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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"

20402 results found.

  1. Four radio sources in Swift-XRT error box of GRB 070724
  2. GRB 070724: P60 and Gemini Observations
  3. GRB 060814 - Keck host detection and redshift
  4. Swift/UVOT refined analysis of GRB070724
  5. GRB 070724: Swift-XRT Team refined analysis
  6. GRB 070721B: further observations and analysis
  7. GRB 070724: Swift detection of a burst
  8. GRB 070714B: Keck observations
  9. Swift/UVOT Observations of GRB070721A
  10. GRB 070721B : Faulkes Telescope South observations
  11. GRB 070721A : Faulkes Telescope South optical limit
  12. GRB 070721A: Swift/XRT refined analysis
  13. GRB 070721A, Swift-BAT refined analysis
  14. GRB070721B: A bright UVOT candidate
  15. GRB070714B: TNG NIR observations
  16. GRB 070714A: Swift/UVOT Upper limits
  17. GRB 070714B: Swift/UVOT Upper Limits
  18. GRB 070714B: Swift-BAT spectral lag for the SHB
  19. GRB 070714B: confirmation of optical afterglow
  20. GRB 070616: No Evidence for I Band Afterglow
  21. GRB 070714A: Swift XRT refined analysis
  22. GRB070714B: Swift-XRT refined analysis
  23. GRB 070714 : Liverpool Telescope optical counterpart ?
  24. GRB 070714: Swift detection of a bright burst, possibly short
  25. GRB 070704: RTT150 optical observations
  26. GRB 070707: optical afterglow
  27. Swift/UVOT Observations of GRB070707
  28. Swift XRT observation of GRB 070707
  29. GRB 070707: VLT observations
  30. GRB 070707: A long GRB detected by INTEGRAL
  31. GRB 070707: A long GRB detected by INTEGRAL
  32. GRB 070429B: NIR Observations
  33. GRB070704: FAVOR optical observations
  34. GRB 070704 : Liverpool Telescope Observations
  35. GRB 070611: VLT observations
  36. VLA detection of GRB 070612A in C Band
  37. Konus-Wind observation of GRB 070626
  38. GRB 070704: Swift-XRT refined analysis
  39. Swift/UVOT Observations of GRB070704
  40. GRB 070704: Correction to GCN Circ 6594
  41. GRB 070704: Swift detection of a burst
  42. GRB 070626: Suzaku/WAM observation of the prompt emission
  43. GRB 070626: IPN localization and Konus spectrum of a bright long burst
  44. GRB 070628 Swift-UVOT Refined Analysis
  45. GRB 070628: NIR detection of afterglow
  46. GRB 070628: TAROT La Silla observatory optical observations
  47. INTEGRAL burst GRB070615: X-ray continued observations
  48. GRB 070616 : WIDGET simultaneous optical observations
  49. GRB070621: RTT150 optical observations
  50. GRB 070621: VLT optical observations
  51. GRB 070621: Swift/UVOT Upper Limits
  52. Keck Laser Guide Star Adaptive Optics Imaging of GRB 070621
  53. WHT observations of GRB070621
  54. GRB 070621: Gemini South optical imaging
  55. GRB 070621: UVOT-enhanced XRT position
  56. Observations of GRB070612A at Calar Alto
  57. GRB 070621: NOT observations
  58. GRB070621: OPTIMA-Burst optical upper limit
  59. GRB 070621: TAROT Calern observatory optical observations
  60. GRB 070621: Watcher Observations
  61. GRB 070621: Swift detection of a burst
  62. GMRT upper limit of GRB 070610/SWIFT J195509.6+261406 in 610 MHz
  63. Swift/UVOT detection of GRB070616 optical afterglow.
  64. GRB070616: Optical Observation by MITSuME Okayama
  65. GRB 070616: TLS observation
  66. Swift XRT observations of the INTEGRAL burst GRB070615: Possible
  67. GRB 070616: Swift detection of a burst
  68. GRB 070612B: optical observations
  69. UVOT Observations of INTEGRAL burst GRB070615
  70. VLA upper limit on GRB 070610
  71. GRB 070615
  72. SWIFT J195509.6+261406 (GRB 070610): further observations
  73. GRB 070612A: Super-LOTIS observations
  74. GRB 070612A: Rapid Decay
  75. GRB 070612A: Suzaku/WAM observation of the prompt emission
  76. SWIFT J195509.6+261406 / GRB 070610: OPTIMA-Burst observations
  77. GRB070612A: MITSuME Okayama Observation
  78. GRB 070612A: continued SARA observations
  79. GRB 070611: Watcher Observations
  80. GRB 070612A: P60 Confirmation of Afterglow and An Underlying, Nearby
  81. GRB 070612B: SARA upper limit
  82. GRB 070612B: Swift-XRT refined analysis
  83. SWIFT J195509.6+261406 / GRB 070610: SWIFT continued observations
  84. GRB 070612B: Swift/UVOT upper limits
  85. GRB 070612B: FRAM limit
  86. GRB070612B: P60 Observations
  87. GRB 070612A: SARA detection of possible OT
  88. GRB 070610: TAROT Calern observatory optical observations
  89. GRB 070610: MITSuME OAO optical upper limit
  90. GRB070612 - SDSS Pre-Burst Observations
  91. GRB 070610: OPTIMA-Burst detection of continued strong flaring activity
  92. GRB 070610: SARA upper limit
  93. GRB 070610: Swift-XRT refined analysis
  94. GRB 070611: Swift/UVOT Observations
  95. GRB 070610: Optical observations from OSN
  96. GRB 070610: Watcher Observations
  97. GRB 070611: ROTSE-III Optical Limits
  98. GRB 070610: Swift-UVOT Upper Limits
  99. GRB 070610: OPTIMA-Burst high-time-resolution optical observations
  100. GRB 070412: TAROT Calern observatory optical observations

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