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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"

32719 results found.

  1. GRB 080625: Swift/UVOT Detection of an Optical Afterglow
  2. GRB 080625: Observations at OSN
  3. GRB 080623: GROND upper limits
  4. GRB080623: Swift UVOT followup observations
  5. GRB 080623: Swift-XRT refined analysis
  6. GRB 080623, Swift-BAT refined analysis
  7. GRB 080623: Swift/UVOT Non-Detection of an Optical Afterglow
  8. Swift trigger 314975 is not a GRB
  9. GRB080607: optical observation
  10. GRB 080603b: optical observation
  11. GRB 070809: Putative host galaxy and redshift
  12. VLA upper limit on INTEGRAL burst GRB 080613A
  13. GRB 0800603A: optical observation
  14. GRB080613B: MITSuME upper limits
  15. GRB080613A: Optical upper limits with Okayama MITSuME telescope
  16. Konus-Wind observation of GRB 080613B
  17. GRB 080603A: optical observations on June 04
  18. GRB 080613A: Swift-XRT detection of the afterglow
  19. GRB080613A: Swift/UVOT Upper Limits
  20. GRB 080613A: GROND Confirmation of the Afterglow Candidate
  21. GRB 080613B: GROND Upper Limits
  22. GRB 080613B - NOT optical and IR nondetections
  23. GRB080613B: Swift/UVOT Upper Limits
  24. GRB 080613B, Swift-BAT refined analysis
  25. GRB 080613B: Swift-XRT refined analysis
  26. GRB 080514B: Spectroscopic constraints and probable host galaxy
  27. GRB 080613: Faulkes Telescope North optical candidate
  28. GRB 080603A: Late-time Keck imaging and spectroscopy
  29. GRB 080603b: optical observation
  30. Swift observations of BAT Slew Survey event (Trigger=010)
  31. GRB 080603A: final Swift-XRT observations.
  32. GRB 080607: AGILE-MCAL observation of the prompt emission
  33. GRB 080603B - TLS 2nd Epoch: Another Break
  34. GRB 080605: TLS 3rd Epoch - Source Confusion
  35. GRB080605: optical observation with the MITSuME-OAO telescope
  36. Konus-Wind observation of GRB 080607
  37. GRB080607: RTT150 optical observations
  38. GRB 080603A: optical observations
  39. GRB 080607: Swift-XRT refined analysis
  40. Swift/UVOT Observations of GRB080607
  41. GRB 080605: optical observations
  42. GRB 080607 KAIT observations
  43. VLA detection of INTEGRAL burst GRB 080603A
  44. Konus-Wind observation of GRB 080605
  45. GRB 080607, Swift-BAT refined analysis
  46. GRB 080605: GROND 2nd epoch observations
  47. GRB 080607 - PAIRITEL NIR detection
  48. GRB 080607: Keck/LRIS spectroscopy and redshift
  49. GRB 080607: Super-LOTIS early observations
  50. GRB 080607: ROTSE-III Detection of Optical Counterpart
  51. GRB 080605: TLS RRM Analysis, Plateau/Rebrightening, Red OT
  52. GRB 080605: Swift-UVOT refined analysis
  53. Possible VLA radio detection on INTEGRAL burst GRB 080603A
  54. GRB 080604: VLA radio upper limit
  55. GRB 080605, Swift-BAT refined analysis
  56. GRB 080603B: VLA radio upper limit
  57. GRB 080605, Swift-BAT refined analysis
  58. GRB 080605: Swift-XRT refined analysis
  59. GRB080605: observation by BOOTES
  60. GRB 080605: MASTER VWF 46 s AT observation
  61. GRB 080605: GROND detection of the optical afterglow candidate
  62. GRB080605: optical observations
  63. GRB 080605: VLT redshift
  64. GRB 080605: Swift/UVOT Position of the Optical Afterglow
  65. GRB 080605: TLS RRM Afterglow
  66. GRB 080603B: PAIRITEL infrared detection
  67. GRB 080603A: PAIRITEL infrared detection
  68. GRB 080604: Xinglong R band observation
  69. GRB 080603A: Xinglong R band observation
  70. GRB 080603B: TLS Afterglow Observation
  71. GRB 080603A: TLS Afterglow Observation
  72. Swift/UVOT observations of GRB080604
  73. GRB080604: HET redshift retraction
  74. GRB 080604: Gemini-North spectroscopy
  75. GRB 080604, Swift-BAT refined analysis
  76. GRB 080604: Swift-XRT refined analysis
  77. GRB 080603B: Hobby-Eberly Telescope redshift confirmation
  78. GRB 080603B : Xinglong EST observations
  79. GRB 080603B : Liverpool Telescope Observations
  80. Konus-Wind observation of GRB 080603B
  81. GRB 080603B: Swift-XRT refined analysis
  82. GRB 080603A: Swift-XRT detection of the afterglow
  83. GRB 080430: optical observations
  84. GRB 080603B: Swift/UVOT detection of the afterglow
  85. GRB 080603B, Swift-BAT refined analysis
  86. GRB 080604: Hobby-Eberly Telescope spectroscopy
  87. GRB 080603A: Swift/UVOT detection of the afterglow
  88. GRB080603B: RTT150 optical observations, break in light curves
  89. GRB 080604: Early Super-LOTIS Observations
  90. GRB080604: confirmation of optical afterglow
  91. GRB080603B: NOT redshift
  92. GRB 080603B: BOOTES2/TELMA optical observations
  93. GRB080603: Super-LOTIS detection of Optical Counterpart
  94. GRB 080603B: ROTSE-III Detection of Optical Counterpart
  95. GRB 080603: Gemini-North redshift
  96. GRB 080602, Swift-BAT refined analysis
  97. GRB 080602: Swift-XRT refined analysis
  98. Konus-Wind observation of GRB 080602
  99. GRB 080602: NOT R-band upper limit
  100. Swift analysis of BAT Slew Survey event (Trigger=009)

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