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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"

16273 results found.

  1. GRB 141130A: Mondy optical observations
  2. GRB 141130A: Swift detection of a burst with an optical counterpart
  3. GRB 141121A: Continued RATIR Optical Observations
  4. GRB 141121A: Mondy optical observations
  5. GRB 141121A: TSHAO optical observations
  6. GRB 141121A: Continued RATIR Optical Observations
  7. GRB 141121A: RATIR Optical Observations - Errata for GCN 17105
  8. GRB 141121A: MITSuME Ishigakijima Optical Observation after 7 days
  9. GRB 141121A: Khureltogot optical observations
  10. GRB 141121A: Mondy optical observations
  11. GRB 141121A: RATIR Optical and NIR Observations
  12. GRB 141121A: three epochs of SAO RAS optical observations
  13. GRB 141121A: Continued RATIR Optical Observations
  14. GRB 141121A: WSRT radio detection
  15. GRB 141121A: TSHAO optical observations
  16. GRB 141121A: Continued Mondy optical observations
  17. GRB 141121A: Continued RATIR Optical Observations
  18. GRB 141121A: RATIR Optical Observations - Steeper Fading
  19. GRB 141121A: AMI 15 GHz detection
  20. GRB 141121A: MITSuME Ishigakijima Optical Observation after 3 days
  21. GRB 141124A​: iPTF upper limits​
  22. GRB 141121A: RATIR Optical Observations - Fading Again
  23. GRB 141118A: Fermi GBM Detection
  24. GRB 141121A: Mondy optical observations
  25. GRB 141121A: LCO-FTN rebrightening confirmation
  26. GRB 141121A: MITSuME Ishigakijima Optical Observation
  27. GRB 141121A: Continued RATIR Optical Observations - Rebrightening
  28. GRB 141121A: AAO optical observations
  29. GRB 141121A: MITSuME Akeno Optical observation
  30. GRB 141121A: Continued RATIR Optical Observations
  31. GRB 141121A: Swift/UVOT Detections
  32. GRB 141121A: RATIR Optical Observations
  33. GRB 141121A: LCO-FTN observations
  34. GRB 141118A: iPTF Optical Observations
  35. GRB 141109A: further VLA observations
  36. GRB 141109A: VLA detection
  37. Trigger 618634: Swift detection of Vela X-1
  38. GRB 141109B: optical upper limits
  39. GRB 141015A: TAROT La Silla observatory optical observations
  40. GRB 141022A: TAROT La Silla observatory optical observations
  41. GRB 141031A: TAROT La Silla observatory optical observations
  42. GRB 141109A: TAROT La Silla observatory optical observations
  43. GRB 141109A: AAO optical observations
  44. GRB 141109B: Swift/UVOT Upper Limits
  45. GRB 141109A: Swift/UVOT Detection
  46. GRB 141109A: NOT r-band observation
  47. GRB 141109B: MITSuME Akeno upper limits
  48. GRB141109A : Xinglong TNT optical observation
  49. GRB 141109A: MITSuME Ishigakijima upper limits
  50. GRB 141109B: BOOTES-4 and TERSKOL optical upper limit
  51. GRB 141109A: CQUEAN Detection at 0.85 - 1.05 micron
  52. GRB 141109A: GROND afterglow observation
  53. X-shooter redshift of GRB 141109A
  54. GRB 141109A: REM NIR candidate afterglow
  55. GRB 141104A: Swift-XRT observations
  56. GRB 141028A: Mondy optical observations
  57. GRB 141026A: CrAO optical observation
  58. GRB
  59. GRB 141026A: Gemini-North optical and NIR imaging
  60. GRB 141028A: TShAO optical observation
  61. GRB 141031B: TShAO optical observations
  62. GRB 141017A: Skynet PROMPT-CTIO/SSO Observations
  63. GRB 141022A: Skynet PROMPT-CTIO Observations
  64. GRB 141026A: VLA observations
  65. GRB 141031B: RATIR Optical and NIR Observation
  66. GRB 141031B: Swift/UVOT Upper Limits
  67. MAXI GRB 141029A is likely an X-ray flare from 1RXS J043657.1-161258
  68. GRB 141031B: Bassano Bresciano Observatory upper limit
  69. GRB 141031B: NOT optical observations
  70. GRB 141031B: MITSuME Ishigakijima upper limits
  71. GRB 141031A: Swift/UVOT Upper Limits
  72. GRB 141031B: TShAO optical upper limit
  73. GRB 141031A: Skynet PROMPT-CTIO Observations
  74. GRB 141004A: Continued Late Time RATIR Optical and NIR Observations
  75. GRB 141031A: VLT/X-shooter optical observations
  76. GRB 141031B: Nanshan optical upper limit
  77. GRB 141031B: MASTER early optical observations
  78. GRB 141031A: GROND detection of a possible optical afterglow candidate
  79. GRB 141029A: Nanshan optical upper limit
  80. GRB 140509A: GROND afterglow detection
  81. GRB 141028A: Continued RATIR Observations
  82. GRB 141028A: P60 Observations and Decay Index
  83. GRB 141028A: Swift-XRT observations
  84. GRB 141028A: LCOGTN observations
  85. GRB 141028A: VLT/X-shooter redshift of z=2.33
  86. GRB 141028A: RATIR Optical and NIR Observations
  87. GRB 141028A: Swift/UVOT Detection
  88. GRB 141028A: GROND Afterglow confirmation (MASTER source)
  89. GRB 141020A: Continued Mondy Observations, optical upper limit
  90. GRB 141026A: IRAM 30m millimetre observations
  91. GRB 141026A: Continued RATIR Optical and NIR Observations
  92. GRB 141026A: Skynet PROMPT-CTIO/Yerkes-41 Observations
  93. GRB 141026A: Continued RATIR Optical and NIR Observations
  94. GRB 141026A: Swift/UVOT Upper Limits
  95. GRB 141004A: Continued RATIR Late Time Optical and NIR Observations
  96. GRB 141026A: Continued RATIR Optical and NIR Observations, Afterglow Detection
  97. GRB 141026A: MASTER early optical observations
  98. GRB141026A: Deep P200 optical imaging
  99. GRB 141026A: 1.23m CAHA I-band observations
  100. GRB 141026A: GROND observations

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