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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"

23704 results found.

  1. GRB 101023A: Swift detection of a burst
  2. GRB 101011A: miniTAO/ANIR NIR upper limits
  3. GRB 101020A: MASTER prompt and afterglow limit
  4. GRB 101020A: MASTER polarization optical observations
  5. GRB 101020A, Swift-BAT refined analysis
  6. GRB 101020A: Swift detection of a burst
  7. GRB 101017A: miniTAO/ANIR NIR upper limits
  8. GRB 101017A: Swift XRT refined analysis
  9. GRB 101017A: Swift/UVOT Observations
  10. GRB101017A: MITSuME Okayama optical upper limits
  11. Konus-Wind observation of GRB 101017A
  12. GRB 101017A: Swift-BAT refined analysis
  13. GRB 101017A: ROTSE-III Optical Limits
  14. GRB 101017A: Swift detection of a burst with optical counterpart
  15. GRB 101011A: Fermi GBM detection
  16. GRB 101011A: BOOTES-3 Upper Limit
  17. Konus-Wind observation of GRB 101014A
  18. GRB 101014A: Fermi GBM detection
  19. GRB 101011A: Swift/UVOT observations
  20. GRB 101011A, GROND upper limits
  21. GRB 101011A: Zadko observatory - Gingin optical observations
  22. GRB 101011A: Swift/UVOT Observations of a Possible Optical Afterglow
  23. GRB 101011A: Swift-BAT refined analysis
  24. GRB 101011A: Swift detection of a burst
  25. GRB 101008A: Fermi GBM observation
  26. GRB 101008A: MASTER prompt optical observations (correction to GCN#11328)
  27. GRB 101008A: MASTER prompt optical observations
  28. GRB 101008A: Swift-BAT refined analysis
  29. GRB101008A, GROND detection of a fading afterglow
  30. GRB 101008A: Swift/XRT Detection of an Afterglow with no UVOT Counterpart
  31. GRB 101008A: Swift detection of a burst
  32. GRB 100925A / MAXI J1659-152: MASTER optical observations
  33. GRB 100924A: Suzaku WAM observation of the prompt emission
  34. GRB 100928A, Swift-BAT refined analysis
  35. GRB 100928A: Swift detection of a burst
  36. GRB 100925A / MAXI J1659-152: Optical observation with the Kottamia 188cm telescope
  37. GRB100925A/MAXI J1659-152 MITSuME Ishigakijima and Okayama Optical Observation
  38. GRB 100925A/MAXI J1659-152: Submm observations from APEX
  39. GRB 100925A / MAXI J1659-152: BOOTES-2/TELMA and IAC80 optical observations
  40. MAXI J1659-152: Swift-BAT refined analysis (triggers 434928 and 434931)
  41. GRB 100924A: GROND detection of an optical/NIR afterglow
  42. GRB 100924A: Swift-BAT refined analysis
  43. GRB 100917A: TAROT La Silla observatory optical observations
  44. GRB 100915A: TAROT Calern observatory optical observations
  45. GRB 100917A: Swift-BAT refined analysis
  46. GRB 100917A: Swift detection of a burst
  47. GRB100915A: MITSuME Ishigakijima Optical upper limits
  48. GRB 100915A: Swift/UVOT Upper Limits
  49. GRB 100915A: Swift-BAT refined analysis
  50. GRB 100915A: Swift-XRT refined analysis
  51. GRB 100915B: a long GRB detected by INTEGRAL
  52. GRB 100915A: Swift detection of a likely burst
  53. GRB 100910A: Fermi GBM detection
  54. Swift BAT Trigger 433953 probably not a GRB
  55. GRB100909A: MITSuME Ishigakijima Optical upper limits
  56. GRB 100909A: Swift/UVOT observations
  57. GRB 100901A: optical observations in Mondy and R-light curve
  58. GRB 100909A: Swift-XRT refined analysis
  59. GRB 100906A: optical observations at Mt.Terskol
  60. GRB 100901A: optical observation in Maidanak, break confirmation
  61. GRB 100902A : Confirmation of afterglow and re-brightening with CFHT r’-band imaging
  62. GRB 100909A: Swift target of opportunity observation
  63. GRB 100909A: a long GRB detected by INTEGRAL
  64. GRB100901A: IAO optical upper limits at 4 days after the burst
  65. GRB 100901A: Confirmation of WSRT Radio Detection
  66. GRB 100906A: RTT150 optical observations
  67. Konus-Wind observation of GRB 100906A
  68. GRB100906A: Optical observations at IAO
  69. GRB 100906A: Swift/UVOT Observations
  70. GRB100906A: Errata of MITSuME Okayama about observation time
  71. GRB100906A: MITSuME Okayama Optical Observation
  72. GRB 100905A: Swift/UVOT Upper Limits
  73. GRB 100906A: MASTER preliminary prompt+afterglow lc
  74. GRB 100901A: ISON-NM optical observations
  75. GRB 100906A: Swift-BAT refined analysis
  76. GRB 100906A: MASTER preliminary polarization prompt light curve
  77. GRB 100906A: MASTER early OT observations
  78. GRB 100906A: Swift detection of a burst with an optical afterglow
  79. GRB 100829A: MASTER optical observations
  80. GRB100905A: Optical upper limits at IAO
  81. GRB100905A: MITSuME Okayama optical upper limits
  82. GRB 100905A: Swift-BAT refined analysis
  83. GRB 100905A: MASTER Prompt Optical Observations
  84. GRB 100905A: Swift detection of a burst
  85. Optical observations of GRB 100901A
  86. GRB10901A: Murikabushi telescope observation at 3 days after the burst
  87. GRB 100904A: Swift-BAT refined analysis
  88. GRB100902A: Optical upper limits at IAO
  89. GRB10901A: Optical observations at IAO
  90. Konus-Wind observation of GRB 100829A
  91. GRB 100904A: Swift detection of a burst
  92. GRB 100902A: Swift-BAT refined analysis
  93. GRB 100901A: optical observation at Mt.Terskol
  94. GRB 100901A: multicolor photometry at Mt.Terskol
  95. IPN Triangulation of the very bright GRB 100829A
  96. GRB 100902A: optical observation at Mt.Terskol
  97. GRB 100901A: optical observation at Mt.Terskol
  98. GRB 100901A: Kanata Telescope observation of the optical afterglow
  99. GRB100901A: MITSuME Okayama Optical Observation at 1 day after the burst
  100. GRB 100902A: Enhanced Swift-XRT position

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