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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"

28117 results found.

  1. GRB 070714 : Liverpool Telescope optical counterpart ?
  2. GRB 070714: Swift detection of a bright burst, possibly short
  3. SN 2007bg - off-axis GRB?
  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: optical afterglow
  8. Swift/UVOT Observations of GRB070707
  9. Swift XRT observation of GRB 070707
  10. GRB 070707: VLT observations
  11. GRB070704: FAVOR optical observations
  12. GRB 070704 : Liverpool Telescope Observations
  13. GRB 070611: VLT observations
  14. VLA detection of GRB 070612A in C Band
  15. GRB 070704: Swift-XRT refined analysis
  16. Swift/UVOT Observations of GRB070704
  17. GRB 070704, Swift-BAT refined analysis
  18. GRB 070704: Correction to GCN Circ 6594
  19. GRB 070704: Swift detection of a burst
  20. GRB 070626: Suzaku/WAM observation of the prompt emission
  21. GRB 070628 Swift-UVOT Refined Analysis
  22. GRB 070628: NIR detection of afterglow
  23. GRB 070628, Swift-BAT refined analysis
  24. GRB 070628: TAROT La Silla observatory optical observations
  25. Swift UVOT Observations of GRB 070628
  26. OT20050728 was not an optical GRB afterglow
  27. GRB 070616 : WIDGET simultaneous optical observations
  28. GRB 070616: Suzaku/WAM observation of the prompt emission
  29. GRB070621: RTT150 optical observations
  30. GRB 070621: VLT optical observations
  31. GRB 070621: Swift/UVOT Upper Limits
  32. Keck Laser Guide Star Adaptive Optics Imaging of GRB 070621
  33. GRB 070621: Swift-BAT refined analysis
  34. GRB070621: Swift XRT refined analysis
  35. GRB 070621: Gemini South optical imaging
  36. GRB 070621: UVOT-enhanced XRT position
  37. Observations of GRB070612A at Calar Alto
  38. GRB 070621: NOT observations
  39. GRB070621: OPTIMA-Burst optical upper limit
  40. GRB 070621: TAROT Calern observatory optical observations
  41. GRB 070621: Watcher Observations
  42. GRB 070621: Swift detection of a burst
  43. GMRT upper limit of GRB 070610/SWIFT J195509.6+261406 in 610 MHz
  44. Swift/UVOT detection of GRB070616 optical afterglow.
  45. GRB 070612A: NOT observations
  46. GRB070616: Optical Observation by MITSuME Okayama
  47. GRB 070616, Swift-BAT further refined analysis
  48. GRB 070616: BTA optical observations
  49. GRB 070616: TLS observation
  50. Swift XRT observations of the INTEGRAL burst GRB070615: Possible
  51. GRB 070616: Swift detection of a burst
  52. GRB 070612B: optical observations
  53. UVOT Observations of INTEGRAL burst GRB070615
  54. VLA upper limit on GRB 070610
  55. GRB 070615
  56. SWIFT J195509.6+261406 (GRB 070610): further observations
  57. GRB 070612A: Super-LOTIS observations
  58. GRB 070612A: Rapid Decay
  59. GRB 070612A: Suzaku/WAM observation of the prompt emission
  60. SWIFT J195509.6+261406 / GRB 070610: OPTIMA-Burst observations
  61. GRB070612A: MITSuME Okayama Observation
  62. GRB 070612A: continued SARA observations
  63. GRB 070611: Watcher Observations
  64. Swift Trigger 282176 is Cygnus X-1
  65. GRB 070612A: P60 Confirmation of Afterglow and An Underlying, Nearby
  66. GRB 070612B: SARA upper limit
  67. GRB 070612B, Swift-BAT refined analysis
  68. GRB 070612A, Swift-BAT refined analysis
  69. SWIFT J195509.6+261406 / GRB 070610: SWIFT continued observations
  70. GRB 070612B: Swift/UVOT upper limits
  71. GRB 070612B: FRAM limit
  72. GRB070612B: P60 Observations
  73. GRB 070612A: SARA detection of possible OT
  74. GRB 070610: TAROT Calern observatory optical observations
  75. GRB 070610: MITSuME OAO optical upper limit
  76. GRB070612 - SDSS Pre-Burst Observations
  77. GRB 070612: Swift detection of a burst
  78. GRB 070610: OPTIMA-Burst detection of continued strong flaring activity
  79. GRB 070610: SARA upper limit
  80. GRB 070610: Swift-XRT refined analysis
  81. GRB 070611: Swift/UVOT Observations
  82. GRB 070611: Swift-XRT refined analysis
  83. GRB 070611, Swift-BAT refined analysis
  84. GRB 070610: Optical observations from OSN
  85. GRB 070610: Watcher Observations
  86. GRB 070611: ROTSE-III Detection of Late Rising Optical Counterpart
  87. GRB 070611: ROTSE-III Optical Limits
  88. GRB 070610: Swift-UVOT Upper Limits
  89. GRB 070610: OPTIMA-Burst high-time-resolution optical observations
  90. GRB 070610, Swift-BAT refined analysis
  91. GRB 070412: TAROT Calern observatory optical observations
  92. GRB 070411: TAROT Calern observatory optical observations
  93. GRB070520B: optical observations
  94. GRB070520: optical observation
  95. GRB070518: optical observation
  96. GRB070521: optical observation
  97. GRB 070531: NOT nIR observations
  98. GRB 070531: Swift-BAT refined analysis
  99. GRB 070531: I-band observations from IAC80
  100. GRB 070531: Liverpool Telescope Optical Observations

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