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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"

21959 results found.

  1. The Unusually Long-Lived Afterglow of GRB 060614
  2. GRB 060614: optical observations
  3. GRB 060605, optical observations
  4. GRB060614: SSO 1m observations
  5. GRB060614: Watcher observation
  6. GRB 060614: Swift/UVOT Observations
  7. GRB 060604, optical observations
  8. GRB 060610: KAIT observations
  9. GRB 060607: RTT150 optical observations
  10. GRB 060607: IR observations
  11. GRB 060502B: A Bright Early-type Galaxy as Putative Host of the Short Burst
  12. VLT/UVES observations of GRB 060607
  13. GRB 060607: PROMPT Observations
  14. GRB 060605: RTT150 optical observations
  15. GRB 060607: REM NIR afterglow
  16. GRB 060605: Xinglong TNT optical observations
  17. GRB060602B : REM infrared observations
  18. GRB060605: Swift/UVOT detections
  19. GRB 060605: TNG optical observations
  20. GRB 060605: RTT150 optical observations
  21. GRB060605: Spectral Observations and Redshift
  22. GRB 060605: ROTSE-III Optical Counterpart
  23. GRB 060605: ROTSE-III Detection of Optical Counterpart
  24. GRB 060604: redshift
  25. GRB 060512: Keck Redshift
  26. GRB 060602B: Swift-BAT Refined Analysis
  27. GRB 060602B: Swift/UVOT observations
  28. GRB 060602B: RTT150 optical observations
  29. GRB 060211A : WIDGET simultaneous optical observations
  30. GRB060602A: optical observations(/transient?)
  31. GRB 060526: Tautenburg Second Epoch Observations
  32. GRB060602A: Bootes-IR observations
  33. GRB060602B: Watcher observations - no OT candidate
  34. GRB060602B: BOOTES-IR candidate afterglow
  35. GRB060602 - SDSS Pre-Burst Observations
  36. GRB 060502A: Optical afterglow observations
  37. GRB 060526: RTT150 optical observations
  38. GRB060526, optical observations
  39. GRB 051227 : WIDGET simultaneous optical observations
  40. GRB 060526: RTT150 optical observations
  41. GRB 060526: RTT150 optical observations
  42. GRB060502b: optical observations
  43. GRB 060526: RTT150 optical observations
  44. GRB060526: optical observations
  45. GRB 060526: SMARTS optical/IR afterglow observations
  46. GRB 060526: REM observations
  47. GRB 060526: RTT150 optical observations, afterglow flattening
  48. GRB 060526: Optical Flare
  49. GRB 060526: MDM-2.4m Observations
  50. GRB 060526: RTT150 optical observations
  51. GRB060526: Further Swift-UVOT Observations
  52. GRB060526, optical observations
  53. GRB 060526: TNG optical observations
  54. GRB 060526: ROTSE-III Observations of Optical Counterpart
  55. GRB 060526: Watcher Observations
  56. GRB060526 - SDSS Pre-burst Observations
  57. GRB 060526: Continued emission for the Swift burst
  58. GRB060505: VLT observations of the optical afterglow
  59. GRB 060413 : WIDGET simultaneous optical observations
  60. GRB 060522: Swift/UVOT Observations: Correction
  61. GRB 060522: Swift/UVOT Observations of the Optical Afterglow
  62. GRB060512: Late-Time P200 Observations
  63. GRB 060522: REM NIR observations
  64. GRB 060522: TNG optical observations
  65. GRB060515: P200 NIR Observations
  66. GRB 060512: TAROT optical observation
  67. GRB 060515: Super-LOTIS Observations
  68. Swift/UVOT observations of GRB060512.
  69. GRB 060512: Subaru NIR observation
  70. GRB 060512: 1.54m Kuiper Observations
  71. GRB 060512: Detection of NIR afterglow
  72. GRB 060512: P60 Observations
  73. GRB 060505 - OT candidate + galaxy spectrum
  74. GRB 060512: optical decay
  75. GRB 060512: REM NIR observations
  76. GRB060512 - SDSS Pre-Burst Observations
  77. GRB060512 Name Correction: LT Afterglow detection
  78. GRB060512: Liverpool Telescope Afterglow detection
  79. GRB060418: optical observations
  80. GRB 060428a, SMARTS optical/IR afterglow detection
  81. GRB060510 - SDSS Pre-Burst Observations
  82. GRB 060510b: Redshift
  83. GRB 060510b: Gemini NIR observations
  84. GRB 060510B: Super-LOTIS Observations
  85. GRB 060510b: NIR observations
  86. GRB 060510B: MDM Observations and candidate OT
  87. GRB 060510B: Swift detection of a burst
  88. GRB060502B: improvement in the XRT afterglow position
  89. GRB 060505: PROMPT Observations
  90. GRB 060507: MDM Optical Upper Limit
  91. GRB060507: Swift XRT position
  92. GRB060505: Swift/UVOT Observations
  93. GRB 060505: Swift XRT Team Refined Analysis
  94. GRB060425: new MASTER survey method
  95. GRB 060306: Further Analysis of SOAR and APO NIR Observations
  96. GRB 060505: Swift XRT afterglow canditate position
  97. GRB 060502b: Second epoch Gemini observations
  98. GRB 060428B: spectroscopy
  99. GRB 060502B: optical observations
  100. GRB 060502B: AROMA refined photometric calibration

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