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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"

32770 results found.

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

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