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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.

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

27637 results found.

  1. GRB 170115B: Fermi-LAT detection
  2. GRB 170115B: Fermi GBM detection
  3. GRB 170115A: Swift detection of a burst
  4. GRB 170114A: Fermi GBM detection
  5. GRB 170112B: POLAR observation
  6. GRB 170113A: GROND afterglow observations
  7. GRB 170113A: Swift-BAT refined analysis
  8. GRB 170113A: Swift/UVOT Observations
  9. GRB 170113A: Swift-XRT refined Analysis
  10. GRB 170113A: Fermi GBM observations
  11. GRB 170112A: Swift/UVOT Upper Limits
  12. GRB 170101A: 15 GHz upper limits from AMI
  13. GRB 170113A: Swift detection of a burst with an optical counterpart
  14. LIGO/Virgo G268556: TZAC TAROT network observations with TRE/TCA/TCH
  15. GRB 170112A: RATIR Optical and NIR Observations
  16. GRB 170112A: Swift-BAT refined analysis
  17. GRB 161219B: afterglow and SN2016jca optical observations
  18. GRB 170111A: Swift/UVOT Upper Limits
  19. GRB 170112A: Swift-XRT observations
  20. GRB 170112A: MASTER-OAFA (Argentina) early optical observations
  21. GRB 170112A: REM optical/NIR observations
  22. GRB 170112A: Swift detection of a short burst
  23. GRB 170111A: Swift-BAT refined analysis
  24. GRB 170111A: Swift-XRT refined Analysis
  25. GRB 161230A: POLAR Observation
  26. GRB 170111A: MASTER-OAFA (Argentina) prompt OT observations
  27. LIGO/Virgo G268556/GW170104: Campo Imperatore Observatory observations
  28. GRB 170111A: Swift detection of a burst
  29. LIGO/Virgo G268556: Swift/BAT data search
  30. GRB 170109A: POLAR Observation
  31. LIGO/Virgo G268556: Swift-XRT confirms that ATLAS17aeu is fading in X-rays
  32. Trigger 731535: Swift detection of GRS 1716-249/GRO J1719-24/V2293 Oph
  33. LIGO/Virgo G268556: ATLAS17aeu position is consistent with GRB170105A
  34. Trigger 731257: Another Swift-BAT detection of GRS 1716-249/GRO J1719-24/V2293 Oph
  35. Trigger 731183: Swift detection of GRS 1716-249/GRO J1719-24/V2293 Oph
  36. LIGO/Virgo G268556: CALET Observations
  37. LIGO/Virgo G268556: iPTF Optical Transient Candidates
  38. Discovery Channel Telescope Imaging of ATLAS17aeu (LVCG268556)
  39. LIGO/Virgo G268556: AGILE-GRID preliminary analysis
  40. LIGO/Virgo G268556: Palomar 200-inch detects ATLAS17aeu, possible afterglow of GRB070105A?
  41. Swift Trigger 730874 is not astrophysical
  42. LIGO/Virgo G268556: Swift-XRT detection of ATLAS17aeu
  43. GRB 170105A: AstroSat CZTI detection
  44. LIGO/Virgo G268556: HAWC follow-up of northern sky
  45. PESSTO follow-up of GRB 161219B/SN2016jca
  46. Swift Trigger 730513 is not an astrophysical event
  47. LIGO/Virgo G268556: DESGW/DECam observations
  48. LIGO/Virgo G268556: AGILE MCAL and Super-AGILE Observations
  49. LIGO/Virgo G268556: Fermi-LAT search for high-energy gamma-ray counterpart
  50. LIGO/Virgo G268556: Mini-MegaTORTORA follow-up observations
  51. LIGO/Virgo G211117 / GW151226: LOFAR follow-up
  52. LIGO/Virgo G268556: Swift-XRT sources
  53. LIGO/Virgo G268556: observation regions by Project Mini-GWAC of SVOM
  54. GRB 170102A: Astrosat CZTI detection
  55. GRB170104.78 MASTER-Net OT detection
  56. LIGO/Virgo G268556: INTEGRAL search of temporally coincident prompt hard X-ray emission
  57. LIGO/Virgo G268556: Fermi GBM Observations
  58. Konus-Wind observation of GRB 170101A
  59. GRB 170101B: POLAR observation
  60. Swift trigger 729600 is not an astrophysical event
  61. GRS 1716-249/GRO J1719-24/V2293 Oph, Swift-BAT refined analysis
  62. GRB 170101A: POLAR observation
  63. GRB 161229A: POLAR observation
  64. GRB 170101A: Swift-BAT refined analysis
  65. Trigger 729410: Swift detection of V2293 Oph
  66. GRB 170101B: Astrosat CZTI detection
  67. GRB 170101B: Fermi GBM detection
  68. GRB 170101A: Swift detection of a burst
  69. GRB 161228B: POLAR Observation
  70. GRB 161228A: POLAR Observation
  71. GRB 161214B: MASTER-Kislovodsk early optical observations
  72. GRB 161214A: MASTER-IAC early optical observations
  73. Fermi GBM trigger 504490076/161227005 is not a GRB
  74. GRB 161224A: TSHAO optical observations
  75. GRB 161224A: Swift/UVOT Upper limits
  76. GRB 161224A: Swift-XRT refined Analysis
  77. GRB 161224A: Swift-BAT refined analysis
  78. Trigger 728094, Swift-BAT refined analysis
  79. Swift Trigger 728268: a possible GRB
  80. Fermi GBM trigger 504233075/161224301 is not a GRB
  81. Swift Trigger 728094: a possible GRB
  82. GRB 161219B: POLAR Observation
  83. GRB161219.78 MASTER-Net OT detection
  84. Fermi GBM trigger 504061556/161222046 is not a GRB
  85. Correction to GCN 20323 "Konus-Wind observation of GRB 161219B"
  86. Fermi GBM trigger 504043585/161221838 is not a GRB
  87. GRB 161220A: Swift-BAT refined analysis
  88. GRB 161218B: Astrosat CZTI detection
  89. Konus-Wind observation of GRB 161219B
  90. GRB 161219B: SALT observations
  91. GRB 161219B: VLT/X-shooter redshift
  92. Fermi GBM trigger 503982114/161221126 is not a GRB
  93. GRB 161220A: Swift-XRT refined Analysis
  94. GRB 161220A: GROND Upper Limits
  95. GRB 161217B: POLAR Observation
  96. GRB 161219B: ISON/Terskol optical observations
  97. GRB 161219B: Swift-BAT refined analysis
  98. GRB 161220A: Swift/UVOT Upper Limits
  99. GRB 161219B: Swift/UVOT Detection
  100. IPN Triangulation of GRB 161218B (long/very bright)

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