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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"

27029 results found.

  1. IPN error boxes for GRB991229
  2. GRB 991216: J band spectrophotometry
  3. GRB 991216: Detection of the Host and/or Absorber Galaxy
  4. IPN error boxes for GRB991221
  5. GRB 991216 RXTE ASM Observations
  6. IPN error box for GRB991216
  7. GRB 991217 (SAX J2303.2+0015) Optical observations
  8. Chandra observation of the X-ray afterglow of GRB991216
  9. GRB 991216 Optical spectroscopy/imaging
  10. VLT spectra of GRB991216
  11. GRB991216 Optical and IR observations
  12. K observations of GRB991216
  13. IR observations of GRB991216
  14. GRB991216 radio observations
  15. GRB991216, optical observations
  16. GRB991216 Optical and infrared observations of Beethoven Burst
  17. Refined IPN localization of GRB991216
  18. GRB 991216 Radio Observations
  19. GRB 991208 Keck Spectroscopy
  20. GRB 991208 Infrared Detection
  21. GRB 991216--Summary of RXTE Observations
  22. GRB 991216 Optical Observations
  23. GRB 991216, optical observations
  24. GRB 991208 SAO-RAS Spectroscopy
  25. SAX J2303.2+0015: an x-ray/GRB?
  26. GRB 991216, Optical Transient
  27. GRB991216 ('Beethoven Burst') B, R, and K Observations
  28. GRB 991216: Comparison with DPOSS images
  29. GRB991216 Optical Observations
  30. GRB 991208 optical observations
  31. Lowell/Perkins observation of GRB 991216
  32. GRB 991208 Keck Spectroscopy
  33. GRB 991216: Extremely bright BATSE burst
  34. R-band Observations of GRB991208 at TNG
  35. GRB991208, optical observations
  36. GRB991208 - millimeter detection
  37. GRB 991208, Optical Observation
  38. GRB991208 15-GHz observations
  39. GRB991208, optical observations
  40. GRB 991208 - OVRO detection
  41. GRB 991208 Optical Decay
  42. GRB 991208 optical observations
  43. IPN localization of GRB991208
  44. Optical Observations of GRB991105
  45. GRB991106: BeppoSAX/BATSE results
  46. GRB 991106, optical observations
  47. BeppoSAX NFI Observation of GRB991106
  48. GRB991106: the first BeppoSAX short GRB detection?
  49. GRB 991105: BATSE Observations
  50. BeppoSAX GRB Alert: GRB991106
  51. GRB991105: SAX-GRBM/-WFC detection
  52. BeppoSAX MAIL n. 99/30: GRB991105 refined position (fwd)
  53. GRB ALERT: GRB991105
  54. GRB 991014 - X-ray afterglow identification by BeppoSAX-NFI
  55. GRB 991014, Optical Observations
  56. GRB 991014, Optical Observations
  57. IPN/NFI error box for GRB991014
  58. BeppoSAX ALERT: GRB991014
  59. GRB990907: BeppoSAX follow up and X-ray afterglow
  60. GRB990908, another BeppoSAX-GRBM/WFC burst detection
  61. BeppoSAX MAIL n. 99/24: GRB ALERT: GRB990907
  62. GRB 990712 Late Optical Decay and Host Galaxy
  63. GRB 990712, Optical Observation
  64. GRB990806 BeppoSAX follow up
  65. GRB990806: BATSE Observations
  66. GRB 990806, Optical Observations
  67. GRB990806 UBVRIJHK observations
  68. GRB990806: possible X-ray afterglow, BeppoSAX
  69. BeppoSAX ALERT GRB990806: Summer GRB
  70. GRB 990712 Optical Observations
  71. GRB990705: No Evidence for Neutrino Signal
  72. Late-time HST/STIS Observations of GRB 990510
  73. Refined BeppoSAX-WFC position of GRB990712
  74. Updated Astrometry for the IR Counterpart of GRB990705
  75. GRB 990705, R-band observations
  76. IPN localization of GRB990704
  77. Infrared and Optical Observations of GRB990705
  78. GRB990704: SAX-NFI results summary
  79. GRB990704 radio and optical observations
  80. BeppoSAX GRB990705: possible X-ray afterglow
  81. GRB 990704 X-ray Observations
  82. GRB990705: Intriguing Positional Coincidences
  83. GRB990704
  84. GRB990704, optical observations
  85. GRB990704: possible X-ray afterglow
  86. Identification of a possible optical counterpart for GRB990704
  87. Refined BeppoSAX-WFC position of GRB990704
  88. GRB990704: BeppoSAX detection
  89. BeppoSAX NFI Observation of GRB990627 X-ray afterglow
  90. GRB990627: BeppoSAX-WFC final location
  91. BeppoSAX: GRB990625
  92. Late-time HST/STIS Observation of GRB 990123
  93. GRB 990506 - Optical Observations
  94. GRB 990506 Radio Transient
  95. X-ray/GRB 1SAX J0835.9+5118, Optical Observation
  96. IPN error box for GRB990527
  97. X-ray/GRB 1SAX J0835.9+5118, TNG V and R observations
  98. X-ray/GRB 1SAX J0835.9+5118, BATSE Observation
  99. X-ray/GRB 1SAX J0835.9+5118, Optical Observations
  100. X-ray/GRB 1SAX J0835.9+5118, Optical Observation

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