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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"

18468 results found.

  1. GRB060805 Liverpool Telescope observations
  2. GRB 060805: Swift/UVOT Upper Limits
  3. GRB 060805: P60 Observations
  4. GRB 060805 - SDSS Pre-Burst Observations
  5. GRB 060804: Swift UVOT observations
  6. GRB 060728: Upper limits of the X-ray emission
  7. GRB 060801: no variability of optical sources
  8. GRB 060801: XRT/SDSS Frame Offset and Refined XRT Position
  9. GRB060801: Radio Observations
  10. GRB 051109B: Bright spiral host galaxy at low redshift
  11. GRB060801: Swift/UVOT Upper Limits
  12. GRB 060801: Refined analysis of the Swift-BAT short hard burst
  13. GRB 060801, optical observation
  14. GRB 060801: Kanazawa Optical Observation
  15. GRB 060719: TORTOREM optical upper limits
  16. GRB 060729: Swift/UVOT Observations
  17. GRB 060729: Swift detection of a burst with an UVOT optical counterpart
  18. GRB 060728: Swift/UVOT Upper Limits
  19. GRB 060728, SMARTS optical/IR observations
  20. Swift/XRT preliminary analysis
  21. GRB 060728: Swift detection of a burst
  22. GRB 060714: Swift/UVOT Observations
  23. GRB060719: prompt NIR observations with REM
  24. GRB 060714: NOT observations
  25. GRB 060719: near-infrared afterglow
  26. GRB 060522: VLA observation
  27. GRB 060719: Swift/UVOT Upper Limits
  28. GRB 060719: VLT/ISAAC observations
  29. GRB060719: REM NIR Observations
  30. GRB 060719: VLT observations
  31. GRB 060719: LCO optical observations
  32. GRB 060719: Swift detection of a burst
  33. GRB 060717 optical upper limit
  34. GRB060717: Swift/UVOT upper limits
  35. GRB060717 - SDSS Pre-burst Observations
  36. GRB 060714: REM infrared observations
  37. GRB 060717, optical observation
  38. GRB 060717: Swift detection of a burst
  39. GRB 060714 : Liverpool Telescope Observations
  40. GRB 060714: Swift XRT refined analysis
  41. GRB 060708: VLT spectroscopy
  42. Swift trigger 219136 is probably not a GRB
  43. GRB 060714, optical observation
  44. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  45. GRB060712: P60 Observations
  46. GRB 060712: Swift/UVOT Upper Limits
  47. GRB 060712: XRT refined position
  48. GRB 060712: Refined analysis of the Swift-BAT burst
  49. GRB 060707: OA fading and redshift
  50. GCN 060708: Swift-UVOT Observations
  51. GRB 060708: Refined analysis of the Swift-BAT burst
  52. GCN 060707: Swift-UVOT observations
  53. GRB 060708: Swift detection of a burst with an UVOT countpart
  54. GRB 060515: Upper Limit on Host Galaxy
  55. GRB 060109: Upper Limit on Host Galaxy
  56. GRB 060105: Upper limit on Host Galaxy
  57. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  58. GRB050326: Host Galaxy Candidates
  59. GRB050124: Possible Host Galaxy
  60. GRB050223: Host Galaxy
  61. GRB060605: optical observation
  62. GRB 060605, optical observations
  63. GRB 060614: Swift/UVOT Observations
  64. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart
  65. GRB 060602A: Swift/XRT analysis
  66. GRB 060610: KAIT observations
  67. GRB 060607: RTT150 optical observations
  68. GRB 060607B: Swift-BAT Refined Analysis
  69. GRB060602A: Swift/UVOT upper limits
  70. GRB 060607B: Swift detection of a burst
  71. GCN 060607: Swift-UVOT obswervations.
  72. GRB 060607: IR observations
  73. GRB 060605: RTT150 optical observations
  74. GRB 060607: REM NIR afterglow
  75. GRB 060607: Swift detection of a burst with bright optical counterpart
  76. GRB 060605: Xinglong TNT optical observations
  77. GRB060602B : REM infrared observations
  78. GRB060605: Swift/UVOT detections
  79. GRB 060605: RTT150 optical observations
  80. GRB060604: Swift/UVOT detections
  81. GRB 060604A: ROTSE-III Optical Limits
  82. GRB 060604: Swift detection of a burst with possible optical counterpart
  83. GRB 060602B: Swift/UVOT observations
  84. GRB060602A: optical observations(/transient?)
  85. GRB 060602B: Swift detection of a burst
  86. GRB060602 - SDSS Pre-Burst Observations
  87. GRB 060502A: Optical afterglow observations
  88. GRB060526, optical observations
  89. GRB 051227 : WIDGET simultaneous optical observations
  90. GRB 051028 : WIDGET pre-trigger limit
  91. GRB060526: Optical counterpart from MIRO
  92. GRB 060526: RTT150 optical observations
  93. GRB060526: optical observations
  94. GRB 060526: REM observations
  95. GRB 060526: RTT150 optical observations, afterglow flattening
  96. GRB 060526: RTT150 optical observations
  97. GRB060526, optical observations
  98. GRB 060526: Swift/XRT Team refined analysis
  99. GRB 060526: Watcher Observations
  100. GRB060526 - SDSS Pre-burst Observations

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