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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"

28179 results found.

  1. GRB060204B, optical observation
  2. GRB060204B - SDSS pre-burst observations
  3. GRB 060203: Swift-BAT refined analysis
  4. GRB 060204B: Swift detection of a burst
  5. GRB 060202: UKIRT/WFCAM K-band and KeckI/LRIS I-band Observation
  6. GRB 060203: RTT150 optical observations
  7. GRB 060203: IR Counterpart
  8. Possible GRB 060203: optical observations at Asiago
  9. GRB 060202: PROMPT Observations
  10. GRB 060202: GETS observation
  11. GRB 060202: Gemini-N J, H, K_s observations
  12. GRB 060202: Near-IR Observation with UKIRT/WFCAM
  13. GRB 060202: Optical Afterglow Candidate from Keck/LRIS
  14. GRB 060202: Refined analysis of the Swift-BAT burst
  15. GRB060202, optical observation
  16. GRB 060202: Swift/UVOT upper limits
  17. GRB 060121: Gemini Late-time Observations
  18. GRB 060130: PROMPT Observations
  19. GRB060130: Further R-band imaging
  20. GRB 060130: Swift/XRT observation
  21. GRB 060123: Gemini spectroscopy of the putative host galaxy
  22. GRB060130: Optical imaging
  23. GRB060130: REM infrared observations
  24. GRB 060130, SMARTS optical observations
  25. GRB 060130: FRAM optical observations
  26. GRB 060130: further INTEGRAL IBIS results
  27. GRB 060121: Confirmation of NIR Afterglow
  28. GRB 060123: Swift refined analysis of an unusual GRB
  29. GRB060124, BVRcIc field calibration
  30. GRB 060121: Probable Detection of NIR Afterglow
  31. GRB 060116 HST observations
  32. GRB 060124: HETE detection and spectrum of the main peak
  33. GRB060124: detailed XRT analysis
  34. GRB 060124: ART optical limits during the burst
  35. GRB060123: Optical and IR Imaging
  36. GRB 060123: P200 Observations
  37. GRB 060124: XRT refined analysis
  38. GRB 060124: R band Observations
  39. GRB 060124 : Optical observation at Xinglong and Kiso
  40. GRB060124: optical observations at Asiago
  41. GRB060123: SDSS pre-burst observations
  42. GRB 060116: Further analysis of VLT photometry and optical spectroscopy
  43. GRB 060121: OHP optical limits
  44. GRB 060124: TAROT optical limits
  45. GRB060124, optical observation
  46. GRB 060124: Optical Observations at Tautenburg
  47. GRB 060117: Suzaku WAM observation of the prompt emission
  48. GRB 060111B: Suzaku WAM observation of the prompt emission
  49. GRB 060124: Swift-BAT detection of a burst
  50. GRB 060121: Liverpool Telescopes optical limits
  51. GRB 060121: Swift XRT refined analysis
  52. Konus-Wind observation of GRB 060121
  53. GRB 060121: candidate optical counterpart
  54. GRB 060121: Infrared Observations
  55. GRB 060121: optical observations
  56. GRB 060121: Optical imaging
  57. GRB060121 - SDSS pre-burst observations
  58. HETE Alert 4006: MASTER promt optical limit
  59. GRB060117 - ATCA 3/6cm radio limits - correction
  60. GRB060117 - ATCA 3/6cm radio limits
  61. GRB 060116: photometric redshift - the farthest GRB?
  62. Konus-Wind observation of GRB 060117
  63. GRB 060116: UKIRT IR Observations
  64. GRB 060117: Refined analysis of the Swift-BAT burst
  65. GRB 060117: FRAM optical afterglow candidate
  66. GRB 060117: nearby galaxy
  67. GRB 060116: VLT optical observations
  68. GRB 060116: Refined analysis of the Swift-BAT burst
  69. GRB 060116: XRT refined analysis
  70. GRB 060116: IR Candidate Afterglow
  71. GRB 060116: Swift/UVOT upper limits
  72. GRB060115: REM observations
  73. GRB 060110: XRT position and analysis
  74. GRB 060116 : Lulin optical limit
  75. GRB060116: Faulkes North observation
  76. GRB 060116: Swift-BAT detection of a burst
  77. GRB 060115: Refined analysis of the Swift-BAT burst
  78. GRB 060115: Swift/UVOT upper limits
  79. GRB 060114: REM observations
  80. GRB 060115: Swift XRT refined analysis
  81. GRB 060114: Swift/UVOT Observations
  82. GRB060115, optical observation
  83. GRB 060115: MITSuME optical afterglow candidate
  84. GRB 060115: Swift detection of a burst
  85. GRB060114, optical observation
  86. GRB060114: Faulkes North observation
  87. GRB 060108: IR observations of afterglow
  88. GRB 060108: Evidence for an XRT Position Offset
  89. GRB 060110: KAIT observations
  90. GRB 060111B: Swift XRT refined analysis
  91. GRB 060111B: MITSuME detection of optical afterglow
  92. GRB 060111B: TAROT optical observation
  93. GRB060111A: RTT150 optical observations
  94. GRB060111B: RTT150, possible host galaxy
  95. GRB 060111B: Refined analysis of the Swift-BAT burst
  96. GRB 060111(a): P60 Observations
  97. GRB 060111B: Gualba observatory limit
  98. GRB 060111B: Swift detection of a burst
  99. GRB 060111: Swift-BAT Refined Analysis
  100. GRB060111.2:_MASTER optical limit

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