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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"

45741 results found.

  1. GRB 130418A: SMARTS optical/IR afterglow observations
  2. GRB 130418A: Submm observations from SMA
  3. GRB 130419A, Swift-BAT refined analysis
  4. GRB 130327B: Swift/XRT source is not the afterglow
  5. GRB 130419B (Swift trigger Trigger 553930): MASTER-Net optical observations
  6. Trigger 553930: Swift detection of a possible flare from HR 5110
  7. GRB 130418A: LOAO Observation
  8. GRB 130418A, Swift-BAT refined analysis
  9. GRB 130419A: Swift detection of a burst
  10. GRB130418A: VLT/X-shooter redshift confirmation
  11. GRB 130418A: REM NIR observations
  12. GRB 130418A: RATIR Optical and NIR Observations
  13. GRB 130418A: CARMA 3mm detection
  14. GRB 130418A: GROND detection of the optical-NIR afterglow
  15. GRB130418A: OSN 1.5m fading afterglow detection
  16. GRB 130418A: Swift/UVOT Detection and request for continuing coverage
  17. GRB 130418A: Enhanced Swift-XRT position
  18. GRB 130418A: TAROT Calern and TAROT la Silla observatory optical observations
  19. GRB 130418A: TNG optical observations
  20. GRB 130418A: Redshift from 10.4m GTC
  21. GRB 130418A: Bassano Bresciano Observatory optical observations
  22. GRB 130418A: 1.23m I-band observations
  23. GRB 130418A: Swift detection of a burst with an optical counterpart
  24. GRB 130408A: Suzaku WAM observation of the prompt emission
  25. GRB 130408a: Skynet Optical Observations
  26. GRB 130408A: SMARTS optical/IR afterglow observations
  27. GRB 130408A, Swift-BAT refined analysis
  28. GRB 130408A: Zadko observatory - Gingin optical observations
  29. GRB 130407A: Swift-XRT observations
  30. GRB130408A: Swift/UVOT followup observations
  31. GRB 130408A: Swift-XRT refined Analysis
  32. Konus-Wind observation of GRB 130408A
  33. GRB 130408A: Enhanced Swift-XRT position
  34. GRB 130408A - Gemini-S/GMOS redshift determination
  35. GRB 130408A - VLT/X-shooter redshift determination
  36. GRB 130408A: GROND detection of the afterglow
  37. GRB 130408A: Swift/UVOT Detection of the Optical Afterglow
  38. GRB 130408A: Liverpool Telescope Optical candidate detection
  39. GRB 130408A: Swift detection of a burst
  40. GRB 130407A Tiled Swift observations
  41. GRB 130407A: MAXI/GSC detection
  42. GRB 130211A: Retraction of afterglow candidate
  43. GRB 130327B: Suzaku WAM observation of the prompt emission
  44. Konus-Wind observation of GRB 130320B
  45. Swift detection of IGR J18245-2452
  46. IPN Triangulation of GRB 130320B (very long/bright)
  47. Swift/XRT observation of GRB 130327B
  48. GRB 130327A: RATIR Optical/NIR afterglow confirmation
  49. GRB 130306A: Confirmation of the X-ray Afterglow
  50. GRB 130310A: RATIR Observations
  51. Swift Trigger 552142 is a noise event
  52. Konus-Wind observation of GRB 130327B
  53. GRB 130327B: Fermi-LAT detection of a burst
  54. GRB 130327B: Fermi GBM detection
  55. Swift Trigger 552142: a possible GRB
  56. GRB 130327B: gamma-ray detection by AGILE
  57. GRB 130327A: Swift-BAT refined analysis
  58. GRB 130327A: Gemini Observations
  59. GRB 130327A: Swift-XRT refined Analysis
  60. GRB 130327A: Weihai optical obsevations
  61. GRB 130327A: Swift/UVOT Upper Limits
  62. Konus-Wind observation of GRB 130325A
  63. GRB 130327A: ISON-NM optical upper limit
  64. GRB 130325A Tiled Swift observations
  65. GRB 130327A: Enhanced Swift-XRT position
  66. GRB 130327A: RATIR Optical and NIR Observations
  67. GRB 130327A: PAIRITEL NIR Afterglow Candidate
  68. GRB 130325A: Fermi LAT detection
  69. GRB 130327A: Swift detection of a burst
  70. report: GRB 130315A: Zadko observatory - Gingin optical observations
  71. GRB 130325A: Fermi GBM detection
  72. Konus-Wind observation of GRB 130320A
  73. IPN Triangulation of GRB 130320A (long/very bright)
  74. GRB 130305A: Gemini follow-up observations
  75. GRB 130315A: GROND afterglow candidate
  76. GRB 130305A: optical upper limit in Mondy observatory
  77. GRB 130315A: Swift/UVOT Upper Limits
  78. GRB 130313A: optical upper limit in CrAO
  79. GRB 130313A: optical upper limit in Mondy observatory
  80. GRB 130315A: SALT optical observations
  81. GRB130313A: GTC early optical limits
  82. GRB 130313A: 5.8 GHz VLA upper limit
  83. GRB 130315A: Swift-XRT refined Analysis
  84. Swift XRT observations of GRB 130310A
  85. GRB 130315A, Swift-BAT refined analysis
  86. GRB 130313A: Swift/UVOT Upper Limits
  87. GRB 130305A: PTF P48 optical upper limits
  88. GRB130315A BOOTES-3 optical limit
  89. GRB 130315A: Swift detection of a burst
  90. GRB 130310A : Suzaku WAM observation of the prompt emission
  91. GRB 130305A: TLS Tautenburg observations
  92. GRB 130313A: RATIR Optical and NIR Observations
  93. GRB 130313A: TNG optical observations
  94. GRB 130313A: Fading X-ray Afterglow
  95. Swift-BAT trigger 551030 is not astrophysical
  96. GRB 130215A: Detection of the SN with the 10.4m GTC
  97. GRB130313A: Optical observations from GTC
  98. GRB 130313A: NOT optical upper limit
  99. GRB 130313A: Swift-XRT refined Analysis
  100. GRB 130313A: simultaneous and follow-up optical observations at BOOTES-3 and BOOTES-4

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