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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"

16306 results found.

  1. GRB 190114B: Liverpool Telescope near-IR observations
  2. GRB 190114B: optical afterglow observations in Mondy and Abastumani observatories
  3. GRB 190114B: Swift/UVOT Upper Limits
  4. GRB 190114A: Swift/UVOT Observations
  5. GRB 190114A: Mondy optical afterglow detectio
  6. GRB 190114C: Optical observations
  7. GRB 190114C: A type 1 BdHN with TeV emission
  8. GRB 190114B: NOT optical counterpart
  9. GRB190109B: MITSuME Akeno optical upper limits
  10. GRB 190114C: X-shooter observations of a highly extinguished afterglow
  11. GRB 190114C: refined redshift by the 10.4m GTC
  12. GRB 190114C: Fermi GBM detection
  13. GRB 190114B: MITSuME Akeno optical upper limits
  14. GRB 190114B: GWAC-F60B upper limit
  15. GRB 190114C: OASDG optical observations
  16. GRB 190114A: NOT optical observations
  17. GRB 190114B: Mondy optical afterglow detection
  18. GRB 190114C: NOT optical counterpart and redshift
  19. GRB 190114B: BOOTES-4/MET optical afterglow detection
  20. GRB 190114C: MASTER 4-polarizations filters OT detection
  21. GRB 190114C: MASTER afterglow Detection
  22. GRB 190114C: Swift detection of a very bright burst with a bright optical counterpart
  23. GRB 190114A: OSN Detection
  24. GRB 190103B: Swift/UVOT Upper Limits
  25. GRB 190114A: VLT/X-shooter redshift
  26. Correction to GCN Circular 23663: GRB 190109A: Swift UVOT Upper Limits
  27. GRB 181228A: FRAM-ORM optical limit
  28. GRB 190106A: GMG continued observation
  29. GRB 190106A: OSN Afterglow Observations
  30. GRB 190109B: Swift/UVOT Upper Limits
  31. GRB 190109A: Swift/UVOT Upper Limits
  32. GRB 190106A: optical observations, possible jet break detection
  33. GRB 190106A: Liverpool Telescope observations
  34. Correction to the GCN circ. 23654 / GRB 190109B: Mondy optical upper limit
  35. GRB 190109B: COATLI Optical Observations
  36. GRB 190109B: BOOTES-5/JGT optical observations
  37. GRB 190109B: Mondy optical upper limit
  38. INTEGRAL Weak#8189: AROMA-N Optical Observation
  39. GRB190109A: MITSuME Akeno optical upper limits
  40. GRB 190106A: Mondy optical observations
  41. GRB 190106A : continued TSHAO optical observations
  42. GRB 190106A: NEXT-0.6m and Xinglong-2.16m photometric single powerlaw decay
  43. IERCOO/ICSP optical observation of GRB 190106A
  44. GRB 190106A: GMG photometry in the 2nd night
  45. GRB 190106A: VLT/X-shooter redshift confirmation
  46. GRB 190106A: GMG spectral results
  47. GRB 190106A: OASDG optical observations
  48. GRB 190106A: BOOTES-4/MET optical observations
  49. GRB 190106A: Bassano Bresciano Observatory optical detection
  50. GRB 190106A: Xinglong-2.16m spectroscopy
  51. GRB 190106A: GWAC-F60B optical detection
  52. GRB 190106A : TSHAO optical observations
  53. GRB 190106A: GMG detection
  54. GRB 190106A: MITSuME Akeno optical observation
  55. GRB 190106A: MASTER Amur OT detection
  56. GRB 190106A: Swift detection of a burst with an optical counterpart
  57. SWIFT GRB190106.57 Global MASTER-Net OT detection
  58. IceCube-190104A: MASTER optical observation
  59. GRB 190103B: Bassano Bresciano observatory upper limit
  60. GRB 181201A: photometric signature of the SN
  61. GRB 181231A: BOOTES-2/TELMA optical observations
  62. GRB 181228A: Mondy and AbAO optical upper limits
  63. GRB 181228A: Global MASTER Net OT is the same REM IR transient
  64. GRB 181228A: possible NOT optical detection
  65. GRB 181228A: MITSuME Akeno optical upper limits
  66. GRB 181228A: Xinglong-2.16m optical upper limit
  67. FRB 181228: Global MASTER Net optical inspection
  68. GRB 181222B: Swift follow-up observations of MASTER optical transient J204928.79+245744.0
  69. GRB 181228A: Swift/UVOT Upper Limits
  70. GRB 181228A: TSHAO optical upper limit
  71. GRB 181228A: Global MASTER Net OT detection
  72. GRB 181228A: REM NIR detection
  73. GRB 181225A: KAIT Follow-Up Observations with Upper Limit
  74. GRB 181228A: KAIT Optical Upper Limit
  75. GRB 181225A: Global MASTER Net optical observations
  76. GRB 181222B: Global MASTER Net observations of short bright Fermi GRB
  77. GRB 181222B: Global MASTER Net observations of the short bright Fermi GRB error box.
  78. GRB 181213A: Swift/UVOT Observations
  79. GRB 181213A: Mondy optical observations
  80. GRB 181213A: continued TSHAO optical observations
  81. GRB 181213A: AbAO optical observations
  82. GRB 181213A: HMM-0.5m, NEXT-0.6m, CNEOST-1m optical observations
  83. GRB 181213A: NOT optical observations
  84. GRB 181213A: GWAC-F60A upper limit
  85. GRB 181213A : TSHAO optical observations
  86. GRB181213A: Swift/UVOT Detection
  87. GRB 181213A: BOOTES-5/JGT optical observations
  88. GRB 181126B: KAIT Follow-Up Observations of a Fermi Short GRB (Trigger 564897175)
  89. GRB 181201A: continued optical observations in Mondy
  90. MASTER OT J063515.49-624002.9 of Fermi trigger 565936249: optical observations in SAAO
  91. MASTER: OTs detection during Fermi alert trigger 565936249 early observations
  92. GRB 181201A: VLA detection
  93. GRB 181201A: ALMA detection of a fading mm afterglow
  94. GRB 181126B: Zwicky Transient Facility Follow-Up of a Fermi Short GRB (Trigger 564897175)
  95. GRB 181201A: continued optical observations in TSHAO and Chilesope
  96. GRB 181203A: BOOTES-3/YA optical observations
  97. GRB181201A: Optical afterglow measurements by GROWTH-India
  98. GRB 181201A: continued optical observations in TSHAO
  99. GRB 181203A: Swift/UVOT Upper Limits
  100. GRB 181201A: Continued GROND observations show that afterglow is still bright

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