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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"

16034 results found.

  1. GCN 060707: Swift-UVOT observations
  2. GRB 060707: Swift-XRT refined analysis
  3. GRB060707 possible optical confirmation
  4. GRB 060707: BOOTES-IR optical afterglow candidate
  5. GRB 060707: BOOTES-IR optical observation
  6. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  7. GRB060614: Detection of the host galaxy but no supernova emission
  8. GRB060614: Optical observations
  9. GRB060512: near IR observations
  10. GRB060526: optical observations
  11. GRB060605: optical observation
  12. The Unusually Long-Lived Afterglow of GRB 060614
  13. GRB 060614: optical observations
  14. GRB 060605, optical observations
  15. GRB 060614, SMARTS optical/IR afterglow observation
  16. GRB 060614: Swift/UVOT Observations
  17. GRB 060604, optical observations
  18. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart
  19. GRB 060607: RTT150 optical observations
  20. GRB 070706B: Watcher upper limit
  21. GRB060602A: Swift/UVOT upper limits
  22. GCN 060607: Swift-UVOT obswervations.
  23. GRB 060607: optical limit by "Pi of the Sky"
  24. GRB 060502B: A Bright Early-type Galaxy as Putative Host of the Short Burst
  25. GRB 060607: PROMPT Observations
  26. GRB 060605: RTT150 optical observations
  27. GRB 060607: Swift detection of a burst with bright optical counterpart
  28. GRB 060522: PROMPT Optical Limits
  29. GRB 060605: Xinglong TNT optical observations
  30. GRB060605: Swift/UVOT detections
  31. GRB 060605: Swift-XRT Team refined analysis
  32. GRB 060605: TNG optical observations
  33. GRB 060605: RTT150 optical observations
  34. GRB 060605: ROTSE-III Optical Counterpart
  35. GRB 060605: Swift detection of a burst with optical counterpart
  36. GRB 060605: ROTSE-III Detection of Optical Counterpart
  37. GRB 060604: redshift
  38. GRB 060512: Keck Redshift
  39. GRB 060604 optical photometry
  40. GRB 060604A: ROTSE-III Optical Limits
  41. GRB 060604: Swift detection of a burst with possible optical counterpart
  42. GRB 060602B: RTT150 optical observations
  43. GRB 060211A : WIDGET simultaneous optical observations
  44. GRB060602A: optical observations(/transient?)
  45. GRB 060526: Tautenburg Second Epoch Observations
  46. GRB 060502A: Optical afterglow observations
  47. GRB 060526: Break in X-ray light curve
  48. GRB 060526: RTT150 optical observations
  49. GRB060526, optical observations
  50. GRB 051227 : WIDGET simultaneous optical observations
  51. GRB 051028 : WIDGET pre-trigger limit
  52. GRB 060526: RTT150 optical observations
  53. GRB 060526: Multiple Optical Flares
  54. GRB060526: afterglow fitting and probable jet break
  55. GRB 060526: RTT150 optical observations
  56. GRB060526: Optical counterpart from MIRO
  57. GRB060502b: optical observations
  58. GRB 060526: RTT150 optical observations
  59. GRB060526: optical observations
  60. GRB 060526: SMARTS optical/IR afterglow observations
  61. GRB060526: possible break in the optical light curve
  62. GRB 060526: REM observations
  63. GRB 060526: RTT150 optical observations, afterglow flattening
  64. GRB 060526: Optical Flare
  65. GRB 060526: RTT150 optical observations
  66. GRB060526: Further Swift-UVOT Observations
  67. GRB060526, optical observations
  68. GRB 060526: Magellan Redshift
  69. GRB 060526 Lulin optical observation
  70. GRB 060526: TNG optical observations
  71. GRB 060526: ROTSE-III Observations of Optical Counterpart
  72. GRB 060526: Swift detection of a burst with x-ray and optical afterglow
  73. GRB060505: VLT observations of the optical afterglow
  74. GRB 060413 : WIDGET simultaneous optical observations
  75. GRB 060522: Swift/UVOT Observations: Correction
  76. GRB 060522: Swift/UVOT Observations of the Optical Afterglow
  77. XMM-Newton observation of GRB060510b
  78. GRB060512: Late-Time P200 Observations
  79. GRB 060522: Swift/XRT Team refined analysis
  80. GRB 060522: REM NIR observations
  81. GRB 060522: TNG optical observations
  82. GRB 060522: Swift detection of a burst with possible optical afterglow
  83. GRB 060512: reanalysis of optical spectra
  84. GRB 060210: Jet Break in the XRT light curve
  85. GRB 060512: TNG optical spectroscopy
  86. GRB 060512: TAROT optical observation
  87. GRB 060515: Swift/XRT Team refined analysis
  88. GRB 060515: Super-LOTIS Observations
  89. GRB 060515: TAROT optical observation
  90. GRB 060515: ROTSE-III Optical Limits
  91. VLT optical spectroscopy of GRB 060512
  92. Swift/UVOT observations of GRB060512.
  93. GRB060512: Swift XRT Team refined analysis
  94. GRB 060512: 1.54m Kuiper Observations
  95. GRB 060512: optical decay
  96. GRB 060512: REM NIR observations
  97. GRB 060512: Swift detection of a burst with an optical afterglow
  98. GRB 060510A: Swift/UVOT Detection of an Optical Afterglow
  99. GRB060418: optical observations
  100. GRB 060428a, SMARTS optical/IR afterglow detection

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