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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"

19664 results found.

  1. GRB 090621B: GRT Optical Observation
  2. GRB 090621A: GRT Optical Observation
  3. PAIRITEL observations of GRB 090618
  4. GRB 090621B: Fermi GBM detection
  5. GRB 090621B: I-band observations from 1.23m CAHA
  6. GRB 090621: Fermi GBM observation
  7. GRB 090621B: Swift/UVOT Upper Limits
  8. GRB 090621B: Swift-BAT refined analysis
  9. GRB 090621B: Swift-XRT refined analysis
  10. GRB 090621B: RTT150 optical observations
  11. GRB 090618: RTT150 optical observations
  12. GRB 090621A: Swift-BAT refined analysis
  13. GRB 090621B: Swift detection of a short hard burst
  14. GRB 090621: Swift/UVOT Upper Limits
  15. GRB 090621: Swift-XRT Team refined analysis
  16. GRB 090621: Swift detection of a burst
  17. GRB 090618: ZTSh optical observations
  18. GRB090618, underlying supernova search
  19. GRB 090618: Fermi GBM observation
  20. GRB 090618, Swift-BAT refined spectral analysis
  21. GRB090618 - Continued optical monitoring and light curve break
  22. GRB 090618: Swift-BAT refined analysis
  23. GRB090618: Swift-XRT team refined analysis
  24. GRB090618: Swift/UVOT bright afterglow detection
  25. Swift XRT observations of GRB 090531A
  26. GRB 090618: AGILE observations
  27. GRB 090618: Enhanced Swift-XRT position
  28. GRB 090618 Faulkes Telescope North observations
  29. GRB 090618: ROTSE-III Detection of Optical Counterpart
  30. GRB090618: P60 Optical Afterglow
  31. GRB 090618: Swift detection of a bright burst with optical afterglow
  32. SGR 0418+5729 Fermi/GBM Detection of Pulsations
  33. RXTE Discovery of Pulsations from SGR 0418+5729
  34. GRB 090531B: Fermi GBM detection
  35. Discovery of a new soft gamma repeater source, SGR 0418+5729
  36. GRB 090607: XRT Team Refined Analysis
  37. GRB 090607: Swift/UVOT Upper Limits
  38. GRB 090607: Swift-BAT refined analysis of the SHB
  39. GRB 090607: Faulkes Telescope North observations
  40. GRB 090607: Swift detection of a burst
  41. Ignore GCN/Swift-BAT Lightcurve Notices for trigger 353567
  42. GRB 090530: RTT150 Optical Observation
  43. GRB 090529A: RTT150 Optical Observations
  44. GRB 090531B: GROND observation
  45. GRB 090530: Early RAPTOR Optical Observations
  46. GRB 090531B: Swift/BAT spectral lag results
  47. Corrections to GRB 090531B Swift/UVOT Upper Limits
  48. GRB 090531B, RIMOTS optical upper limits
  49. GRB 090531B: Swift/UVOT Upper Limits
  50. GRB 090530: GRT Optical Observation
  51. GRB 090531B: Swift-BAT refined analysis
  52. Initial Swift/UVOT observations of GRB 090531B
  53. GRB 090531B: Swift-XRT candidate afterglow position
  54. GRB 090531B: ROTSE-III Optical Limits
  55. GRB 090531B: Swift detection of a burst
  56. GRB 090531: Swift-BAT refined analysis
  57. GRB 090530: break in light curve
  58. GRB 090531: GROND upper limits
  59. GRB 090531: Swift detection of a burst
  60. GRB090530: Swift XRT refined analysis
  61. GRB090530: Swift/UVOT afterglow detection
  62. GRB 090529: Swift-XRT refined analysis
  63. GRB 090530: Enhanced Swift-XRT position
  64. GRB 090530: Swift-BAT refined analysis
  65. GRB 090530: PAIRITEL NIR Detections
  66. GRB 090530A: ROTSE-III Detection of Optical Counterpart
  67. GRB 090530: Swift detection of a burst with an optical counterpart
  68. GRB 090529: optical observations
  69. GRB 090529: TLS Afterglow Observations
  70. GRB090529: UVOT/Swift detection of a brightening optical afterglow
  71. GRB 090529: Swift-BAT refined analysis
  72. GRB 090529: Enhanced Swift-XRT position
  73. GRB 090529: Preliminary Swift/UVOT Upper Limit
  74. GRB 090529: Swift detection of a burst
  75. GRB 090520B: Fermi GBM detection
  76. GRB 090516A: Konus-Wind and Swift/BAT joint spectral analysis
  77. GRB 090518: Fermi GBM detection
  78. GRB 090520 Swift-BAT detection of a burst in ground analysis
  79. GRB 090423: Fermi GBM T90 follow-up analysis results
  80. GRB 090516: Fermi GBM observation
  81. GRB 090519: Swift-XRT refined analysis
  82. GRB 090519: GROND observation
  83. GRB 090519: Swift/UVOT Upper Limits
  84. GRB 090519, Swift-BAT refined analysis
  85. GRB 090519: Enhanced Swift-XRT position
  86. GRB 090519: FARO Chante Perdrix Observatory optical observations
  87. GRB 090519: TAROT Calern observatory optical observations
  88. GRB 090519: Swift detection of a burst
  89. GRB 090518: Swift/UVOT Upper Limits
  90. GRB 090518, Swift-BAT refined analysis
  91. GRB 090516, RIMOTS optical upper limits
  92. GRB090518 : Optical upper limit by MOA-II telescope
  93. GRB 090518: Swift-XRT refined analysis
  94. GRB 090518: Enhanced Swift-XRT position
  95. GRB 090518: Swift detection of a burst
  96. GRB 090515: Swift/BAT spectral lag results
  97. GRB 090516: Swift-BAT refined analysis
  98. GRB 090516: GROND OBSERVATIONS
  99. GRB 090516 - Zadko Telescope observations
  100. GRB 090516: Swift XRT refined analysis

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