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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"

16141 results found.

  1. GRB 140320C: Swift-XRT detection of the X-ray afterglow
  2. GRB 140320B: Swift-XRT detection of the afterglow
  3. GRB 140320C: Mondy optical observations
  4. GRB 140320C: MASTER optical observations
  5. GRB 140320C: FTN optical observations
  6. GRB 140320B: ISON-NM optical observations
  7. GRB 140320B: FTN optical afterglow candidate
  8. GRB 140318A: Continued RATIR Optical and NIR Observations
  9. GRB 140318A: Mondy optical limit
  10. GRB 140318A: Swift/UVOT Upper Limits
  11. GRB 140311B: Mondy optical limit
  12. GRB 140311A: Mondy optical limits
  13. GRB 140318A: Liverpool Telescope optical observations
  14. GRB 140318A: RATIR Optical and NIR Detections
  15. GRB140318A: Discovery Channel Telescope Optical Detection
  16. GRB 140318A: NOT detection of the afterglow
  17. GRB 140311A: VLA Detection
  18. GRB 140311C: MASTER optical observations
  19. GRB 140311C: Swift-XRT and UVOT observations
  20. GRB 140311C: MASTER before, during and after trigger optical observations
  21. GRB 140311A: further NOT observations
  22. GRB 140311A: RATIR Optical and NIR Detection
  23. GRB 140311C: Fermi GBM Detection
  24. GRB 140311A: Montarrenti Observatory optical upper limit
  25. Fermi416242156: possible iPTF counterpart
  26. GRB 140311B: RATIR Optical and NIR Observations
  27. GRB 140311A: Bassano Bresciano Observatory optical upper limit
  28. GRB 140311A: Gemini-North redshift
  29. GRB 140311A: NOT redshift confirmation
  30. GRB 140311A: Gemini-South redshift
  31. GRB 140311A: Enhanced Swift-XRT position
  32. GRB 140311A: Nanshan afterglow decay
  33. GRB 140311B: TAROT Calern observatory optical observations
  34. GRB 140311A: Optical follow-up observation with Kottamia 188cm telescope
  35. GRB 140311A: NOT observations of the optical afterglow
  36. GRB 140311A: Zadko observatory - Gingin optical observations
  37. GRB 140311B: MASTER early optical observations
  38. GRB 140311A: Nanshan OT detection
  39. GRB 140311A: MASTER early optical observations
  40. GRB 140304A: Continued RATIR Optical and NIR Observations
  41. GRB 140304A: 10.4m GTC refined redshift z = 5.283
  42. GRB 140304A: CARMA 3mm detection
  43. GRB 140304A: VLA Detection
  44. GRB 140304A: Redshift from the NOT
  45. GRB 140304A: 10.4m GTC redshift z = 5.39
  46. GRB 140304A: NOT observations and redshift estimate
  47. GRB 140304A: Swift/UVOT Upper Limits
  48. GRB 140304A: Khureltogot optical observations
  49. GRB 140304A: Mondy optical observations
  50. GRB 140304A: Afterglow decay from Nanshan observations
  51. GRB 140304A: MASTER OT detecton
  52. GRB 140301A: Swift/UVOT Upper Limits
  53. GRB 140302A: Swift/UVOT Upper Limits
  54. GRB 140302A: MITSuME Okayama upper limits
  55. GRB 140301A: GROND Detection of the Optical/NIR Afterglow
  56. GRB 140301A: VLT/X-shooter redshift
  57. GRB 140301A: NOT afterglow candidate
  58. GRB 140301A: Skynet R-COP Observations
  59. GRB 140226A/iPTF14yb: 1.23m CAHA observations
  60. GRB 140226A/iPTF14yb: Swift/UVOT Observations
  61. GRB 140226A/iPTF14yb: Mondy optical observations
  62. GRB 140226A/iPTF14yb: RATIR Optical and NIR Observations
  63. GRB 140226A / iPTF14yb: Swift-XRT confirms a fading X-ray source
  64. GRB 140219A: Mondy optical observations of XRT source #5
  65. Konus-Wind observation of GRB 140226A
  66. IPN triangulation of GRB 140226A, a possible GRB counterpart to iPTF14yb
  67. PTF14yb: GROND Transient Detection
  68. iPTF14yb: RATIR Optical and NIR Observations of the optical transient
  69. iPTF14yb: iPTF Discovery of an Optical Afterglow-like Transient
  70. GRB 140219A: the confirmation of the brightening SDSS J102406.41+062937.6 star
  71. GRB 140219A: MASTER optical brightening inside XRT-5 error box detection
  72. GRB 140219A: iPTF optical observations
  73. GRB 140102A: TAOS early optical afterglow detection
  74. GRB 140219A: optical observations of XRT source #5
  75. GRB 140219A: Xuyi and Nanshan upper limits
  76. GRB 140219A: results from Swift XRT and UVOT tiled observations
  77. GRB 140219A: MASTER before and after GRB observational arguments of the exceptionally Dark GRB
  78. GRB 140213A: Continued Skynet R-COP/PROMPT Observations of the Optical Afterglow
  79. GRB 140215A: RAPTOR Observations During Gamma-Ray Emitting Interval
  80. GRB 140213A: Continued Skynet R-COP/PROMPT Detections of a Rebrightening Optical Afterglow
  81. GRB 140215A: Continued Skynet PROMPT Observations of the Optical Afterglow
  82. GRB 140215A: WSRT radio observation
  83. GRB 140211A: Khureltogot optical upper limits
  84. GRB 140215A: Continued RATIR Optical and NIR Observations
  85. GRB140215A: Continued Discovery Channel Telescope Observations
  86. GRB 140215A: Continued RATIR Optical and NIR Observations
  87. GRB 140215A: MITSuME Okayama Optical Observation
  88. GRB 140215A: ISON-NM optical observations
  89. GRB 140215A: P60 observations
  90. GRB 140215A: T24 optical observations
  91. GRB 140215A: RATIR Optical and NIR Observations
  92. GRB140215A: Skynet PROMPT Optical Observations
  93. GRB 140215A: KAIT Optical Detection
  94. GRB140215A: Prompt Observations with Discovery Channel Telescope
  95. GRB 140215A: Swift detection of a burst with optical counterpart
  96. GRB140206A: Discovery Channel Telescope Optical Detection
  97. GRB 140213A: Swift/UVOT Observations
  98. GRB140213A: VLT/X-shooter redshift
  99. GRB 140213A: GROND Detection of the Optical/NIR Afterglow
  100. GRB 140213A: Skynet R-COP Detection of Optical Afterglow

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