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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"

21022 results found.

  1. GRB 091117: TNG optical observations
  2. GRB 091117A: Swift/UVOT followup observations
  3. GRB 091117: 2nd epoch of Magellan optical observations
  4. GRB 091117: VLA radio observations
  5. GRB 091117: Swift-XRT observations
  6. GRB091117: Gemini South Observations
  7. GRB 091117: Swift XRT refined analysis
  8. GRB 091117: Gemini-North spectroscopy of DSS galaxy
  9. Konus-Wind observations of GRB 091117A
  10. GRB 091117: Magellan optical observations
  11. GRB 091117: XRT source coincident with a DSS galaxy
  12. GRB 091117: OSN I-band observations
  13. Konus-Wind and Konus-RF observations of GRB 091031
  14. GRB 091111: BOOTES-3 contemporaneous imaging
  15. GRB 091111: BOOTES-3 observations
  16. GRB 091109A: GROND and VLT observations
  17. GRB 091109B: Swift/UVOT Upper Limits
  18. GRB 091109B: VLT afterglow confirmation
  19. GRB 091109B: VLT observations
  20. GRB 091109b: Magellan Observations
  21. GRB 091109B: Optical limits from Watcher
  22. GRB 091109: BOOTES-3 observations
  23. GRB 091109: Swift/UVOT observations
  24. GRB 091109: Faulkes Telescope South observations
  25. GRB 091029: Observations from Stardome Observatory
  26. GRB 091104: Swift/UVOT Upper Limits
  27. GRB 091102: LABOCA/APEX submm observations
  28. Fermi LAT Upper Limits on GRB 091010
  29. GRB 091102: Swift/UVOT Upper Limits
  30. GRB 091102: GROND Upper Limits
  31. GRB 091102: BOOTES-3 observations
  32. GRB 091102: Swift/XRT localization
  33. GRB 091024: optical observations
  34. GRB 090926a, SMARTS optical/IR afterglow observations
  35. GRB 091018: Skynet/PROMPT Observations of Possible Host Galaxy
  36. GRB 091029, SMARTS optical/IR afterglow observations
  37. GRB 091018, SMARTS optical/IR afterglow observations
  38. GRB091029: Swift/UVOT observations
  39. GRB 091029: Skynet/PROMPT Continued Observations of Fading
  40. GRB 091029: BOOTES-3 observations
  41. GRB091024 optical observations
  42. GRB 091029: Skynet/PROMPT Observations of Peak and Fading
  43. GRB 091029: GROND Detection of the Optical/NIR Afterglow
  44. GRB 091024: Keck/LRIS Spectroscopy
  45. GRB 091024: YNAO-GMG observations
  46. GRB 091026: GROND Upper Limits
  47. GRB 091020: Late TLS detection
  48. Radio afterglow detection from GRB 091020
  49. GRB 091026: Swift/UVOT Upper Limits
  50. GRB 091024: Burst was outside the Swift-BAT FOV after T0(BAT)+460sec
  51. Konus-Wind and Konus-RF observations of GRB 091024
  52. GRB 091020 : Xinglong TNT upper limit
  53. GRB 091024: TLS Upper Limit
  54. GRB 091024: KAIT optical afterglow observations
  55. GRB 091024: Super-LOTIS early observations
  56. GRB091024: VRcIc Afterglow Observations
  57. GRB 091024: Fermi GBM Observations
  58. GRB 091024: Xinglong TNT optical observation
  59. GRB 091024 : Faulkes Telescope North - Afterglow Confirmation
  60. GRB 091024 Gemini-North redshift
  61. GRB 091024: GRAS004 optical observations
  62. GRB 091024: Faulkes Telescope North Afterglow Candidate
  63. GRB 091018: Skynet/PROMPT Continued Observations of Fading
  64. GRB 091020: Additional Lick observations
  65. Konus-Wind observations of GRB 091020 (correction to GCN 10057)
  66. GRB 091020: Lick observations
  67. Konus-Wind observations of GRB 091010
  68. GRB091020 Swift/UVOT observations
  69. GRB 091020: MASTER optical transient polarimetry
  70. GRB 090926A: Late-time Gemini South Observations and Possible Jet Break
  71. GRB 091018: miniTAO/ANIR Observations
  72. GRB 091018: Skynet/PROMPT Observations of Fading
  73. GRB 091018 : Faulkes Telescope South Observations
  74. GRB 091018: BOOTES-3 observations
  75. GRB091018: Swift/UVOT observations
  76. GRB 091018: GROND observations
  77. GRB091018: Magellan Echellette Observations
  78. GRB 091018: ROTSE-III Detection of Optical Counterpart
  79. GRB 091015: Skynet/PROMPT Observations
  80. GRB 091003: Possible Supernova Component
  81. GRB 091003: Gemini-N redshift of possible host galaxy
  82. GRB 091015: RTT150 optical observations
  83. GRB 090726 R band observations
  84. GRB 090815: a faint long GRB localized by INTEGRAL
  85. GRB 091010: Swift-XRT refined analysis
  86. Radio observation of GRB090927 with ATCA
  87. Radio observation of GRB090926a with ATCA
  88. GRB 091010: Faulkes Telescope North observations
  89. GRB 090531A: Skynet/PROMPT Observations
  90. GRB 091010: RXTE detection
  91. Konus-Wind observations of GRB 091010
  92. GRB 091010 optical upper limits
  93. GRB 091010: Swift/UVOT Upper Limits
  94. GRB 090926A: Skynet/PROMPT Observations of Day 6 - 11 Fading
  95. GRB 090518: Skynet/PROMPT Observations
  96. Short-Duration GRB 090621: Skynet/Dolomiti Observations
  97. GRB 090904A: afterglow confirmation
  98. GRB 090812: Skynet/PROMPT and GORT Observations
  99. GRB 091003: Lick observations and possible SDSS host galaxy
  100. GRB 090926B: Skynet/PROMPT Observations

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