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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"

32762 results found.

  1. GRB 090515: PAIRITEL Upper Limits
  2. GRB 090515: KAIT optical upper limits
  3. GRB 090515: ROTSE-III Optical Limits
  4. GRB 090510: Suzaku WAM observation of the prompt emission
  5. GRB 090510, Radio limits
  6. GRB090510: VLT/FORS2 spectroscopic redshift
  7. GRB 090510: GROND observations
  8. GRB 090510: Swift/UVOT host galaxy candidates
  9. GRB 090510: Fermi-LAT follow-up analysis
  10. GRB 090509, further Swift-BAT refined analysis
  11. GRB 090510: correction to GCN 9344
  12. Konus-Wind observation of GRB 090510
  13. AGILE detection of GRB 090510
  14. GRB 090510: UVOT refined analysis
  15. GRB 090510: Swift XRT refined analysis
  16. GRB 090510: correction to coordinates in GCN 9338
  17. GRB 090510: NOT afterglow confirmation
  18. GRB 090510: Swift-BAT refined analysis
  19. GRB 090510: Fermi GBM detection
  20. GRB 090509: Swift-BAT refined analysis
  21. GRB 090509, SMARTS optical/IR afterglow observations
  22. GRB 090510: Swift/UVOT Detection of a Candidate Optical Afterglow
  23. GRB 090408: optical upper limit
  24. GRB 090418A: optical observation
  25. GRB 090509: GROND further analysis and redshift limit
  26. GRB 090509: REM NIR afterglow
  27. GRB 090509: GROND afterglow candidate
  28. GRB 090323: optical observations
  29. GRB 090423: optical limit
  30. GRB 090423: 250 GHz upper limit for a z=8.2 GRB with MAMBO-2 at the IRAM 30m
  31. GRB 080913: 250 GHz upper limit for a z=6.7 GRB with MAMBO-2 at the IRAM 30m
  32. GRB 090424: optical observations
  33. GRB 090427: GROND observations
  34. GRB 090429A: ROVOR magnitude limit
  35. ICSP VLF observation of GRB090427 from two receivers
  36. ICSP VLF observation of GRB090424 from four receivers
  37. Refined analysis of ICSP VLF observation of SGR J1550-5418 bursts on 22nd January, 2009
  38. GRB 090428B: Suzaku WAM observation of the prompt emission
  39. GRB 090424, SMARTS optical/IR afterglow monitoring
  40. GRB 090426: optical observations
  41. GRB 090429B: Swift/UVOT Upper Limits
  42. GRB 090429A: Swift/UVOT Upper Limits
  43. GRB 090429B: Gemini-N further nIR observations
  44. GRB 090424: YNAO-GMG observations
  45. GRB 090429A: Swift-XRT refined analysis
  46. GRB 090429A: GROND upper limits
  47. GRB 090429B: Swift XRT refined analysis
  48. Konus-Wind observation of very bright GRB 090427
  49. GRB 090418A BVRcIc field calibration
  50. GRB 090426: GAO 150cm telescope Optical Observation
  51. GRB 090429B: RIMOTS optical upper limits
  52. GRB 090429B: Swift-BAT refined analysis
  53. GRB 090429A: Swift-BAT refined analysis
  54. GRB 090429A - Correction to XRT position
  55. GRB090429B: Gemini-N infrared IR candidate
  56. GRB 090426: YNAO-GMG observations
  57. GRB 090429B: VLT upper limits
  58. GRB 090429B: GROND Observations
  59. GRB 090429B: Super-LOTIS early observations
  60. GRB 090429: Swift detection of a burst
  61. GRB 090423: pseudo burst at z=1 and its relation to GRB 080913
  62. GRB 090424 : Multiband Optical observation from Nainital
  63. GRB 090426: R-band limit
  64. GRB 090424: Continued R-band monitoring
  65. GRB 090423: CARMA mm observations
  66. GRB 090426: Swift/BAT spectral lag results
  67. GRB 090424: Suzaku WAM observation of the prompt emission
  68. GRB 090426: VLT spectroscopy
  69. GRB 090426: GROND Observations of the Optical/NIR Afterglow
  70. GRB 090426: Near infrared observation with ISLE at OAO
  71. GRB 090426: Okayama MITSuME optical observation
  72. GRB090426 Swift/UVOT observations
  73. GRB 090426 Keck LRIS redshift
  74. GRB 090426: Swift-BAT refined analysis
  75. GRB 090426: Swift-XRT refined analysis
  76. GRB 090423: GROND second epoch imaging and refined SED
  77. Detection of bright radio afterglow of GRB 090424 with the VLA
  78. GRB090426: Observation for Optical counterpart from MIRO
  79. GRB 090426, RIMOTS optical upper limits
  80. GRB 090426: inspection of SDSS images
  81. GRB 090426: TNT confimation of optical counterpart
  82. GRB090424: R-band detection (37.5 hrs post-burst), jet break?
  83. GRB 090424: MASTER-Net prompt optical limit
  84. GRB 090423: Fermi GBM observation (correction of isotropic equivalent energy)
  85. GRB 090424: WHT ISIS spectroscopy
  86. VLA radio observation of high-z GRB 090423
  87. GRB090424: BVRI/R-band detection after 15 hrs burst
  88. GRB 090424 : Lulin 1m telescope optical observations
  89. GRB 090424: GROND Observations of the Optical/NIR Afterglow
  90. GRB090423: Y-band limit
  91. GRB 090424 Gemini-South Redshift
  92. GRB 090423: Y-band field calibration update/correction
  93. GRB 090423: Swift/BAT spectral lag results
  94. GRB 090424 : TAOS optical detection
  95. GRB 090424 optical observations
  96. GRB 090424: Liverpool Telescope observations
  97. GRB 090424: Swift-XRT refined analysis
  98. GRB 090424: Optical observations from 1.23m CAHA
  99. GRB 090423: energetic, luminosity and jet break
  100. Swift/UVOT observations of GRB 090424

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