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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"

32701 results found.

  1. GRB 080307: Early RAPTOR Limits
  2. GRB 080307, Swift-BAT refined analysis
  3. GRB 080307: TNT optical observation
  4. GRB080307: Optical upper limits
  5. GRB 080307: Gemini-N i-band observations - candidate afterglow
  6. GRB 080307: BOAO imaging - retraction and new limit
  7. GRB 080307: retraction of UVOT candidate
  8. GRB 080307, Preliminary Swift-BAT refined analysis
  9. VLA possible radio detection of GRB 080229
  10. GRB 080303: Swift/UVOT follow-up of afterglow detection
  11. GRB 080303, Swift-BAT refined analysis
  12. GRB 080303: Rapid PROMPT Detections
  13. GRB080303: Swift XRT refined analysis
  14. Swift UVOT observations of GRB080229B
  15. GRB080229B: Swift XRT afterglow observation
  16. GRB 080303A: Faulkes Telescope South optical afterglow observations
  17. GRB 080303A: ROTSE-III Optical Limits
  18. GRB 080229: I-band observations from OSN
  19. GRB 080229: VLT NIR observations
  20. GRB080229: Swift XRT refined analysis
  21. GRB 080229: TNG NIR observations
  22. GRB 080229: Deep Gemini/GMOS optical observations
  23. GRB 080229: REM NIR observations
  24. GRB080229: Possible optical afterglow
  25. UVOT analysis for GRB080229
  26. GRB 080229, Swift-BAT refined analysis
  27. GRB 080229: Faulkes Telescope South optical limit
  28. GRB 080229A: ROTSE-III Optical Limits
  29. Early optical shallow decay in GRB 071112C
  30. GRB080207: optical observations
  31. GRB080205: optical observations
  32. GRB080211: optical observations
  33. XRF 080109/SN2008D : GMRT upper limit at 1.28 GHz
  34. GRB 071010B : Early optical brightening detected by TAOS
  35. Swift-XRT improved positions, and new redshift limits.
  36. ESO optical and NIR observations of GRB 080218B
  37. GRB 080204: Suzaku WAM observation of the prompt emission
  38. GRB 080218B, Swift-BAT refined analysis
  39. GRB 080218B: Swift-XRT refined analysis
  40. Swift/UVOT observations of GRB080218B
  41. GRB 080218B: REM NIR early upper limits
  42. GRB 080212: Mount Abu NIR observations
  43. GRB 080218B: GROND upper limits
  44. GRB 080218b, SMARTS optical/IR limits
  45. GRB 080218A, Swift-BAT refined analysis
  46. GRB080218B: Watcher prompt limit
  47. GRB 080211: Suzaku WAM observation of the prompt emission
  48. Swift-XRT and UVOT observations of the IPN burst GRB 080211
  49. GRB 080212: VLT optical rapid decay
  50. GRB 080212: REM refined analysis
  51. Konus-Wind observation of GRB 080211
  52. VLA radio upper limit on GRB 080212
  53. Swift/UVOT refined analysis of GRB080212
  54. GRB 080212, Swift-BAT refined analysis
  55. GRB080212: Optical afterglow candidate observed by MITSuME Telescope
  56. GRB 080212: Gemini-South optical observations
  57. GRB 080212: GROND detects afterglow
  58. GRB 080212: REM NIR afterglow?
  59. GRB 080212: optical observations
  60. GRB 080212: Swift-XRT Team refined analysis
  61. GRB 080210: Keck photometry
  62. VLA non-detection of GRB 080210
  63. GRB 080207: VLT NIR early upper limits
  64. GRB 080210: Swift/UVOT Refined Analysis
  65. GRB 080207: optical observations.
  66. GRB 080210: Hobby-Eberly Telescope Absorption Spectroscopy
  67. GRB 080210, Swift-BAT refined analysis
  68. GRB 080210: Super-LOTIS observations
  69. GRB 080210: Swift-XRT Refined Analysis
  70. GRB 080210: VLT redshift
  71. GRB 080210: Rapid PROMPT Detections
  72. GRB 080210: GOND detection in all bands and redshift upper limit
  73. GRB 080207: GROND upper limits
  74. GRB 080205: GAO 150cm telescope Optical limit
  75. GRB 080207, Swift-BAT refined analysis
  76. GRB 080207: Optical limits from Gemini-South
  77. GRB 080205: RTT150 optical observations
  78. Swift detection of AX J1749.1-2639
  79. GRB 080207: Super-LOTIS observations
  80. GRB 080207, Swift-BAT refined analysis
  81. GRB080207: RTT150 Optical Observations
  82. GRB 080207: REM NIR observations
  83. GRB080207: Swift/UVOT refined analysis
  84. GRB 080207: Swift-XRT Refined Analysis
  85. Konus-Wind observation of GRB 080204
  86. GRB 080205 optical upper limit
  87. GRB 080205: MASTER optical observation
  88. GRB 080205: optical observation
  89. VLA radio upper limit on GRB 080205
  90. INT+WFC R-band observations of GRB 080205
  91. GRB 080205, Swift-BAT refined analysis
  92. GRB 080205: Swift XRT refined analysis
  93. GRB 080205: OA evolution from KAIT observations
  94. GRB 080205: Swift/UVOT observations
  95. Swift-BAT Trigger #302454, correction of GCN notice, update on AX J1749.1-2639
  96. GRB 080130: Swift-BAT refined analysis
  97. GRB 080130: further Swift XRT observations confirm fading source
  98. GRB 080129: Swift/UVOT Refined Upper Limits
  99. Swift/UVOT observations of GRB080130
  100. GRB 080130: REM NIR observations

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