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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"

23608 results found.

  1. GRB 070714 : Liverpool Telescope optical counterpart ?
  2. GRB 070714: Swift detection of a bright burst, possibly short
  3. Swift detection of a possible burst (Trigger 284850)
  4. GRB 070704: RTT150 optical observations
  5. GRB 070704: Suzaku/WAM observation of the prompt emission
  6. Konus-Wind observation of GRB 070707
  7. GRB 070707: A long GRB detected by INTEGRAL
  8. GRB 070707: A long GRB detected by INTEGRAL
  9. GRB 070429B: NIR Observations
  10. GRB070704: FAVOR optical observations
  11. GRB 070704 : Liverpool Telescope Observations
  12. GRB 070704, Swift-BAT refined analysis
  13. GRB 070704: Swift detection of a burst
  14. GRB 070626: Suzaku/WAM observation of the prompt emission
  15. GRB 070626: IPN localization and Konus spectrum of a bright long burst
  16. GRB 070628, Swift-BAT refined analysis
  17. GRB 070628: TAROT La Silla observatory optical observations
  18. GRB 070628: Swift XRT refined analysis
  19. GRB 070628: Swift detection of a possible burst
  20. GRB 070612A: Allen Telescope Array Observations
  21. OT20050728 was not an optical GRB afterglow
  22. GRB 070616 : WIDGET simultaneous optical observations
  23. GRB 070616: Suzaku/WAM observation of the prompt emission
  24. GRB070621: RTT150 optical observations
  25. GRB 070621: Swift-BAT refined analysis
  26. Observations of GRB070612A at Calar Alto
  27. GRB 070621: TAROT Calern observatory optical observations
  28. GRB 070621: Swift detection of a burst
  29. GRB 070612A: TNG optical observations
  30. Swift/UVOT detection of GRB070616 optical afterglow.
  31. GRB 070612A: NOT observations
  32. GRB070616: Optical Observation by MITSuME Okayama
  33. GRB 070616: BTA optical observations
  34. Swift/UVOT observations of GRB070616
  35. GRB 070616, Swift-BAT partial refined analysis
  36. GRB 070616: Swift detection of a burst
  37. GRB 070615: A long GRB detected by INTEGRAL
  38. GRB 070612A: Super-LOTIS observations
  39. GRB 070612A: Suzaku/WAM observation of the prompt emission
  40. GRB070612A: MITSuME Okayama Observation
  41. Swift Trigger 282176 is Cygnus X-1
  42. GRB 070612A: MDM Observations
  43. GRB 070612B, Swift-BAT refined analysis
  44. GRB 070612A, Swift-BAT refined analysis
  45. GRB 070612B: KAIT limits
  46. GRB 070610: TAROT Calern observatory optical observations
  47. GRB 070610: MITSuME OAO optical upper limit
  48. GRB 070612B: Swift detection of a burst
  49. GRB070612 - SDSS Pre-Burst Observations
  50. GRB 070612: Swift detection of a burst
  51. GRB 070610: TLS RRM sees flaring behaviour - Galactic transient?
  52. GRB 070611, Swift-BAT refined analysis
  53. GRB 070611: VLT redshift
  54. GRB 070611: ROTSE-III Optical Limits
  55. GRB 070611: Swift detection of a burst
  56. GRB 070610, Swift-BAT refined analysis
  57. GRB 070610: Swift detection of a burst
  58. GRB 070412: TAROT Calern observatory optical observations
  59. GRB 070411: TAROT Calern observatory optical observations
  60. GRB 070419A, deep LBT photometry and possible supernova detection
  61. GRB070520: optical observation
  62. GRB070518: optical observation
  63. GRB070521: optical observation
  64. Swift/UVOT refined analysis of GRB070531
  65. GRB 070531: Swift-BAT refined analysis
  66. GRB 070531: Liverpool Telescope Optical Observations
  67. GRB 070531: Swift detection of a burst
  68. Swift/UVOT refined analysis of GRB070529
  69. GRB 070529: MARGE Observations
  70. GRB 070529: Optical aterglow from MIRO
  71. GRB 070529: Gemini Redshift
  72. GRB 070529, Swift-BAT refined analysis
  73. GRB 070529: Swift detection of a burst with an optical aterglow
  74. Swift Triggers 280447, 280450 and 280451 are invalid
  75. Swift trigger 280447 is probably a Galactic transient
  76. GRB 070518, deep LBT photometry
  77. GRB 070518: MARGE Observations
  78. Konus-Wind observation of GRB 070521
  79. GRB 070521: Keck imaging
  80. GRB 070521 Milagro GeV/TeV Observations
  81. GRB 070521, Swift-BAT refined analysis
  82. GRB 070521: optical limit by Pi of the Sky
  83. GRB070521: P200 Observations
  84. GRB070521 : Faulkes Telescope North Observations
  85. GRB 070521: TAROT La Silla observatory optical observations
  86. GRB070521 - SDSS Pre-Burst Observations
  87. GRB 070521: Swift detection of a burst
  88. GRB 070520B, Swift-BAT refined analysis
  89. GRB 070520A, Swift-BAT refined analysis
  90. GRB 070518: TNG observations
  91. GRB 070520B: Swift detection of a burst
  92. GRB 070520: Swift detection of a burst
  93. GRB 070518, Swift-BAT refined analysis
  94. GRB 070518: Swift detection of a burst with optical afterglow
  95. GRB 070517, Swift-BAT refined analysis
  96. GRB 070517: Optical search
  97. GRB 070517: Swift detection of a burst
  98. GRB 070512: IPN localization and Konus spectrum of a bright burst
  99. GRB070419A: optical observations
  100. GRB 070419A, Deep LBT photometry

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