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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.

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

32757 results found.

  1. GRB 090107B: ROTSE-III Optical Limits
  2. Fermi/GBM detection of GRB 081226A
  3. GRB 090107: Swift-BAT refined analysis
  4. GRB 090102: optical decay
  5. VLA radio upper limit on GRB 090102
  6. GRB 090102: GRT Optical Observation
  7. Konus-Wind observation of GRB 090102
  8. GRB 090102: Hobby-Eberly Telescope Spectroscopy
  9. GRB 090102: P60 Imaging and P200 Spectroscopy
  10. GRB 090102 Observations from IAC80
  11. GRB 090102: GROND observations of the optical afterglow
  12. Swift UVOT observations of GRB 090102
  13. GRB 090102: Swift-BAT refined analysis
  14. GRB 090102: Swift XRT refined analysis
  15. GRB 090102: NOT redshift
  16. GRB 090102: TAROT Calern observatory optical light curve
  17. GRB 090102: REM observations of a bright afterglow
  18. GRB 081230: GROND confirmation of the afterglow
  19. GRB 081230, Swift-BAT refined analysis
  20. GRB081230: Swift-XRT refined analysis
  21. GRB 081230 Swift/UVOT Observations
  22. GRB 081230: Swift/UVOT Detection of an Optical Afterglow
  23. GRB 081230: ROTSE-III Detection of Optical Counterpart
  24. GRB 081228: GROND confirmation of the optical/NIR afterglow
  25. GRB 081226B: Fermi GBM observation
  26. GRB 081228, Swift-BAT refined analysis
  27. VLA radio detection of GRB 081221
  28. GRB 081228: Swift/UVOT Upper Limits
  29. GRB 081228: Swift-XRT Team refined analysis
  30. GRB 081228: detection by GROND
  31. VLA radio observation of GRB 081221
  32. GRB 081226B: Swift XRT and UVOT upper limits
  33. GRB 081224: Suzaku WAM observation of the prompt emission
  34. GRB 081226: Swift-XRT refined analysis
  35. GRB 081226A: Swift UVOT Upper Limits
  36. GRB 081226: Second epoch of Gemini-South imaging
  37. GRB 081226A: Swift-BAT refined analysis
  38. GRB 081226: Gemini-South imaging
  39. GRB 081226: GROND afterglow candidate
  40. GRB 081226: ROTSE-III Optical Limits
  41. GRB 080810: optical observations
  42. GRB 081211B: optical observations
  43. GRB081224: LAT retraction
  44. GRB 081224: Swift-XRT observation
  45. GRB 081222: MITSuME optical observation
  46. GRB 080810: optical observations
  47. Konus-Wind observation of GRB 081222
  48. GRB 081221: GROND observations
  49. GRB 081222: Gemini-N confirmation of redshift z=2.77
  50. GRB 081222:Optical afterglow observation
  51. VLA radio upper limit on GRB 081222
  52. GRB 081222: Fermi GBM observation
  53. GRB 081222: Gemini-South absorption redshift
  54. GRB081222: Swift/UVOT further observations
  55. GRB 081221: Probable host galaxy in Keck imaging
  56. GRB 081222, Swift-BAT refined analysis
  57. GRB 081221, Swift-BAT refined analysis
  58. Konus-Wind observation of very bright GRB 081215A
  59. GRB 081222: Swift XRT refined analysis
  60. GRB081221: Fermi GBM observation
  61. Swift/UVOT observations of GRB 081221
  62. IPN triangulation of bright GRB 081215A
  63. GRB 081221: Swift-XRT Refined Analysis
  64. GRB 081221: pseudo-redshift (pz=0.7) from the spectral parameters of the prompt emission
  65. GRB 081222: Faulkes Telescope South observations
  66. GRB 081221: Gemini-N nIR imaging
  67. GRB081222, optical observation
  68. GRB081222: Swift/UVOT detection of an optical afterglow
  69. GRB081203A: BTA observation
  70. Konus-Wind observation of GRB 081221
  71. GRB 081222: GROND Detection of the Optical/NIR Afterglow
  72. GRB 081221: further NOT observations
  73. GRB 081221: NOT observations
  74. GRB 081211B: Further Swift-XRT analysis
  75. GRB 081216: Suzaku WAM observation of the prompt emission
  76. GRB 081216 : Fermi GBM observation
  77. GRB 081215A: Fermi GBM detection
  78. GRB 081211B - possibly a short burst with extended emission
  79. GRB 081118: Zadko observations
  80. Fermi Trig Num 251059717 = SGR 0044+42: MASTER prompt optical observations
  81. GRB 081215A: Gamma Repeater?
  82. Possible GRB 081211B: Swift/UVOT Upper Limits
  83. GRB 081210: optical observations
  84. Possible GRB 081211B - Swift-XRT analysis
  85. GRB 081209: Fermi GBM detection
  86. GRB 081007: Detection of a Supernova
  87. GRB 081210: Xinglong TNT R band Upper Limits
  88. GRB 081210, SMARTS optical/IR observations
  89. GRB 081211: Swift-BAT refined analysis
  90. GRB 081211: Swift XRT refined analysis
  91. GRB 081211: Swift/UVOT detection of an optical afterglow
  92. GRB 081210: Swift/UVOT refined analysis
  93. GRB 081210: Swift-XRT refined analysis
  94. GRB081203B: optical observations
  95. GRB 081210: Swift-BAT refined analysis
  96. Konus-Wind observation of GRB 081209
  97. GRB 081203A: optical observations
  98. Radio observation of GRB 081121 with ATCA
  99. Radio observation of GRB 081118 with ATCA
  100. GRB 081128: afterglow observations

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