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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"

41963 results found.

  1. GRB060502: Super-LOTIS Observations
  2. GRB 060502: P60 Afterglow Confirmation
  3. GRB 060502: Swift detection of a burst with an optical counterpart
  4. GRB 060501: MDM Observations
  5. GRB060501: Super-LOTIS observations
  6. GRB060501: P60 imaging and afterglow candidate
  7. GRB060501: Swift XRT position
  8. GRB 060501: ROTSE-III Optical Limits
  9. GRB 060501: Swift detection of a burst
  10. Konus-Wind observation of GRB 060427B
  11. GRB060428B - SDSS Pre-Burst Observations
  12. GRB060428B: optical observation
  13. GRB060428B: possible detection of an optical counterpart by Swift/UVOT.
  14. GRB 060428B: MDM Observations
  15. GRB 060428A: PROMPT Observations
  16. GRB 060427B: MASTER optical observations
  17. GRB060428B: Swift XRT Team refined analysis
  18. GRB 060427B: IPN localization of a short hard burst
  19. GRB 060428B: Refined analysis of the Swift-BAT burst
  20. GRB 060428B: Xinglong I-band limit
  21. GRB 060428B: KAIT observations
  22. GRB060425:MASTER optical limit
  23. GRB 051117A: Bright host galaxy not confirmed
  24. GRB060428A: Swift/UVOT observations.
  25. GRB060428B, optical observation
  26. GRB 060428A: Refined analysis of the Swift-BAT burst
  27. GRB 060428b : Kiso R-band limit
  28. GRB 060428b: Optical afterglow candidate
  29. GRB060428A: Swift XRT Team refined analysis
  30. GRB 060428B: Swift detection of a burst
  31. GRB 060427: NIR observations
  32. GRB060427: Xinglong optical Observations
  33. GRB 060428: Swift detection of a burst
  34. GRB 060427: NOT observations
  35. GRB 060427: Swift/UVOT upper limits.
  36. GRB060427: Swift XRT Team refined analysis
  37. GRB060418: Swift XRT Team Further Refined Analysis
  38. GRB060425:MASTER survey observations
  39. GRB 060427, optical observation
  40. GRB 060427: Swift detection of a burst
  41. GRB 060425: IPN localization and KW spectrum of a short, hard burst
  42. An interactive program for GRB pseudo-redshift computations
  43. GRB060424: optical afterglow detection
  44. GRB060418: Further Analysis of MIKE Spectroscopy
  45. GRB 060424: Refined analysis of the Swift-BAT burst
  46. GRB 060424: Swift detection of a burst
  47. GRB 060421: TTT Observations
  48. OT 060420: Likely Not a New Cosmic Transient
  49. No OT 060420 in MASCOT images
  50. Swift-BAT detection of Mrk 421
  51. OT 060420: CONCAM detection of a candidate new magnitude 5 optical
  52. GRB060421: Swift/UVOT observations
  53. GRB 060421: Swift-XRT refined analysis
  54. GRB 060418: prediction of t_break
  55. GRB060418: optical observations
  56. Konus-Wind observation of GRB 060418
  57. GRB(?)060421 : XRT position
  58. GRB(?) 060421: Swift detection of a burst
  59. Erratum of GCN 4983 for GRB 060418 IR follow-up
  60. GRB 060418 : IR afterglow observations
  61. GRB 060418: JHKs PAIRITEL Observations of Afterglow
  62. GRB 060418: Radio Observations
  63. GRB060418, BVRcIc field calibration
  64. GRB060418: Swift/UVOT Observations
  65. GRB060418: Optical Observations
  66. GRB 060418: FRAM early afterglow observation
  67. GRB 060418: Refined Analysis of the Swift-BAT burst
  68. VLT/UVES observations of GRB060418
  69. GRB060418: Swift XRT Team Refined Analysis
  70. GRB 060418, SMARTS continuing afterglow observations
  71. GRB 060418: PROMPT Detections
  72. GRB 060418, SMARTS optical/IR afterglow observations
  73. GRB060418: Magellan/MIKE Spectroscopic Redshift
  74. GRB 060418: REM candidate afterglow
  75. GRB 060418: Swift detection of a burst with bright x-ray and optical afterglow
  76. SGR 1900+14: Refined analysis of the Swift-BAT outburst
  77. GRB 060413: REM NIR Observations
  78. SGR 1900+14: Swift detection of an outburst
  79. GRB 060413: Watcher UBVR observations
  80. GRB 060413: XRT refined analysis
  81. GRB 060413: No Optical Afterglow in Swift/UVOT TDRSS Data
  82. GRB 060413: Swift detection of a burst
  83. GRB060403: optical observations
  84. GRB 060403 Optical observations
  85. GRB 060403: MITSuME optical observation
  86. GRB060403: Optical Limit
  87. GRB060403: XRT refined analysis
  88. GRB 060403: Swift/UVOT upper limits
  89. HETE Triggers H4043 and H4044 Not Due to New Cosmic Source
  90. SGR 1900+14: BAT observations
  91. GRB060403: Swift XRT refined position
  92. Konus-Wind observation of the recent SGR 1900+14 activity. Will
  93. GRB 060403: Swift detection of a burst
  94. HETE trigger H4044: RTT150 optical observations
  95. GRB060331: Swift/UVOT upper limits
  96. H4044, a Repeat Outburst From The Source of H4043 (="GRB060331")
  97. Swift XRT observations of the HETE transient H4043
  98. H4043, an unusual high-energy transient observed by HETE
  99. GRB 060322: LNA optical limit
  100. SGR 1900+14: bright burst detected by Konus-Wind on March 28

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