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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"

26537 results found.

  1. GRB 060807: Refined analysis of the Swift-BAT burst
  2. IPN triangulation of GRB060806 (long, exceptionally bright)
  3. GRB060807 - SDSS Pre-burst Observations
  4. GRB 060805B: X-ray Afterglow Detection, Spectral/Spatial/Temporal Properties
  5. GRB 060805B: Swift/UVOT Upper Limits
  6. GRB 060805: XRT Team Refined Analysis
  7. GRB 060805: Swift-BAT Refined Analysis
  8. GRB 060805 - SDSS Pre-Burst Observations
  9. GRB 060804: Swift UVOT observations
  10. GRB 060804: Refined analysis of the Swift-BAT burst
  11. GRB 060728: Upper limits of the X-ray emission
  12. GRB 060801: no variability of optical sources
  13. GRB060801: Radio Observations
  14. GRB060801: Swift/UVOT Upper Limits
  15. GRB 060801: optical observations at Hanle and Calar Alto
  16. GRB 060801: Swift XRT refined analysis
  17. GRB 060801: Refined analysis of the Swift-BAT short hard burst
  18. GRB 060801, optical observation
  19. GRB060729: ROTSE-III Observations of the Slow Optical Decay
  20. GRB 060719: TORTOREM optical upper limits
  21. GRB 060729: Refined analysis of the Swift-BAT burst
  22. GRB 060729: Swift-XRT refined analysis
  23. GRB 060729: Swift/UVOT Observations
  24. GRB 060728: Refined analysis of the Swift-BAT burst
  25. GRB060614 ATCA Radio Limits
  26. GRB060719: prompt NIR observations with REM
  27. GRB 060719: near-infrared afterglow
  28. GRB 060522: VLA observation
  29. GRB 060719: VLT/ISAAC observations
  30. GRB 060719: Refined analysis of the Swift-BAT burst
  31. GRB 060719: further analysis of VLT observations
  32. GRB 060719: optical limit by Pi-of-the-Sky
  33. GRB060719: FRAM early follow-up limit
  34. GRB 060719: prompt PROMPT observations
  35. GRB060719: REM NIR Observations
  36. GRB 060719: Continued LCO optical observations
  37. GRB 060717: NOT observations
  38. GRB 060714: Refined analysis of the Swift-BAT burst
  39. GRB 060717: Swift-BAT refined analysis
  40. GRB060717 - SDSS Pre-burst Observations
  41. GRB 060714: REM infrared observations
  42. GRB 060714, SMARTS optical/IR afterglow observation
  43. GRB 060714 : Liverpool Telescope Observations
  44. GRB 060714, optical observation
  45. GRB 060712: XRT refined analysis
  46. GRB 060712: Refined analysis of the Swift-BAT burst
  47. GRB060712: MASTER optical observation
  48. GRB120706: MASTER optical observation
  49. GRB 060707: OA fading and redshift
  50. GRB 060708: Swift-XRT refined analysis
  51. GRB 060708: Refined analysis of the Swift-BAT burst
  52. GCN 060707: Swift-UVOT observations
  53. GRB 060707: Swift-XRT refined analysis
  54. GRB 060707: Refined analysis of the Swift-BAT burst
  55. GRB 060614: SMARTS host galaxy observations
  56. GRB 060105: Upper limit on Host Galaxy
  57. GRB060614: Detection of the host galaxy but no supernova emission
  58. GRB 060614: redshift confirmation
  59. GRB 060614: spectroscopy
  60. GRB 060614: pseudo-z from spectral parameters of the prompt emission
  61. Konus-Wind observation of GRB 060614
  62. The Unusually Long-Lived Afterglow of GRB 060614
  63. GRB 060614: optical observations
  64. GRB 060605, optical observations
  65. GRB060614: Watcher observation
  66. GRB 060614: Swift-BAT refined analysis
  67. GRB060614: Swift-XRT refined analysis
  68. GRB 060604, optical observations
  69. GRB 060602A: Swift/XRT analysis
  70. GRB 060607B: Swift-BAT Refined Analysis
  71. GRB060602A: Swift/UVOT upper limits
  72. GRB 060607B: Swift detection of a burst
  73. GRB 060607: Swift-BAT Refined Analysis
  74. GRB 060607: optical limit by "Pi of the Sky"
  75. GRB 060607: Swift-XRT Team refined analysis
  76. GRB 060607: PROMPT Observations
  77. GRB 060605 BAT refined analysis
  78. GRB 060605: Swift-XRT Team refined analysis
  79. SALT spectroscopy of GRB 060605
  80. GRB 060605: ROTSE-III Optical Counterpart
  81. GRB060604: Swift/UVOT detections
  82. GRB 060512: Keck Redshift
  83. GRB 060604 optical photometry
  84. GRB 060604: Swift-XRT Team refined analysis
  85. GRB 060604: BAT refined analysis
  86. GRB 060602B: XMM-Newton Survey Source
  87. GRB 060602B: Swift-XRT Refined Analysis
  88. GRB 060602B: Swift-BAT Refined Analysis
  89. GRB 060602A: Swift-BAT Refined Analysis
  90. GRB 060211A : WIDGET simultaneous optical observations
  91. GRB060602 - SDSS Pre-Burst Observations
  92. GRB 060502A: Optical afterglow observations
  93. GRB 060526: Break in X-ray light curve
  94. GRB 051227 : WIDGET simultaneous optical observations
  95. GRB 051028 : WIDGET pre-trigger limit
  96. GRB 060526: RTT150 optical observations
  97. GRB 060526: Multiple Optical Flares
  98. GRB060526: afterglow fitting and probable jet break
  99. GRB060526: Optical counterpart from MIRO
  100. GRB060502b: optical observations

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