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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"

28232 results found.

  1. GRB 070721A, Swift-BAT refined analysis
  2. GRB070721B: A bright UVOT candidate
  3. GRB 070714B: Swift/BAT and Suzaku/WAM joint spectral analysis
  4. GRB 070714B : Suzaku WAM observation of the prompt emission
  5. GRB070714B: TNG NIR observations
  6. Erratum : Suzaku WAM observation of GRB 070704
  7. GRB 070714A: Swift/UVOT Upper limits
  8. GRB 070714B: Swift/UVOT Upper Limits
  9. GRB 070714B: confirmation of optical afterglow
  10. GRB 070616: No Evidence for I Band Afterglow
  11. GRB 070714A: Swift XRT refined analysis
  12. GRB070714B: Swift-XRT refined analysis
  13. GRB 070707: Swift-XRT follow-up observations
  14. GRB 070714B, Swift-BAT refined analysis of the short hard burst
  15. GRB 070714A, Swift-BAT refined analysis
  16. GRB 070714 : Liverpool Telescope optical counterpart ?
  17. GRB 070714: Swift detection of a bright burst, possibly short
  18. SN 2007bg - off-axis GRB?
  19. GRB 070704: RTT150 optical observations
  20. GRB 070704: Suzaku/WAM observation of the prompt emission
  21. Konus-Wind observation of GRB 070707
  22. GRB 070707: optical afterglow
  23. Swift/UVOT Observations of GRB070707
  24. Swift XRT observation of GRB 070707
  25. GRB 070707: VLT observations
  26. GRB070704: FAVOR optical observations
  27. GRB 070704 : Liverpool Telescope Observations
  28. GRB 070611: VLT observations
  29. VLA detection of GRB 070612A in C Band
  30. GRB 070704: Swift-XRT refined analysis
  31. Swift/UVOT Observations of GRB070704
  32. GRB 070704, Swift-BAT refined analysis
  33. GRB 070704: Correction to GCN Circ 6594
  34. GRB 070704: Swift detection of a burst
  35. GRB 070626: Suzaku/WAM observation of the prompt emission
  36. GRB 070628 Swift-UVOT Refined Analysis
  37. GRB 070628: NIR detection of afterglow
  38. GRB 070628, Swift-BAT refined analysis
  39. GRB 070628: TAROT La Silla observatory optical observations
  40. Swift UVOT Observations of GRB 070628
  41. OT20050728 was not an optical GRB afterglow
  42. GRB 070616 : WIDGET simultaneous optical observations
  43. GRB 070616: Suzaku/WAM observation of the prompt emission
  44. GRB070621: RTT150 optical observations
  45. GRB 070621: VLT optical observations
  46. GRB 070621: Swift/UVOT Upper Limits
  47. Keck Laser Guide Star Adaptive Optics Imaging of GRB 070621
  48. GRB 070621: Swift-BAT refined analysis
  49. GRB070621: Swift XRT refined analysis
  50. GRB 070621: Gemini South optical imaging
  51. GRB 070621: UVOT-enhanced XRT position
  52. Observations of GRB070612A at Calar Alto
  53. GRB 070621: NOT observations
  54. GRB070621: OPTIMA-Burst optical upper limit
  55. GRB 070621: TAROT Calern observatory optical observations
  56. GRB 070621: Watcher Observations
  57. GRB 070621: Swift detection of a burst
  58. GMRT upper limit of GRB 070610/SWIFT J195509.6+261406 in 610 MHz
  59. Swift/UVOT detection of GRB070616 optical afterglow.
  60. GRB 070612A: NOT observations
  61. GRB070616: Optical Observation by MITSuME Okayama
  62. GRB 070616, Swift-BAT further refined analysis
  63. GRB 070616: BTA optical observations
  64. GRB 070616: TLS observation
  65. Swift XRT observations of the INTEGRAL burst GRB070615: Possible
  66. GRB 070616: Swift detection of a burst
  67. GRB 070612B: optical observations
  68. UVOT Observations of INTEGRAL burst GRB070615
  69. VLA upper limit on GRB 070610
  70. GRB 070615
  71. SWIFT J195509.6+261406 (GRB 070610): further observations
  72. GRB 070612A: Super-LOTIS observations
  73. GRB 070612A: Rapid Decay
  74. GRB 070612A: Suzaku/WAM observation of the prompt emission
  75. SWIFT J195509.6+261406 / GRB 070610: OPTIMA-Burst observations
  76. GRB070612A: MITSuME Okayama Observation
  77. GRB 070612A: continued SARA observations
  78. GRB 070611: Watcher Observations
  79. Swift Trigger 282176 is Cygnus X-1
  80. GRB 070612A: P60 Confirmation of Afterglow and An Underlying, Nearby
  81. GRB 070612B: SARA upper limit
  82. GRB 070612B, Swift-BAT refined analysis
  83. GRB 070612A, Swift-BAT refined analysis
  84. SWIFT J195509.6+261406 / GRB 070610: SWIFT continued observations
  85. GRB 070612B: Swift/UVOT upper limits
  86. GRB 070612B: FRAM limit
  87. GRB070612B: P60 Observations
  88. GRB 070612A: SARA detection of possible OT
  89. GRB 070610: TAROT Calern observatory optical observations
  90. GRB 070610: MITSuME OAO optical upper limit
  91. GRB070612 - SDSS Pre-Burst Observations
  92. GRB 070612: Swift detection of a burst
  93. GRB 070610: OPTIMA-Burst detection of continued strong flaring activity
  94. GRB 070610: SARA upper limit
  95. GRB 070610: Swift-XRT refined analysis
  96. GRB 070611: Swift/UVOT Observations
  97. GRB 070611: Swift-XRT refined analysis
  98. GRB 070611, Swift-BAT refined analysis
  99. GRB 070610: Optical observations from OSN
  100. GRB 070610: Watcher Observations

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