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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"

28098 results found.

  1. GRB 060807: Kanazawa R-band observation
  2. GRB 060807: Swift detection of a burst
  3. GRB060805 Liverpool Telescope observations
  4. GRB 060805: XRT Team Refined Analysis
  5. GRB 060805: Swift-BAT Refined Analysis
  6. GRB 060805: Swift/UVOT Upper Limits
  7. GRB 060805: P60 Observations
  8. GRB 060805 - SDSS Pre-Burst Observations
  9. GRB 060804: Swift UVOT observations
  10. GRB 060804: Swift-XRT Team Refined Analysis
  11. GRB 060804: Refined analysis of the Swift-BAT burst
  12. GRB 060804: Swift detection of a burst with a possible UVOT counterpart
  13. GRB 060728: Upper limits of the X-ray emission
  14. GRB 060801: no variability of optical sources
  15. GRB 060801: XRT/SDSS Frame Offset and Refined XRT Position
  16. GRB060801: Radio Observations
  17. GRB 051109B: Bright spiral host galaxy at low redshift
  18. GRB060801: Swift/UVOT Upper Limits
  19. GRB 060801: optical observations at Hanle and Calar Alto
  20. GRB 060801: Refined analysis of the Swift-BAT short hard burst
  21. GRB 060801, optical observation
  22. GRB 060801: Kanazawa Optical Observation
  23. GRB 060719: TORTOREM optical upper limits
  24. GRB 060729: Refined analysis of the Swift-BAT burst
  25. GRB 060729: Swift-XRT refined analysis
  26. GRB 060729: Swift/UVOT Observations
  27. GRB 060729: Swift detection of a burst with an UVOT optical counterpart
  28. GRB 060728: Swift/UVOT Upper Limits
  29. GRB 060728, SMARTS optical/IR observations
  30. Swift/XRT preliminary analysis
  31. GRB 060728: Swift detection of a burst
  32. GRB 060714: Swift/UVOT Observations
  33. GRB060719: prompt NIR observations with REM
  34. GRB 060714: NOT observations
  35. GRB 060719: near-infrared afterglow
  36. GRB 060719: correction to the coordinates reported in GCN 5347
  37. GRB 060522: VLA observation
  38. GRB 060719: Swift/UVOT Upper Limits
  39. GRB 060719: VLT/ISAAC observations
  40. GRB 060719: Refined analysis of the Swift-BAT burst
  41. GRB 060719: XRT refined analysis
  42. GRB 060719: further analysis of VLT observations
  43. GRB060719: REM NIR Observations
  44. GRB 060719: VLT observations
  45. GRB 060719: LCO optical observations
  46. GRB 060719: Swift detection of a burst
  47. GRB 060717: Swift XRT refined analysis
  48. GRB 060714: Refined analysis of the Swift-BAT burst
  49. GRB060717: Swift/UVOT upper limits
  50. GRB 060717: Swift-BAT refined analysis
  51. GRB060717 - SDSS Pre-burst Observations
  52. GRB 060714: REM infrared observations
  53. GRB 060717, optical observation
  54. GRB 060714 : Liverpool Telescope Observations
  55. GRB 060714: Swift XRT refined analysis
  56. GRB 060708: VLT spectroscopy
  57. Swift trigger 219136 is probably not a GRB
  58. GRB 060714, optical observation
  59. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  60. GRB060712: P60 Observations
  61. GRB 060712: XRT refined analysis
  62. GRB 060712: Swift/UVOT Upper Limits
  63. GRB060526: optical observations
  64. GRB 060712: XRT refined position
  65. GRB 060712: Refined analysis of the Swift-BAT burst
  66. Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
  67. GRB 060707: OA fading and redshift
  68. GRB 060708: Swift-XRT refined analysis
  69. GCN 060708: Swift-UVOT Observations
  70. GRB 060708: Refined analysis of the Swift-BAT burst
  71. GCN 060707: Swift-UVOT observations
  72. GRB 060707: Swift-XRT refined analysis
  73. GRB 060708: Swift detection of a burst with an UVOT countpart
  74. GRB 060707: Refined analysis of the Swift-BAT burst
  75. GRB 060707: BOOTES-IR optical observation
  76. GRB 060515: Upper Limit on Host Galaxy
  77. GRB 060614: SMARTS host galaxy observations
  78. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  79. GRB 060109: Upper Limit on Host Galaxy
  80. GRB 060105: Upper limit on Host Galaxy
  81. GRB 060614: Redshift
  82. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  83. GRB050326: Host Galaxy Candidates
  84. GRB050124: Possible Host Galaxy
  85. GRB050223: Host Galaxy
  86. Konus-Wind observation of GRB 060614
  87. GRB060605: optical observation
  88. GRB 060614: optical observations
  89. GRB 060605, optical observations
  90. GRB 060614: Swift-BAT refined analysis
  91. GRB 060614: Swift/UVOT Observations
  92. GRB060614: Swift-XRT refined analysis
  93. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart
  94. GRB 060602A: Swift/XRT analysis
  95. BAT Trigger #214277 is SGR 1900+14
  96. GRB 060610: KAIT observations
  97. GRB 060607: RTT150 optical observations
  98. GRB 060607B: Swift-BAT Refined Analysis
  99. GRB060602A: Swift/UVOT upper limits
  100. GRB 060607B: Swift detection of a burst

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