swift/UVOT observations of GRB101023A
  27. GRB 101023A: Swift detection of a burst
  28. GRB 101011A: miniTAO/ANIR NIR upper limits
  29. GRB 101017A: miniTAO/ANIR NIR upper limits
  30. GRB 101017A: Swift/UVOT Observations
  31. GRB 101008A: correction to the GCN 11352
  32. GRB 101008A: optical observations
  33. GRB101017A: MITSuME Okayama optical upper limits
  34. GRB 101011A: BOOTES-3 Upper Limit
  35. GRB 101011A: Swift/UVOT observations
  36. GRB 101011A, GROND upper limits
  37. GRB 101011A: Swift/UVOT Observations of a Possible Optical Afterglow
  38. GRB 101011A: Swift detection of a burst
  39. GRB 100915 optical upper limit
  40. GRB 101008: Swift/UVOT Upper Limits
  41. GRB 101008A: Swift/XRT Detection of an Afterglow with no UVOT Counterpart
  42. Refined analysis shows Swift Trigger 435520 is not a GRB
  43. Swift Trigger 435520 is probably not a GRB
  44. GRB 100925A / MAXI J1659-152: WSRT Radio and Polarization Detection
  45. GRB100915A: MITSuME Ishigakijima Optical upper limits
  46. GRB 100915B: GRT Optical Observation
  47. GRB 100915A: GRT Optical Observation
  48. GRB 100915A: Swift/UVOT Upper Limits
  49. GRB 100915A: Swift detection of a likely burst
  50. GRB100909A: MITSuME Ishigakijima Optical upper limits
  51. GRB 100909A: Swift/UVOT observations
  52. GRB 100909A: Swift target of opportunity observation
  53. GRB100901A: IAO optical upper limits at 4 days after the burst
  54. GRB 100906A: Swift/UVOT Observations
  55. GRB 100905A: Swift/UVOT Upper Limits
  56. GRB100905A: Optical upper limits at IAO
  57. GRB100905A: MITSuME Okayama optical upper limits
  58. GRB100905A: 1.5m OSN upper limit
  59. GRB100904A: BOOTES-3 Upper Limit
  60. GRB 100905A: Swift detection of a burst
  61. GRB10901A: Murikabushi telescope observation at 3 days after the burst
  62. GRB100902A: Optical upper limits at IAO
  63. GRB 100902A: 1.5m OSN I-band Upper Limits
  64. GRB 100902A: Swift/UVOT Upper Limits
  65. GRB 100902A: optical observation at Mt.Terskol
  66. Swift/UVOT Observations of GRB100901A
  67. GRB100901A: MITSuME Okayama Optical Observation
  68. GRB 100823A: optical upper limit
  69. GRB 100814A: Maidanak optical observations
  70. GRB 100823A: optical observations
  71. GRB 100725B: Mondy optical upper limit
  72. GRB 100725B: Maidanak optical upper limit
  73. GRB100807A: R band observations
  74. GRB 100823A: Swift/UVOT Upper Limits
  75. GRB 100823A: Swift detection of a burst
  76. GRB100816A: MITSuME optical upper limits
  77. GRB 100816A: Swift UVOT Observations
  78. Swift/UVOT observations of GRB100814A
  79. GRB 100805A: optical observation in CrAO (correction to the GCN 11077 and second epoch)
  80. GRB100807A: optical observation in CrAO
  81. GRB 100805A: optical observation in CrAO
  82. GRB100807A: MITSuME optical upper limits
  83. GRB 100807A: Swift/UVOT Upper Limits
  84. GRB 100807A: Swift detection of a burst
  85. GRB 100805A: Swift/UVOT Observations of the Optical Afterglow
  86. GRB 100805A: GRAS 002 optical observations
  87. Trigger 430975: Swift detection of a possible burst
  88. GRB 100713A: second epoch Maidanak optical observation
  89. GRB 100713A: CrAO optical limits
  90. GRB100802A: MITSuME optical upper limits
  91. GRB 100802A: Swift/UVOT Possible Optical Afterglow
  92. GRB 100802A: Liverpool Telescope observations
  93. GRB 100802A: Swift detection of a burst
  94. GRB 100728B: Swift/UVOT Observations
  95. GRB 100728A: GROND Detection of the NIR Afterglow Candidate
  96. GRB 100727A: Swift/UVOT Upper Limits
  97. GRB 100728A: Swift/UVOT Upper Limits
  98. GRB 100728A: Swift detection of a burst
  99. GRB100727A: MOA optical upper limit
  100. GRB 100727A: Swift detection of a burst

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