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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"

16324 results found.

  1. GRB 180510B: VLT/X-shooter observations
  2. GRB 180510B: TAROT La Silla observatory optical observations
  3. GRB 180510B: Swift detection of a burst with an optical counterpart
  4. GRB 180504A: Swift/UVOT Upper Limits
  5. GRB 180504A: NOT afterglow candidate
  6. GRB 180425A: Swift/UVOT Upper Limits
  7. GRB 180418A: TAROT La Silla observatory early optical observations
  8. GRB 180418A: MITSuME Ishigakijima Optical Observation
  9. GRB 180418A : SQUEAN observations
  10. GRB 180418A: Swift/UVOT Detection
  11. GRB 180418A: Continued RATIR Optical Observations
  12. GRB 180418A: Imaging of the optical afterglow with the 1.3 m DFOT and 3.6 m DOT in ARIES, India
  13. GRB 180418A GROND observations
  14. GRB 180418A: Xinglong TNT optical upper limit
  15. GRB 180418A: NOT optical observations
  16. GRB 180418A: Gemini-North imaging and spectroscopy
  17. GRB 180418A: 1.5m OSN optical observations
  18. GRB 180418A: RATIR Optical Observations
  19. LIGO/Virgo G299232: LOFAR follow-up
  20. GRB 180418A: LCO FTN afterglow confirmation
  21. GRB 180418A: KAIT Optical Afterglow Candidate
  22. GRB 180411A: Swift/UVOT Upper Limit
  23. GRB 180411A: Tautenburg observations
  24. GRB 180410A: RATIR Optical Observations
  25. GRB 180410A: Swift/UVOT Upper Limits
  26. GRB 180410A: MITSuME Akeno optical upper limits
  27. GRB 180402A: ISON-NM early optical limits
  28. Swift Trigger 823014: TAROT Calern observatory optical observations
  29. GRB 180404A: LCO FTS observations
  30. GRB 180404B: MASTER-OAFA OT observation
  31. GRB 180404A: MASTER-OAFA OT observation
  32. GRB 180404A: VLT/X-shooter redshift
  33. GRB 180404B: Swift detection of a burst with an optical counterpart
  34. GRB 180404A: Swift detection of a burst with an optical afterglow
  35. GRB 180402A: Swift/UVOT Upper Limits
  36. GRB 180402A: KAIT Optical Upper Limit
  37. GRB 180402A: LCO McDonald observations
  38. GRB 180331B: Swift/UVOT Upper Limits
  39. GRB 180331B: AbAO optical observations
  40. GRB 180329B: LCO FTS observations
  41. GRB 180331A: Swift/UVOT Upper Limits
  42. GRB 180329B: VLT/X-shooter spectroscopic observations
  43. GRB 180329B: RATIR Optical Observations
  44. GRB 180329B: NOT optical afterglow detection
  45. GRB 180329B: Swift detection of a burst with an optical afterglow
  46. GRB 180325A: VLT/X-shooter spectroscopic observations
  47. GRB 180325A: further NOT observations
  48. GRB 180325A: GROND observations
  49. GRB 180325A: Global MASTER-Net OT prompt observations
  50. GRB 180325A: TAROT Calern observatory optical observations
  51. GRB 180325A: D50 early optical follow-up
  52. GRB 180325A: Optical Photometry with SLKT
  53. GRB 180325A: RATIR Optical Observations
  54. GRB 180325A: prompt REM optical/NIR detection
  55. GRB 180325A: NOT redshift
  56. GRB 180325A: prompt LT observations
  57. GRB 180325A: Swift detection of a burst with an optical counterpart
  58. GRB 180324A: Swift/UVOT Upper Limits
  59. GRB 180324A: RATIR Optical Observations and Possible Afterglow Detection
  60. GRB 180324A: KAIT Optical Upper Limit
  61. GRB 180316A: RATIR Optical Observations
  62. GRB 180316A: MITSuME Akeno optical upper limits
  63. GRB 180316A: MITSuME Okayama optical upper limits
  64. GRB 180316A: TSHAO optical observations
  65. GRB 180316A: RATIR Optical Observations, Possible Re-brightening
  66. GRB 180316A: Swift/UVOT Detection
  67. GRB 180316A: RATIR Optical Observations
  68. GRB 180316A: LCO Cerro Tololo observations
  69. GRB 180314A: MITSuME Okayama optical upper limits
  70. GROND observations of GRB 180316A
  71. GRB180316A: MASTER-IAC optical detection
  72. GRB 180314B: RATIR Optical Observations
  73. GRB 180314B: Zeiss-1000/CrAO optical upper limit
  74. GRB 180314B: Swift/UVOT Upper Limits
  75. GRB 180314A: TAROT La Silla observatory optical observations
  76. GRB 180314A: LCO Siding Springs observations
  77. GRB 180314A: VLT/X-shooter redshift
  78. GRB 180314A: REM optical/NIR observations
  79. GRB 180314A: MASTER-Net OT dtetction
  80. GRB180314A: GROND detection of the afterglow
  81. GRB 180314A: Swift detection of a burst with an optical counterpart
  82. GRB 180311A: Swift/UVOT Upper Limits
  83. GRB 180305A: RATIR Optical Observations
  84. GRB 180305A: Swift/UVOT Upper Limits
  85. GRB 180305A: Mondy optical observations
  86. GRB 180305A: RATIR Optical Afterglow Candidate
  87. GRB 180224A: OASDG optical observations
  88. GRB 180224A: AbAO optical observations
  89. GRB 180224A: RATIR Optical Observations
  90. GRB180224A: Global MASTER-Net bright OT detection
  91. GRB 180224A: Swift detection of a burst with an optical counterpart
  92. MAXI J1813-095 source: AbAO optical observations
  93. GRB 180222A: Swift/UVOT Upper Limits
  94. Swift trigger 811074 (possible GRB 180221A): Swift refined analysis
  95. GRB 180205A: Mondy optical observations
  96. GRB180221A: MASTER-OAFA optical observations
  97. Swift trigger 810300: MASTER-OAFA robotic report
  98. GRB 180205A: SEDM Observations
  99. GRB 180205A: BAO optical observations
  100. GRB180205A: Optical observations with DOAO 1m telescope

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