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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"

32769 results found.

  1. GRB 060708: Refined analysis of the Swift-BAT burst
  2. GCN 060707: Swift-UVOT observations
  3. GRB 060707: Swift-XRT refined analysis
  4. GRB060707 possible optical confirmation
  5. GRB 060707: Refined analysis of the Swift-BAT burst
  6. GRB060614: Possible SN Bump in UVOT U Band Light Curve
  7. GRB 060515: Upper Limit on Host Galaxy
  8. GRB 050223: Magellan redshift
  9. GRB 060614: SMARTS host galaxy observations
  10. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  11. Correction to GCN 5278 & GCN 5279 (GRBs 060105 & 060109)
  12. GRB 060109: Upper Limit on Host Galaxy
  13. GRB 060105: Upper limit on Host Galaxy
  14. GRB060614: Detection of the host galaxy but no supernova emission
  15. GRB 060614: redshift confirmation
  16. GRB 060614: Redshift
  17. Swift-BAT trigger 215279 is not a GRB
  18. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  19. GRB060614: Optical observations
  20. GRB 060614: spectroscopy
  21. GRB050326: Host Galaxy Candidates
  22. GRB050124: Possible Host Galaxy
  23. GRB050223: Host Galaxy
  24. GRB060512: near IR observations
  25. Konus-Wind observation of GRB 060614
  26. GRB060605: optical observation
  27. The Unusually Long-Lived Afterglow of GRB 060614
  28. GRB 060614: optical observations
  29. GRB 060605, optical observations
  30. GRB 060614, SMARTS optical/IR afterglow observation
  31. GRB060614: SSO 1m observations
  32. GRB060614: Watcher observation
  33. GRB 060614: Swift-BAT refined analysis
  34. GRB 060614: Swift/UVOT Observations
  35. GRB060614: Swift-XRT refined analysis
  36. GRB 060604, optical observations
  37. GRB 060602A: Swift/XRT analysis
  38. BAT Trigger #214277 is SGR 1900+14
  39. GRB 070706B: Watcher upper limit
  40. GRB 060607B: Swift-BAT Refined Analysis
  41. GRB060602A: Swift/UVOT upper limits
  42. GCN 060607: Swift-UVOT obswervations.
  43. GRB 060607: Swift-BAT Refined Analysis
  44. GRB 060607: Swift-XRT Team refined analysis
  45. GRB 060607: IR observations
  46. GRB 060502B: A Bright Early-type Galaxy as Putative Host of the Short Burst
  47. VLT/UVES observations of GRB 060607
  48. GRB 060607: PROMPT Observations
  49. GRB 060607: REM NIR afterglow
  50. GRB 060522: PROMPT Optical Limits
  51. GRB 060605 BAT refined analysis
  52. GRB 060605: Xinglong TNT optical observations
  53. GRB060602B : REM infrared observations
  54. GRB060605: Swift/UVOT detections
  55. GRB 060605: Swift-XRT Team refined analysis
  56. SALT spectroscopy of GRB 060605
  57. GRB 060605: TNG optical observations
  58. GRB 060605: RTT150 optical observations
  59. GRB060605: Spectral Observations and Redshift
  60. GRB 060605: ROTSE-III Optical Counterpart
  61. GRB 060605: ROTSE-III Detection of Optical Counterpart
  62. GRB060604: Swift/UVOT detections
  63. GRB 060604: redshift
  64. GRB 060512: Keck Redshift
  65. GRB 060604 optical photometry
  66. GRB 060604: Swift-XRT Team refined analysis
  67. GRB 060604: BAT refined analysis
  68. GRB 060604A: ROTSE-III Optical Limits
  69. GRB 060602A: Swift-BAT Refined Analysis: Correction
  70. GRB 060602B: XMM-Newton Survey Source
  71. GRB 060602B: Swift-XRT Refined Analysis
  72. GRB 060602B: Swift-BAT Refined Analysis
  73. GRB 060602B: Swift/UVOT observations
  74. GRB 060602A: Swift-BAT Refined Analysis
  75. GRB 060211A : WIDGET simultaneous optical observations
  76. GRB060602A: optical observations(/transient?)
  77. GRB 060526: Tautenburg Second Epoch Observations
  78. GRB060602A: Bootes-IR observations
  79. GRB 060602B: Swift detection of a burst
  80. GRB060602B: Watcher observations - no OT candidate
  81. GRB060602B: BOOTES-IR candidate afterglow
  82. GRB 060502A: Optical afterglow observations
  83. GRB 060526: Break in X-ray light curve
  84. GRB 060526: RTT150 optical observations
  85. GRB060526, optical observations
  86. GRB 051227 : WIDGET simultaneous optical observations
  87. GRB 051028 : WIDGET pre-trigger limit
  88. GRB 060526: RTT150 optical observations
  89. GRB 060526: Multiple Optical Flares
  90. GRB060526: afterglow fitting and probable jet break
  91. GRB 060526: RTT150 optical observations
  92. GRB060526: Optical counterpart from MIRO
  93. GRB060502b: optical observations
  94. GRB 060526: RTT150 optical observations
  95. GRB 060526: Tautenburg OT observation and light curve fitting
  96. GRB060526: optical observations
  97. GRB 060526: SMARTS optical/IR afterglow observations
  98. GRB060526: possible break in the optical light curve
  99. GRB 060526: REM observations
  100. GRB 060526: RTT150 optical observations, afterglow flattening

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