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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"

32768 results found.

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

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