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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"

19297 results found.

  1. GRB060807: Possible Highly Significant X-ray Emission Lines
  2. GRB 060729: An update on the Swift XRT and UVOT observations
  3. GRB060807: Optical limiting magnitudes
  4. GRB 060805B: XRT Team Analysis
  5. GRB060806 is similar to previous activity of SGR1806-20
  6. GRB 060807: XRT Team refined analysis
  7. GRB 060807: Refined analysis of the Swift-BAT burst
  8. GRB060807 - SDSS Pre-burst Observations
  9. GRB 060805B: X-ray Afterglow Detection, Spectral/Spatial/Temporal Properties
  10. GRB 060807: Swift detection of a burst
  11. GRB060805 Liverpool Telescope observations
  12. GRB 060805: XRT Team Refined Analysis
  13. GRB 060805: Swift-BAT Refined Analysis
  14. GRB 060805: Swift/UVOT Upper Limits
  15. GRB 060805 - SDSS Pre-Burst Observations
  16. GRB 060804: Swift-XRT Team Refined Analysis
  17. GRB 060804: Refined analysis of the Swift-BAT burst
  18. GRB 060804: Swift detection of a burst with a possible UVOT counterpart
  19. GRB 060728: Upper limits of the X-ray emission
  20. GRB 060801: no variability of optical sources
  21. GRB 060801: optical observations at Hanle and Calar Alto
  22. GRB060801: optical upper limit in R
  23. GRB 060801: Refined analysis of the Swift-BAT short hard burst
  24. GRB 060801, optical observation
  25. GRB 060719: TORTOREM optical upper limits
  26. GRB 060729: Swift/UVOT Detections
  27. GRB 060729: Refined analysis of the Swift-BAT burst
  28. GRB 060729: Swift-XRT refined analysis
  29. GRB 060729: Swift/UVOT Observations
  30. GRB 060729: Swift detection of a burst with an UVOT optical counterpart
  31. Swift/XRT preliminary analysis
  32. GRB 060719: correction to the coordinates reported in GCN 5347
  33. GRB 060719: VLT/ISAAC observations
  34. GRB 060719: Refined analysis of the Swift-BAT burst
  35. GRB 060719: XRT refined analysis
  36. GRB 060719: further analysis of VLT observations
  37. GRB 060719: Swift detection of a burst
  38. GRB 060717: Swift XRT refined analysis
  39. GRB 060714: Refined analysis of the Swift-BAT burst
  40. GRB 060717: Swift-BAT refined analysis
  41. GRB 060714: Swift XRT refined analysis
  42. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  43. GRB 060712: XRT refined analysis
  44. GRB060526: optical observations
  45. GRB 060712: Refined analysis of the Swift-BAT burst
  46. Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
  47. GRB 060708: Swift-XRT refined analysis
  48. GCN 060708: Swift-UVOT Observations
  49. GRB 060708: Refined analysis of the Swift-BAT burst
  50. GCN 060707: Swift-UVOT observations
  51. GRB 060707: Swift-XRT refined analysis
  52. GRB 060708: Swift detection of a burst with an UVOT countpart
  53. GRB 060707: Refined analysis of the Swift-BAT burst
  54. GRB 060707: BOOTES-IR optical observation
  55. GRB 060515: Upper Limit on Host Galaxy
  56. GRB 050223: Magellan redshift
  57. GRB 060614: SMARTS host galaxy observations
  58. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  59. GRB 060614: Redshift
  60. GRB050326: Host Galaxy Candidates
  61. Konus-Wind observation of GRB 060614
  62. GRB 060614: optical observations
  63. GRB 060614: Swift-BAT refined analysis
  64. GRB060614: Swift-XRT refined analysis
  65. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart
  66. BAT Trigger #214277 is SGR 1900+14
  67. GRB 060610: KAIT observations
  68. GRB 060607B: Swift-BAT Refined Analysis
  69. GCN 060607: Swift-UVOT obswervations.
  70. GRB 060607: Swift-BAT Refined Analysis
  71. GRB 060607: Swift-XRT Team refined analysis
  72. GRB 060502B: A Bright Early-type Galaxy as Putative Host of the Short Burst
  73. VLT/UVES observations of GRB 060607
  74. GRB 060607: Swift detection of a burst with bright optical counterpart
  75. GRB 060522: PROMPT Optical Limits
  76. GRB 060605 BAT refined analysis
  77. GRB060605: Swift/UVOT detections
  78. GRB 060605: Swift-XRT Team refined analysis
  79. GRB 060605: RTT150 optical observations
  80. GRB 060605: Swift detection of a burst with optical counterpart
  81. GRB 060604: Swift-XRT Team refined analysis
  82. GRB 060604: BAT refined analysis
  83. GRB 060604: Swift detection of a burst with possible optical counterpart
  84. GRB 060602A: Swift-BAT Refined Analysis: Correction
  85. GRB 060602B: XMM-Newton Survey Source
  86. GRB 060602B: Swift-XRT Refined Analysis
  87. GRB 060602B: Swift-BAT Refined Analysis
  88. GRB 060602A: Swift-BAT Refined Analysis
  89. GRB 060602B: RTT150 optical observations
  90. GRB 060211A : WIDGET simultaneous optical observations
  91. GRB 060602B: Swift detection of a burst
  92. GRB060602B: BOOTES-IR candidate afterglow
  93. GRB060602 - SDSS Pre-Burst Observations
  94. GRB 060526: Break in X-ray light curve
  95. GRB060526, optical observations
  96. GRB 051227 : WIDGET simultaneous optical observations
  97. GRB 051028 : WIDGET pre-trigger limit
  98. GRB060526: Optical counterpart from MIRO
  99. GRB 060526: MDM-2.4m Observations
  100. GRB 060526: Refined analysis of the Swift-BAT burst

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