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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"

28173 results found.

  1. GRB 060428B: MDM Observations
  2. GRB060428B: Swift XRT Team refined analysis
  3. GRB 060427B: IPN localization of a short hard burst
  4. GRB 060428B: Refined analysis of the Swift-BAT burst
  5. GRB 060428B: Xinglong I-band limit
  6. GRB 051117A: Bright host galaxy not confirmed
  7. GRB060428A: Swift/UVOT observations.
  8. GRB060428B, optical observation
  9. GRB 060428A: Refined analysis of the Swift-BAT burst
  10. GRB 060428b : Kiso R-band limit
  11. GRB 060428b: Optical afterglow candidate
  12. GRB060428A: Swift XRT Team refined analysis
  13. GRB 060428B: Swift detection of a burst
  14. GRB 060427: NIR observations
  15. GRB060427: Xinglong optical Observations
  16. GRB 060428: Swift detection of a burst
  17. GRB 060427: Swift/UVOT upper limits.
  18. GRB 060427: Refined analysis of the Swift-BAT burst
  19. GRB060427: Swift XRT Team refined analysis
  20. GRB060418: Swift XRT Team Further Refined Analysis
  21. GRB060425:MASTER survey observations
  22. GRB 060427, optical observation
  23. GRB 060427: Swift detection of a burst
  24. GRB060418: Further Analysis of MIKE Spectroscopy
  25. GRB 060424: Refined analysis of the Swift-BAT burst
  26. GRB 060421: TTT Observations
  27. GRB060421: Swift/UVOT observations
  28. GRB 060421: Swift-BAT Refined Analysis
  29. GRB 060421: Swift-XRT refined analysis
  30. GRB 060418: prediction of t_break
  31. GRB(?) 060421: Swift detection of a burst
  32. Erratum of GCN 4983 for GRB 060418 IR follow-up
  33. GRB 060418 : IR afterglow observations
  34. GRB 060418: Radio Observations
  35. GRB060418, BVRcIc field calibration
  36. GRB060418: Swift/UVOT Observations
  37. GRB060418: Optical Observations
  38. GRB 060418: Refined Analysis of the Swift-BAT burst
  39. GRB 060418, SMARTS continuing afterglow observations
  40. GRB 060418, SMARTS optical/IR afterglow observations
  41. GRB060418 : LT optical afterglow observation
  42. GRB 060418: REM candidate afterglow
  43. GRB 060418: Swift detection of a burst with bright x-ray and optical afterglow
  44. GRB060413: Swift/UVOT upper limits
  45. GRB 060413: REM NIR Observations
  46. GRB 060413: Refined analysis of the Swift-BAT burst
  47. GRB 060403: MITSuME optical observation
  48. GRB060403: Optical Limit
  49. GRB060403: XRT refined analysis
  50. GRB 060403: Swift/UVOT upper limits
  51. SGR 1900+14: BAT observations
  52. GRB 060403: Refined analysis of the Swift-BAT burst
  53. Konus-Wind observation of the recent SGR 1900+14 activity. Will
  54. GRB 060403: Swift detection of a burst
  55. HETE trigger H4044: RTT150 optical observations
  56. GRB060331: Swift/UVOT upper limits
  57. Swift XRT observations of the HETE transient H4043
  58. H4043, an unusual high-energy transient observed by HETE
  59. GRB 060322: LNA optical limit
  60. SGR 1900+14: bright burst detected by Konus-Wind on March 28
  61. INTEGRAL and XMM ToO observations of SGR1900+14
  62. SGR 1900+14: Swift-BAT detection of a bright outburst
  63. GRB 060323 : WIDGET simultaneous optical observations
  64. GRB 060323: Early optical observation at Xinglong
  65. GRB 060322: Confirmation of Swift XRT afterglow
  66. GRB060323: NOT optical observations
  67. GRB 060322: IAC80 optical observations
  68. GRB 060322: Swift XRT afterglow candidate
  69. GRB060323: P60 Observations
  70. GRB 060323: Swift/UVOT Observations
  71. GRB 060323: optical afterglow confirmed
  72. GRB060323: NOT observations
  73. GRB 060323: Optical Observations
  74. GRB 060323: Refined analysis of the Swift-BAT burst
  75. GRB 060323: optical observations at TNG
  76. GRB 060323: BVRI observations at Tautenburg, aftreglow candidate
  77. GRB 060322: Refined analysis of the Swift-BAT burst
  78. GRB060323, optical observation
  79. GRB060323 - SDSS Pre-Burst Observations
  80. GRB 060323: Swift detection of a burst with a possible optical afterglow
  81. GRB 060322: Swift-BAT detection of a 200-sec burst
  82. GRB 060218/SN 2006aj, LNA optical observation
  83. GRB060218: Refined photometric calibration of comparison stars
  84. GRB 060319: WHT K-band candidate afterglow
  85. GRB060319: Swift/UVOT upper limits
  86. GRB 060319: Swift-BAT refined analysis
  87. GRB 060319 optical observations at TNG
  88. GRB060319 : Liverpool Telescope optical limit
  89. GRB060319 - SDSS Pre-burst Observations
  90. GRB060313: Radio Observations
  91. GRB 060313: early afterglow NIR upper limits with REM
  92. GRB 060313: Further analysis of the Swift-BAT bright short hard burst
  93. GRB 060313: Swift/UVOT Observations
  94. GRB 060313: Refined analysis of the Swift-BAT bright short hard burst
  95. GRB 060313, SMARTS optical counterpart?
  96. GRB 060313, SMARTS optical/IR observations
  97. GRB060313: optical and near infrared observations with REM
  98. GRB060218: SARA Observations of SN2006aj
  99. GRB 060312: Refined analysis of the Swift-BAT burst
  100. GRB 060218/SN 2006aj, high resolution spectra

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