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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"

21012 results found.

  1. GRB 070913: SMARTS optical/IR observations
  2. GRB 070913: TAROT La Silla observatory optical observations
  3. GRB 070913: Swift detection of a burst
  4. GRB 070911: PAIRITEL IR Observations
  5. GRB 070809: Confirmation of optical transient
  6. Observations of possible TAROT GRB transient near IC 4779
  7. GRB 070810b: Image Subtraction of Multiple Keck Observations
  8. Las Campanas observations of possible TAROT GRB transient near IC
  9. Orphan GRB candidate in IC 4779 at TAROT La Silla observatory
  10. GRB 070731: Swift/UVOT Upper Limit
  11. GRB 070805: UVOT afterglow candidate retraction
  12. GRB070810b: optical candidate
  13. GRB 070810B : Faulkes Telescope South Observations
  14. GRB 070810A: Continued Keck Imaging
  15. GRB 070810B: Keck spectroscopy of possible host galaxies
  16. GRB070810B: Swift/UVOT Upper Limits
  17. GRB070810B: Optical observations with KANATA
  18. GRB 070809: Swift/UVOT Upper Limits
  19. GRB 070810: ROTSE-III Detection of Optical Counterpart
  20. GRB 070808: Swift/UVOT upper limits
  21. GRB 070808 : Faulkes Telescope South Observations
  22. GRB070808: Optical observations with KANATA
  23. GRB070808 - SDSS Pre-Burst Observations
  24. GRB061121A: PROMPT Observations
  25. GRB070805 XRT and UVOT afterglow candidate
  26. Swift/UVOT observations of GRB070805
  27. UVOT observations of SAXJ1810.8-2609
  28. GRB 070802: REM optical observations
  29. GRB 070724B: Swift-XRT afterglow confirmation
  30. GRB070802: Swift/UVOT upper limits
  31. GRB 070802: Confirmation of the optical afterglow
  32. GRB 070802: GROND J band candidate
  33. GRB 070802: LCO optical observations
  34. GRB 070729: LCO optical imaging
  35. GRB070729: Swift/UVOT upper limits
  36. GRB 070729: Magellan NIR Observations
  37. GRB 070724B: P60 Observations
  38. GRB 070724B: Swift/UVOT Upper limits
  39. GRB070721A: Swift/UVOT Detection of a Weak Afterglow
  40. GRB 070724B: Swift-XRT afterglow likely candidate
  41. GRB 070721A: optical observations
  42. GRB 070724A: further VLT observations
  43. Four radio sources in Swift-XRT error box of GRB 070724
  44. GRB 070724: optical observations
  45. GRB070724: Host galaxy redshift
  46. GRB 070724: P60 and Gemini Observations
  47. GRB 070724: IR observations
  48. Short-Hard GRB070714B: PROMPT Observations
  49. GRB 070721B: further observations and analysis
  50. GRB 070714B: Keck observations
  51. GRB 070721B: optical observations and proposed redshift
  52. Swift/UVOT observations of GRB070721B optical afterglow.
  53. Swift/UVOT Observations of GRB070721A
  54. GRB 070721B : Faulkes Telescope South observations
  55. GRB070714B: TNG NIR observations
  56. GRB 070714A: Swift/UVOT Upper limits
  57. GRB 070714B: Swift/UVOT Upper Limits
  58. GRB 070714B: confirmation of optical afterglow
  59. GRB 070707: Swift-XRT follow-up observations
  60. SN 2007bg - off-axis GRB?
  61. GRB 070704: RTT150 optical observations
  62. GRB 070707: optical afterglow
  63. GRB 070707: object inside XRT error circle
  64. Swift/UVOT Observations of GRB070707
  65. GRB 070707: VLT observations
  66. GRB 070429B: NIR Observations
  67. GRB070704: FAVOR optical observations
  68. GRB 070704 : Liverpool Telescope Observations
  69. GRB 070611: VLT observations
  70. Swift/UVOT Observations of GRB070704
  71. GRB 070628 Swift-UVOT Refined Analysis
  72. GRB 070628: NIR detection of afterglow
  73. GRB 070628: TAROT La Silla observatory optical observations
  74. GRB 070628: Watcher Observations
  75. Swift UVOT Observations of GRB 070628
  76. GRB 070628: Swift detection of a possible burst
  77. GRB 070612A: Allen Telescope Array Observations
  78. OT20050728 was not an optical GRB afterglow
  79. INTEGRAL burst GRB070615: X-ray continued observations
  80. GRB 070616 : WIDGET simultaneous optical observations
  81. GRB 070612A: Second Epoch WSRT Radio Observations
  82. GRB070621: RTT150 optical observations
  83. GRB 070621: VLT optical observations
  84. GRB 070621: Swift/UVOT Upper Limits
  85. Keck Laser Guide Star Adaptive Optics Imaging of GRB 070621
  86. WHT observations of GRB070621
  87. GRB 070621: Gemini South optical imaging
  88. Observations of GRB070612A at Calar Alto
  89. GRB 070621: NOT observations
  90. GRB070621: OPTIMA-Burst optical upper limit
  91. GRB 070621: TAROT Calern observatory optical observations
  92. GRB 070621: Watcher Observations
  93. GMRT upper limit of GRB 070610/SWIFT J195509.6+261406 in 610 MHz
  94. GRB 070612A: TNG optical observations
  95. Swift/UVOT detection of GRB070616 optical afterglow.
  96. GRB070612A: Gemini Spectroscopic Redshift
  97. GRB 070612A: NOT observations
  98. GRB 070612A: Possible WSRT Radio Detection
  99. GRB 070616: BTA optical observations
  100. Swift/UVOT observations of GRB070616

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