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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"

28237 results found.

  1. GRB 070611: Swift/UVOT Observations
  2. GRB 070611: Swift-XRT refined analysis
  3. GRB 070611, Swift-BAT refined analysis
  4. GRB 070610: Optical observations from OSN
  5. GRB 070610: Watcher Observations
  6. GRB 070611: ROTSE-III Detection of Late Rising Optical Counterpart
  7. GRB 070611: ROTSE-III Optical Limits
  8. GRB 070610: Swift-UVOT Upper Limits
  9. GRB 070610: OPTIMA-Burst high-time-resolution optical observations
  10. GRB 070610, Swift-BAT refined analysis
  11. GRB 070412: TAROT Calern observatory optical observations
  12. GRB 070411: TAROT Calern observatory optical observations
  13. GRB070520B: optical observations
  14. GRB070520: optical observation
  15. GRB070518: optical observation
  16. GRB070521: optical observation
  17. GRB 070531: NOT nIR observations
  18. GRB 070531: Swift-BAT refined analysis
  19. GRB 070531: I-band observations from IAC80
  20. GRB 070531: Liverpool Telescope Optical Observations
  21. GRB 070529: SARA upper limit
  22. Swift/UVOT refined analysis of GRB070529
  23. GRB 070529: Optical aterglow from MIRO
  24. GRB 070529: Swift-XRT refined analysis
  25. GRB 070529, Swift-BAT refined analysis
  26. GRB 070529: Xinglong TNT Optical Upper Limit
  27. GRB 070529: Swift detection of a burst with an optical aterglow
  28. GRB 070412: Deep Keck imaging
  29. Swift trigger 280447 is probably a Galactic transient
  30. GRB 070518, deep LBT photometry
  31. Konus-Wind observation of GRB 070521
  32. GRB070521: Second Epoch Gemini Imaging
  33. GRB 070521: Swift/UVOT Upper Limits
  34. GRB 070521, optical observation
  35. GRB 070521: Swift-XRT refined analysis
  36. GRB 070521: Keck imaging
  37. GRB070521: Gemini Observations
  38. GROND upper limits of GRB 070521
  39. GRB 070520B: SARA upper limit
  40. GRB 070520A: SARA upper limit
  41. GRB 070521: SARA upper limit
  42. GRB 070521: Subaru observations and possible host detection
  43. GRB 070520B: Swift/UVOT Upper Limits
  44. GRB 070520A: Subaru Observations
  45. GRB 070521, Swift-BAT refined analysis
  46. GRB 070520A: Swift UVOT Upper Limits
  47. GRB 070520B: Swift-XRT refined analysis
  48. GRB 070521: TAROT La Silla observatory optical observations
  49. GRB070521 - SDSS Pre-Burst Observations
  50. GRB 070521: Swift detection of a burst
  51. GRB 070520A: MITSuME Akeno optical upper limits
  52. GRB 070520B, Swift-BAT refined analysis
  53. GRB 070520A, Swift-BAT refined analysis
  54. GRB 070520A: Swift-XRT refined analysis
  55. GRB 070518: TNG observations
  56. GRB 070520B: Swift detection of a burst
  57. GRB 070520: Xinglong EST optical Upper Limit
  58. GRB 070520: Swift detection of a burst
  59. VLA observation of GRB 070518
  60. GRB 070518: Swift-XRT refined analysis
  61. GRB070518: UVOT refined analysis
  62. GRB 070518, Swift-BAT refined analysis
  63. GRB 070518: OT confirmed form Xinglong TNT observation
  64. GRB 070518: Swift detection of a burst with optical afterglow
  65. GRB070517: Swift-XRT Refined Analysis
  66. GRB 070517, Swift-BAT refined analysis
  67. GRB 070517: Optical search
  68. GRB 070517: Swift detection of a burst
  69. GRB 070509: objects inside XRT error circle
  70. GRB 070512: IPN localization and Konus spectrum of a bright burst
  71. GRB070419A: optical observations
  72. GRB 070509: Swift/UVOT Upper Limits
  73. Konus-Wind and Konus-A observation of GRB 070508
  74. GRB 070510: Swift detection of a possible burst
  75. GRB070509: Swift-XRT Refined Analysis
  76. GRB 070509, Swift-BAT refined analysis
  77. GRB 070508: Suzaku/WAM observation of the prompt emission
  78. GRB 070509: REM observations
  79. GRB070508: Swift/UVOT Observations
  80. GRB 070508, Swift-BAT refined analysis
  81. GRB 070508: REM observations
  82. GRB 070508: TAROT La Silla observatory optical observations
  83. GRB 070508: Swift detection of an intense burst with an optical counterpart
  84. GRB070506: Swift/UVOT Observations
  85. GRB070506: Swift XRT refined analysis
  86. GRB 070506, Swift-BAT Refined Analysis
  87. GRB 070506: Swift detection of a burst with optical afterglow
  88. GRB070429B: VLT observations
  89. GRB070429B: position correction
  90. GRB 070309: Swift-XRT afterglow confirmation
  91. VLA observation of GRB 070429B
  92. Swift/UVOT observations of GRB070429B
  93. GRB 070429B, Swift-BAT refined analysis
  94. Swift/UVOT observations of GRB070429A
  95. GRB 070429A, Swift-BAT refined analysis
  96. GRB 070429A: optical and NIR observations
  97. GRB 070429B: Swift XRT refined analysis
  98. GRB 070429B: ROTSE-III Optical Limits
  99. GRB 070429: ROTSE-III Optical Limits
  100. GRB 070429: Swift detection of a burst

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