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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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

19694 results found.

  1. GRB 111117A: Gemini Afterglow Limits
  2. GRB 111117A: optical upper limit in CrAO
  3. GRB 111117A: TNG observations
  4. GRB 111117A: Swift/UVOT Upper Limits
  5. GRB 111117A: GROND observations
  6. GRB 111117A: Gemini host observation
  7. GRB 111117A: Swift-XRT refined Analysis
  8. GRB 111117A: NOT observations
  9. GRB 111117A: Chandra ToO observation scheduled
  10. GRB 111117A: GMG upper limit
  11. GRB 111117A: Swift detection of a short hard burst
  12. GRB111107A: ATCA observations - upper limit and a possible detection
  13. IPN Triangulation of GRB 111113A (short/hard/intense)
  14. GRB 111109A: Swift/UVOT Photometry
  15. GRB 111109A: Enhanced Swift-XRT position
  16. GRB 111109A: Swift-XRT observations
  17. GRB 111103B: optical upper limit of CrAO
  18. GRB 111103B: optical upper limit of Mt. Terskol observatory
  19. Continued Skynet observations of GRB111107A
  20. GRB 111107A: APEX submm observation
  21. GRB 111107A: Swift/UVOT Afterglow Analysis
  22. GRB 111107A: Enhanced Swift-XRT position
  23. GRB 111107A: Gemini-South Redshift
  24. GRB 111107A: GROND observations
  25. Skynet observations of GRB 111107A
  26. GRB 111107A: Swift detection of a burst with an optical counterpart
  27. GRB 111103B : WIYN 3.5m NIR observations
  28. GRB111103B Swift/UVOT Upper Limits
  29. GRB 111103B: Enhanced Swift-XRT position
  30. GRB 111103B: Swift-BAT refined analysis
  31. Trigger 506913: Swift detection of Swift J1922.7-1716 and its optical counterpart
  32. GRB 111103B: Swift detection of a strong burst from a GRB or Galactic source
  33. GRB 111029A: RAPTOR Limits During the Gamma-ray Emitting Interval
  34. GRB 111029A: SAO RAS optical limits
  35. GRB 111029A: Super-LOTIS early limits
  36. GRB111029A: MITSuME Ishigakijima Optical Upper Limits
  37. GRB 111029A: PAIRITEL NIR Upper Limits
  38. GRB 111029A: Swift/UVOT Upper Limits
  39. GRB 111029A: Enhanced Swift-XRT position
  40. GRB 111029A: optical upper limit
  41. GRB 111029A: ROTSE-III Optical Limits
  42. GRB 111029A: Swift detection of a burst
  43. GRB 111022B: 10.4m GTC z'-band observations
  44. GRB111022B: D50 optical limit
  45. GRB 111020A: Chandra Observation
  46. GRB 111022B: BTA Optical Observations
  47. GRB 111022B: Swift/UVOT upper limits
  48. GRB 111022A: Swift/UVOT Upper Limits
  49. GRB 111016A: optical upper limit
  50. GRB 111022B: Swift-XRT refined Analysis
  51. GRB 111022B: NOT observations
  52. GRB 111022B: Enhanced Swift-XRT position
  53. GRB 111022A: Swift-BAT refined analysis
  54. GRB 111022A: Preliminary UVOT TDRSS Non-Detection
  55. GRB 111022B: Swift detection of a burst
  56. GRB 111022A: Swift detection of a burst
  57. GRB 111020A: Gemini-South additional observations and limit on an optical afterglow
  58. GRB 111020A: Gemini-South i-band observations
  59. GRB 111020A: Swift/UVOT Upper Limits
  60. GRB 111020A: Swift-BAT refined analysis
  61. GRB 111020A: Enhanced Swift-XRT position
  62. GRB 111020A: BOOTES-3 Optical Upper Limit.
  63. GRB 111020A: Swift detection of a short burst
  64. GRB 111018A: Swift/UVOT Upper Limits
  65. GRB 111018A: GROND Upper Limits
  66. GRB 111018A: Enhanced Swift-XRT position
  67. IPN Triangulation of GRB 111016B (long duration, intense)
  68. GRB111016A : WIYN 3.5m NIR observations
  69. GRB 111018A: Swift detection of a burst
  70. GRB111016A: D50 optical limit
  71. GRB 111016A: Gemini Detection of the NIR Counterpart
  72. GRB 111016A: Swift/UVOT Detection of a Source
  73. GRB 111016A: P60 Afterglow Candidate
  74. GRB 111016A: Enhanced Swift-XRT position
  75. GRB 111016A: Swift-XRT observations
  76. GRB 111016A: Swift detection of a burst
  77. GRB 110921A: optical observations
  78. GRB 111008A: Swift/UVOT Upper Limits
  79. GRB 111008A: IAC80 I-band observations
  80. GRB 111008A, GROND observations
  81. GRB 111008A: NOT optical observation
  82. GRB 111008A: Gemini optical counterpart
  83. GRB 111008A: Enhanced Swift-XRT position
  84. GRB 111008A: Swift detection of a burst
  85. GRB 111005A: ATCA 18 GHz detection
  86. GRB 111005A: ATCA radio upper limit
  87. GRB 111005A : miniTAO/ANIR NIR observations
  88. GRB 111005A: GROND NIR observations
  89. GRB 111005A: VLT IR observations
  90. GRB 110921A: MITSuME-Akeno Optical photometry
  91. Skynet/Dolomiti observations of GRB 110928A
  92. Skynet observations of GRB 110928A
  93. GRB 110928A: RAPTOR Limits During Gamma-ray Emitting Interval
  94. GRB 110928A: Swift/UVOT Upper Limits
  95. GRB 110825A: GROND Observations
  96. GRB 110928A: Enhanced Swift-XRT position
  97. GRB 110928A: P60 Observations
  98. GRB 110928A: Further PAIRITEL NIR Observations
  99. GRB 110928A: Swift-XRT observations
  100. GRB 110928A: Swift/UVOT finding chart observation

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