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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"

32756 results found.

  1. GRB060614: Detection of the host galaxy but no supernova emission
  2. GRB 060614: redshift confirmation
  3. GRB 060614: Redshift
  4. Swift-BAT trigger 215279 is not a GRB
  5. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  6. GRB060614: Optical observations
  7. GRB 060614: spectroscopy
  8. GRB050326: Host Galaxy Candidates
  9. GRB050124: Possible Host Galaxy
  10. GRB050223: Host Galaxy
  11. GRB060512: near IR observations
  12. Konus-Wind observation of GRB 060614
  13. GRB060605: optical observation
  14. The Unusually Long-Lived Afterglow of GRB 060614
  15. GRB 060614: optical observations
  16. GRB 060605, optical observations
  17. GRB 060614, SMARTS optical/IR afterglow observation
  18. GRB060614: SSO 1m observations
  19. GRB060614: Watcher observation
  20. GRB 060614: Swift-BAT refined analysis
  21. GRB 060614: Swift/UVOT Observations
  22. GRB060614: Swift-XRT refined analysis
  23. GRB 060604, optical observations
  24. GRB 060602A: Swift/XRT analysis
  25. BAT Trigger #214277 is SGR 1900+14
  26. GRB 070706B: Watcher upper limit
  27. GRB 060607B: Swift-BAT Refined Analysis
  28. GRB060602A: Swift/UVOT upper limits
  29. GCN 060607: Swift-UVOT obswervations.
  30. GRB 060607: Swift-BAT Refined Analysis
  31. GRB 060607: Swift-XRT Team refined analysis
  32. GRB 060607: IR observations
  33. GRB 060502B: A Bright Early-type Galaxy as Putative Host of the Short Burst
  34. VLT/UVES observations of GRB 060607
  35. GRB 060607: PROMPT Observations
  36. GRB 060607: REM NIR afterglow
  37. GRB 060522: PROMPT Optical Limits
  38. GRB 060605 BAT refined analysis
  39. GRB 060605: Xinglong TNT optical observations
  40. GRB060602B : REM infrared observations
  41. GRB060605: Swift/UVOT detections
  42. GRB 060605: Swift-XRT Team refined analysis
  43. SALT spectroscopy of GRB 060605
  44. GRB 060605: TNG optical observations
  45. GRB 060605: RTT150 optical observations
  46. GRB060605: Spectral Observations and Redshift
  47. GRB 060605: ROTSE-III Optical Counterpart
  48. GRB 060605: ROTSE-III Detection of Optical Counterpart
  49. GRB060604: Swift/UVOT detections
  50. GRB 060604: redshift
  51. GRB 060512: Keck Redshift
  52. GRB 060604 optical photometry
  53. GRB 060604: Swift-XRT Team refined analysis
  54. GRB 060604: BAT refined analysis
  55. GRB 060604A: ROTSE-III Optical Limits
  56. GRB 060602A: Swift-BAT Refined Analysis: Correction
  57. GRB 060602B: XMM-Newton Survey Source
  58. GRB 060602B: Swift-XRT Refined Analysis
  59. GRB 060602B: Swift-BAT Refined Analysis
  60. GRB 060602B: Swift/UVOT observations
  61. GRB 060602A: Swift-BAT Refined Analysis
  62. GRB 060211A : WIDGET simultaneous optical observations
  63. GRB060602A: optical observations(/transient?)
  64. GRB 060526: Tautenburg Second Epoch Observations
  65. GRB060602A: Bootes-IR observations
  66. GRB 060602B: Swift detection of a burst
  67. GRB060602B: Watcher observations - no OT candidate
  68. GRB060602B: BOOTES-IR candidate afterglow
  69. GRB 060502A: Optical afterglow observations
  70. GRB 060526: Break in X-ray light curve
  71. GRB 060526: RTT150 optical observations
  72. GRB060526, optical observations
  73. GRB 051227 : WIDGET simultaneous optical observations
  74. GRB 051028 : WIDGET pre-trigger limit
  75. GRB 060526: RTT150 optical observations
  76. GRB 060526: Multiple Optical Flares
  77. GRB060526: afterglow fitting and probable jet break
  78. GRB 060526: RTT150 optical observations
  79. GRB060526: Optical counterpart from MIRO
  80. GRB060502b: optical observations
  81. GRB 060526: RTT150 optical observations
  82. GRB 060526: Tautenburg OT observation and light curve fitting
  83. GRB060526: optical observations
  84. GRB 060526: SMARTS optical/IR afterglow observations
  85. GRB060526: possible break in the optical light curve
  86. GRB 060526: REM observations
  87. GRB 060526: RTT150 optical observations, afterglow flattening
  88. GRB 060526: Optical Flare
  89. GRB 060526: MDM-2.4m Observations
  90. GRB 060526: Refined analysis of the Swift-BAT burst
  91. GRB 060526: RTT150 optical observations
  92. GRB060526: Further Swift-UVOT Observations
  93. GRB 060526: Magellan Redshift
  94. GRB 060526: Swift/XRT Team refined analysis
  95. GRB 060526: TNG optical observations
  96. GRB 060526: ROTSE-III Observations of Optical Counterpart
  97. GRB 060526: Watcher Observations
  98. GRB060526 - SDSS Pre-burst Observations
  99. GRB 060526: Continued emission for the Swift burst
  100. GRB060505: VLT observations of the optical afterglow

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