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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"

19694 results found.

  1. GRB 140516A: RATIR Optical and NIR Observations
  2. GRB 140516A: Subaru NIR imaging observations
  3. GRB 140516A: 6 GHz upper limit
  4. GRB 140516A: Gemini-North limit on an optical afterglow
  5. GRB 140516A: Swift/UVOT Upper Limits
  6. GRB 140516A: Swift-BAT refined analysis
  7. GRB 140516A: Swift-XRT refined Analysis
  8. GRB 140516A: NOT optical observations
  9. GRB 140516A: Enhanced Swift-XRT position
  10. GRB 140516A: ISON-Kislovodsk optical observations
  11. GRB 140516A: TNG optical observations
  12. GRB 140516A: Swift detection of a short burst
  13. GRB 140515A : TNG near-infrared observations
  14. GRB 140515A: GROND observation of the afterglow
  15. GRB 140515A: Gemini-North imaging
  16. GRB 140515A: Swift/UVOT Upper Limits
  17. GRB 140515A: MITSuME Akeno upper limits
  18. GRB 140515A: Enhanced Swift-XRT position
  19. GRB 140515A: Gemini-N redshift
  20. GRB 140515A: Swift detection of a burst
  21. GRB 140512A: Continued UVOT Observations
  22. GRB 140508A: Mondy upper limit
  23. GRB 140508A: MITSuME Akeno Optical observation
  24. GRB140512A : GROND observations
  25. GRB 140512A: Enhanced Swift-XRT position
  26. Swift Observations of GRB 140508A
  27. GRB 140512A: Optical observations from the 2.5 m NOT
  28. GRB 140428A: GROND afterglow confirmation
  29. GRB 140512A: Mondy optical detection
  30. GRB 140512A: Swift detection of a burst with an optical counterpart
  31. GRB 140508A: Continued RATIR Optical and NIR Observations
  32. Fermi GBM Trigger 140429551 - Detection of a burst from SGR 1806-20
  33. GRB 140508A: Swift/UVOT Detection
  34. GRB 140509A: Swift/UVOT Detection and photo-z
  35. GRB 140509A: Swift-XRT refined Analysis
  36. GRB 140508A: RATIR Optical and NIR Observations
  37. GRB 140508A: Optical Observations via Virtual Telescope
  38. GRB 140509A: Enhanced Swift-XRT position
  39. GRB 140508A: Swift-XRT observations
  40. GRB 140508A: WHT spectroscopy
  41. GRB 140509A: Swift detection of a burst with an optical counterpart
  42. GRB 140508A: 1.23m CAHA BVRI-band observations
  43. IPN triangulation of GRB 140508A
  44. GRB 140430A: MITSuME Akeno upper limits
  45. GRB 140502A: ISON-NM early optical limit
  46. GRB 140506A: Swift/UVOT Detection
  47. GRB 140506A: VLT/X-shooter spectroscopy
  48. GRB 140506A: Enhanced Swift-XRT position
  49. GRB 140506A: Swift detection of a burst with an optical counterpart
  50. GRB 140430A: iTelescope.Net T16 Optical Observation
  51. GRB 140430A: r'-band STELLA-I observations
  52. GRB 140502A: Swift/UVOT Upper Limits
  53. GRB 140502A: MITSuME Okayama upper limits
  54. GRB 140502A: Enhanced Swift-XRT position
  55. GRB 140430A: BVR-band IAC80 observations
  56. Swift Trigger 597860 is probably not a GRB
  57. GRB 140502A: Swift detection of a burst
  58. GRB 140430A: Further VATT Optical Observations
  59. GRB 140430A: Swift/UVOT Observations
  60. GRB 140430A: Enhanced Swift-XRT position
  61. GRB 140428A: GROND observations
  62. GRB140430A: Swift detection of a burst with an optical counterpart
  63. GRB 140428A: Swift/UVOT Upper Limits
  64. GRB 140423A: RTT150 optical observations
  65. Trigger 597570: Swift detection of SGR 1806-20
  66. GRB 140428A: 1.5m OSN I-band detection
  67. GRB 140428A: NOT observations
  68. GRB 140428A: Swift-XRT detection of a source
  69. GRB 140423A: Continued RATIR Optical and NIR Observations
  70. GRB 140423A: MITSuME Akeno Optical observation
  71. GRB 140413A: GROND Afterglow Confirmation
  72. DG CVn: optical observations
  73. GRB 140423A: RATIR Optical and NIR Observations
  74. GRB 140423A: NOT Afterglow Observations
  75. GRB 140423A: Nishi-Harima NIR Observations
  76. GRB 140423A: TNG NIR observations
  77. GRB 140423A pODI/WIYN afterglow photometry
  78. GRB 140423A, Optical Observations
  79. GRB 140423A: Kanata/HONIR Optical and NIR Observations
  80. GRB 140423A: MITSuME Okayama Optical Observation
  81. Swift Trigger 596958 is positionally consistent with V* DG CVn/2XMM J133146.4+291635
  82. Swift Trigger 596958 is probably the flare star: DG CVn
  83. GRB 140423A: Enhanced Swift-XRT position
  84. GRB 140423A: Nanshan optical upper limit
  85. GRB 140423A: KWFC z-band photometry
  86. GRB 140419A, LOAO R-band observations
  87. GRB 140423A: Swift-XRT observations
  88. GRB 140423A: optical afterglow candidate
  89. GRB 140419A: Mondy optical observations
  90. GRB 140419A: Continued RATIR Optical and NIR Observations
  91. GRB 140419A: Continued RATIR Optical and NIR Observations
  92. Swift Trigger 596641 is not a GRB
  93. GRB 140419A, Optical Observations
  94. GRB 140419A: MITSuME Ishigakijima Optical Observation
  95. GRB 140419A: MITSuME Okayama Optical Observation
  96. GRB 140419A: Swift UVOT refined analysis
  97. GRB 140419A: Enhanced Swift-XRT position
  98. GRB 140419A: RATIR Optical and NIR Observations
  99. GRB 140419A: ROTSE-III Detection of Optical Counterpart
  100. GRB 140419A: Swift detection of a burst with optical afterglow

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