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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"

32757 results found.

  1. GRB 060105: Upper limit on Host Galaxy
  2. GRB060614: Detection of the host galaxy but no supernova emission
  3. GRB 060614: redshift confirmation
  4. GRB 060614: Redshift
  5. Swift-BAT trigger 215279 is not a GRB
  6. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  7. GRB060614: Optical observations
  8. GRB 060614: spectroscopy
  9. GRB050326: Host Galaxy Candidates
  10. GRB050124: Possible Host Galaxy
  11. GRB050223: Host Galaxy
  12. GRB060512: near IR observations
  13. Konus-Wind observation of GRB 060614
  14. GRB060605: optical observation
  15. The Unusually Long-Lived Afterglow of GRB 060614
  16. GRB 060614: optical observations
  17. GRB 060605, optical observations
  18. GRB 060614, SMARTS optical/IR afterglow observation
  19. GRB060614: SSO 1m observations
  20. GRB060614: Watcher observation
  21. GRB 060614: Swift-BAT refined analysis
  22. GRB 060614: Swift/UVOT Observations
  23. GRB060614: Swift-XRT refined analysis
  24. GRB 060604, optical observations
  25. GRB 060602A: Swift/XRT analysis
  26. BAT Trigger #214277 is SGR 1900+14
  27. GRB 070706B: Watcher upper limit
  28. GRB 060607B: Swift-BAT Refined Analysis
  29. GRB060602A: Swift/UVOT upper limits
  30. GCN 060607: Swift-UVOT obswervations.
  31. GRB 060607: Swift-BAT Refined Analysis
  32. GRB 060607: Swift-XRT Team refined analysis
  33. GRB 060607: IR observations
  34. GRB 060502B: A Bright Early-type Galaxy as Putative Host of the Short Burst
  35. VLT/UVES observations of GRB 060607
  36. GRB 060607: PROMPT Observations
  37. GRB 060607: REM NIR afterglow
  38. GRB 060522: PROMPT Optical Limits
  39. GRB 060605 BAT refined analysis
  40. GRB 060605: Xinglong TNT optical observations
  41. GRB060602B : REM infrared observations
  42. GRB060605: Swift/UVOT detections
  43. GRB 060605: Swift-XRT Team refined analysis
  44. SALT spectroscopy of GRB 060605
  45. GRB 060605: TNG optical observations
  46. GRB 060605: RTT150 optical observations
  47. GRB060605: Spectral Observations and Redshift
  48. GRB 060605: ROTSE-III Optical Counterpart
  49. GRB 060605: ROTSE-III Detection of Optical Counterpart
  50. GRB060604: Swift/UVOT detections
  51. GRB 060604: redshift
  52. GRB 060512: Keck Redshift
  53. GRB 060604 optical photometry
  54. GRB 060604: Swift-XRT Team refined analysis
  55. GRB 060604: BAT refined analysis
  56. GRB 060604A: ROTSE-III Optical Limits
  57. GRB 060602A: Swift-BAT Refined Analysis: Correction
  58. GRB 060602B: XMM-Newton Survey Source
  59. GRB 060602B: Swift-XRT Refined Analysis
  60. GRB 060602B: Swift-BAT Refined Analysis
  61. GRB 060602B: Swift/UVOT observations
  62. GRB 060602A: Swift-BAT Refined Analysis
  63. GRB 060211A : WIDGET simultaneous optical observations
  64. GRB060602A: optical observations(/transient?)
  65. GRB 060526: Tautenburg Second Epoch Observations
  66. GRB060602A: Bootes-IR observations
  67. GRB 060602B: Swift detection of a burst
  68. GRB060602B: Watcher observations - no OT candidate
  69. GRB060602B: BOOTES-IR candidate afterglow
  70. GRB 060502A: Optical afterglow observations
  71. GRB 060526: Break in X-ray light curve
  72. GRB 060526: RTT150 optical observations
  73. GRB060526, optical observations
  74. GRB 051227 : WIDGET simultaneous optical observations
  75. GRB 051028 : WIDGET pre-trigger limit
  76. GRB 060526: RTT150 optical observations
  77. GRB 060526: Multiple Optical Flares
  78. GRB060526: afterglow fitting and probable jet break
  79. GRB 060526: RTT150 optical observations
  80. GRB060526: Optical counterpart from MIRO
  81. GRB060502b: optical observations
  82. GRB 060526: RTT150 optical observations
  83. GRB 060526: Tautenburg OT observation and light curve fitting
  84. GRB060526: optical observations
  85. GRB 060526: SMARTS optical/IR afterglow observations
  86. GRB060526: possible break in the optical light curve
  87. GRB 060526: REM observations
  88. GRB 060526: RTT150 optical observations, afterglow flattening
  89. GRB 060526: Optical Flare
  90. GRB 060526: MDM-2.4m Observations
  91. GRB 060526: Refined analysis of the Swift-BAT burst
  92. GRB 060526: RTT150 optical observations
  93. GRB060526: Further Swift-UVOT Observations
  94. GRB 060526: Magellan Redshift
  95. GRB 060526: Swift/XRT Team refined analysis
  96. GRB 060526: TNG optical observations
  97. GRB 060526: ROTSE-III Observations of Optical Counterpart
  98. GRB 060526: Watcher Observations
  99. GRB060526 - SDSS Pre-burst Observations
  100. GRB 060526: Continued emission for the Swift burst

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