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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"

24581 results found.

  1. GRB 170208B: GROND observations
  2. GRB 170208B: Swift-XRT refined Analysis
  3. GRB 170208A: Fermi GBM Detection
  4. GRB 170207A: Fermi GBM observation
  5. Konus-Wind observation of GRB 170207A
  6. IPN Triangulation of GRB 170207A (long/very bright)
  7. LIGO/Virgo G270580: Gemini-South Spectroscopic Classification of Optical Transients
  8. Konus-Wind observation of GRB 170206A
  9. GRB 170206A: POLAR observation
  10. IPN Triangulation of GRB 170206A (short/hard)
  11. GRB 170206B: Swift-BAT refined analysis
  12. LIGO/Virgo G270580: ANTARES upper limits
  13. GRB 170206B: Swift detection of a burst
  14. GRB 170206A: Fermi-LAT detection
  15. GRB 170206A: Fermi GBM observation
  16. Konus-Wind observation of GRB 170205A
  17. GRB 170205A: Swift-BAT refined analysis
  18. GRB 170202A: SMARTS optical/IR afterglow observations
  19. GRB 170205A: LCO FTN observations
  20. Konus-Wind observation of GRB 170202A
  21. GRB 170202A: SQUEAN Observation (2nd night)
  22. GRB 170203A: Swift-BAT refined analysis
  23. GRB 170202A: Swift-BAT refined analysis
  24. GRB 170202A: SQUEAN Observation
  25. GRB 170202A: LCO FTN observations
  26. GRB 170202A: T100 observations
  27. GRB 170202A: MITSuME Akeno Optical Observation
  28. GRB 170203A: Swift detection of a burst
  29. GRB 170202A: Kanata optical and infrared observations
  30. GRB 170202A: LCO Sutherland observations
  31. GRB 170202A: MASTGlobal ER-Net bright OT nonmonotonic light curve
  32. GRB 170202A: Mini-MegaTORTORA upper limits
  33. GRB 170202A : Xinglong TNT optical observation
  34. GRB 170202A: Swift detection of a burst with an optical afterglow
  35. GRB 170131A: Swift-XRT observations
  36. GRB 170131A: Fermi GBM observation
  37. GRB 170131A detected in Swift/BAT ground processing
  38. LIGO/Virgo G270580: Las Cumbres Observatory Follow-up Observations
  39. Konus-Wind observation of GRB 170127C (short/hard GRB with extended emission)
  40. GRB 170127B: Swift-BAT refined analysis
  41. GRB 170127A: Swift-BAT refined analysis
  42. GRB 170127C: Swift-XRT observations
  43. GRB 170127A: GROND Upper limits
  44. GRB 170126A, Swift-BAT refined analysis
  45. GRB 170124A: CALET Gamma-Ray Burst Monitor detection
  46. GRB 170127B: Fermi GBM observation
  47. Konus-Wind observation of GRB 170126A
  48. GRB 170127C (Fermi/GBM trigger 507173752): AGILE analysis
  49. GRB 170127C: Fermi-LAT detection
  50. GRB 170127C: Fermi GBM detection
  51. LIGO/Virgo G270580: HAWC follow-up observations
  52. GRB 170127B: MASTER-Kislovodsk early optical observations
  53. GRB 170127B: Swift detection of a short burst
  54. GRB 170127A: Swift detection of a burst
  55. GRB 170126A: Fermi GBM observation
  56. LIGO/Virgo G270580: Fermi GBM Observations
  57. GRB 170126A: Swift detection of a burst with an optical counterpart
  58. LIGO/Virgo G270580: No change to estimate of LIGO false alarm probability
  59. LIGO/Virgo G268556: ANTARES upper limits
  60. GRB 170121B: MASTER early optical observations of the Swift possible XT
  61. LIGO/Virgo G270580: CALET Observations
  62. GRB 170121B: Swift-XRT and UVOT observations
  63. GRB 170121B: LCO FTN observations
  64. GRB 170121B: Fermi GBM detection
  65. GRB 170121B/Fermi trigger 506702667 MASTER-Amur OT detection
  66. LIGO/Virgo G270580: Fermi-LAT search for a high-energy gamma-ray counterpart
  67. LIGO/Virgo G270580: INTEGRAL search of temporally coincident prompt hard X-ray
  68. LIGO/Virgo G270580: Swift-XRT sources
  69. LIGO/Virgo G270580: Swift/BAT data search
  70. LIGO/Virgo G270580: Observations of initial skymap by Project Mini-GWAC of SVOM
  71. LIGO/Virgo G270580: AGILE MCAL and Super-AGILE Observations
  72. LIGO/Virgo G270580 ANTARES search
  73. LIGO/Virgo G270580: Identification of a GW Burst Candidate
  74. Swift Trigger #733426: possible detection of a burst or transient
  75. GRB 170115B: Swift-XRT observations
  76. Konus-Wind observation of GRB 170115B
  77. IPN Triangulation of GRB 170115B
  78. GRB 170115B: AGILE detection
  79. GRB 170115A: Swift-BAT refined analysis
  80. GRB 170115B: Fermi-LAT detection
  81. GRB 170115B: Fermi GBM detection
  82. GRB 170114A: Fermi GBM detection
  83. GRB 170113A: GROND afterglow observations
  84. GRB 170113A: Swift-BAT refined analysis
  85. GRB 170113A: Swift-XRT refined Analysis
  86. GRB 170113A: Fermi GBM observations
  87. GRB 170113A: LCO Sutherland observations
  88. GRB 170113A: Swift detection of a burst with an optical counterpart
  89. GRB 170112A: Swift-BAT refined analysis
  90. GRB 161219B: afterglow and SN2016jca optical observations
  91. GRB 170112A: MASTER-OAFA (Argentina) early optical observations
  92. GRB 170111A: Swift-BAT refined analysis
  93. GRB 170111A: SMARTS optical/IR observations
  94. GRB 170111A: Swift-XRT refined Analysis
  95. LIGO/Virgo G268556: Additional GROWTH follow up observation of iPTF Optical Transient Candidates
  96. LIGO/Virgo G268556: VLA follow-up of iPTF17cw
  97. GRB 170111A: MASTER-OAFA (Argentina) prompt OT observations
  98. LIGO/Virgo G268556: Swift/BAT data search
  99. LIGO/Virgo G268556: Spectroscopic observations of ATLAS17aeu and iPTF17cw
  100. LIGO/Virgo G268556/GW170104: TNG observations of ATLAS17aeu

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