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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').
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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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

27649 results found.

  1. GRB 170207A: AstroSat CZTI detection
  2. Konus-Wind observation of GRB 170208A
  3. GRB 170208B: GROND observations
  4. GRB 170206C: POLAR Observation
  5. GRB 170208B: NOT upper limits
  6. GRB 170208B: Swift-XRT refined Analysis
  7. GRB 170208B: Etelman observatory optical observations
  8. GRB 170208A: Fermi GBM Detection
  9. GRB 170208B: Swift detection of a burst
  10. GRB 170208A: Swift detection of a burst
  11. GRB 170207A: Fermi GBM observation
  12. IPN Triangulation of GRB 170207A (long/very bright)
  13. GRB 170206B: Swift/UVOT Upper Limits
  14. GRB 170206A: POLAR observation
  15. GRB 170206B: Swift-BAT refined analysis
  16. GRB 170206B: Swift-XRT refined Analysis
  17. GRB 170206B: Swift detection of a burst
  18. GRB 170206A: Fermi-LAT detection
  19. GRB 170206A: Fermi GBM observation
  20. GRB 170205A: Swift/UVOT Detection of a Fading Afterglow
  21. Konus-Wind observation of GRB 170205A
  22. GRB 170205A: Swift-BAT refined analysis
  23. GRB 170205A: NOT afterglow observations
  24. GRB 170205A: Swift-XRT refined Analysis
  25. GRB 170205A: RATIR Optical and NIR Observations
  26. Fermi GBM trigger 508010837/170205755 is not a GRB
  27. Fermi GBM trigger 507959893/170205165 is not a GRB
  28. Konus-Wind observation of GRB 170202A
  29. GRB 170205A: Swift detection of a burst with an optical counterpart
  30. GRB 170202A: SQUEAN Observation (2nd night)
  31. GRB 170131A: POLAR Observation
  32. GRB 170202A: Zadko observatory - Gingin optical observations
  33. GRB 170202A: Etelman Observatory optical observations
  34. GRB 170203A: Swift-BAT refined analysis
  35. GRB 170202A: Swift-BAT refined analysis
  36. GRB 170202A: RATIR Optical and NIR Observations
  37. GRB 170202A: SQUEAN Observation
  38. GRB 170202A: Swift-XRT refined Analysis
  39. GRB 170202A: T100 observations
  40. GRB 170202A: Xinglong 2.16m photometry and spectroscopic redshift
  41. GRB 170202A: Swift/UVOT Detection
  42. GRB 170203A: Swift detection of a burst
  43. GRB 170202A: NOT afterglow observations
  44. GRB 170202A: Zadko observatory - Gingin optical observations
  45. GRB 170202A: MASTGlobal ER-Net bright OT nonmonotonic light curve
  46. GRB 170202A: Mini-MegaTORTORA upper limits
  47. GRB 170202A: Swift detection of a burst with an optical afterglow
  48. GRB 170131A: Swift/UVOT Upper Limits
  49. GRB 170131A: Swift-XRT observations
  50. GRB 170131A: Fermi GBM observation
  51. GRB 170131A: Swift ToO observations
  52. GRB 170131A detected in Swift/BAT ground processing
  53. LIGO/Virgo G270580: Las Cumbres Observatory Follow-up Observations
  54. GRB 170130A: POLAR Observation
  55. GRB 170127B: Swift-BAT refined analysis
  56. GRB 170127A: Swift-BAT refined analysis
  57. GRB 170127C: POLAR Observation
  58. GRB 170127A: GROND Upper limits
  59. GRB 170127C: AstroSat CZTI detection
  60. GRB 170127B: Swift-XRT refined Analysis
  61. GRB 170124A: POLAR Observation
  62. GRB 170127A: Swift-XRT refined Analysis
  63. GRB 170126A, Swift-BAT refined analysis
  64. GRB 170124A: CALET Gamma-Ray Burst Monitor detection
  65. Swift Trigger 735413 is not an astrophysical event
  66. GRB 170127B: Swift/UVOT Upper Limits
  67. GRB 170127A: Swift/UVOT Upper Limits
  68. GRB 170127B: Fermi GBM observation
  69. Konus-Wind observation of GRB 170126A
  70. GRB 170127C (Fermi/GBM trigger 507173752): AGILE analysis
  71. GRB 170127C: Fermi-LAT detection
  72. GRB 170127C: Fermi GBM detection
  73. LIGO/Virgo G270580: HAWC follow-up observations
  74. GRB 170127B: MASTER-Kislovodsk early optical observations
  75. GRB 170127B: Swift detection of a short burst
  76. GRB 170127A: Swift detection of a burst
  77. GRB 170126A: AstroSat CZTI detection
  78. GRB 170126A: Swift-XRT refined Analysis
  79. GRB 170126A: Swift/UVOT Detection of a Fading Afterglow
  80. GRB 170126A: Fermi GBM observation
  81. LIGO/Virgo G270580: Fermi GBM Observations
  82. GRB 170126A: Swift detection of a burst with an optical counterpart
  83. LIGO/Virgo G270580: MAXI/GSC observations
  84. GRB 170121B: MASTER early optical observations of the Swift possible XT
  85. LIGO/Virgo G270580: CALET Observations
  86. GRB 170121B: AstroSat CZTI detection
  87. GRB 170121B: Swift-XRT and UVOT observations
  88. LIGO/Virgo G268556/GW170104: MAXI/GSC observations
  89. GRB 170121B: Fermi GBM detection
  90. GRB 170121B/Fermi trigger 506702667 MASTER-Amur OT detection
  91. GRB 170121A: POLAR Observation
  92. GRB 170120A: POLAR Observation
  93. LIGO/Virgo G270580: Fermi-LAT search for a high-energy gamma-ray counterpart
  94. LIGO/Virgo G270580: INTEGRAL search of temporally coincident prompt hard X-ray
  95. LIGO/Virgo G270580: Swift-XRT sources
  96. LIGO/Virgo G270580: Swift/BAT data search
  97. LIGO/Virgo G270580: Mini-MegaTORTORA follow-up observations
  98. LIGO/Virgo G270580: Observations of initial skymap by Project Mini-GWAC of SVOM
  99. LIGO/Virgo G270580: AGILE MCAL and Super-AGILE Observations
  100. LIGO/Virgo G268556: RATIR Observation of iPTF Candidates

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