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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.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

36153 results found.

  1. GRB 060206: IR Detection of the Afterglow
  2. GRB 060206: Lick 3m Spectroscopy
  3. GRB 060204A: ROSAT Pointing
  4. GRB 060206: Super-LOTIS observations
  5. GRB060204A: Swift/UVOT observations
  6. GRB 060206: Swift-BAT refined analysis
  7. GRB 060206 : Lulin optical observations
  8. GRB060206: SDSS Pre-Burst Observations
  9. GRB060206: Swift XRT Refined Analysis
  10. GRB060206: Liverpool Telescope observation
  11. GRB 060206: Spectroscopic Redshift
  12. GRB060206: P60 Optical Observations
  13. GRB 060206: KAIT observations
  14. GRB060206: Swift XRT Position
  15. GRB060206: SARA Detection
  16. GRB 060206: RAPTOR observations of afterglow candidate variability.
  17. GRB 060206: High redshift burst
  18. GRB060204a: Swift XRT Detection of an Afterglow Candidate
  19. GRB 060204C: XRT analysis of Swift J061223.0+701243.9
  20. BAT GRB 060204C is probably not a GRB
  21. GRB060204C: optical observation
  22. GRB 060204B: BVRi-band detections of optical afterglow
  23. GRB 060204A: Swift XRT upper limit
  24. GRB 060204A: FRAM optical observations
  25. GRB060204B: Swift/UVOT refined analysis
  26. GRB 060204C: optical observations
  27. Swift XRT Observation of GRB 060204C
  28. GRB 060204B: Swift-BAT refined analysis
  29. GRB 060204B: ART early limit
  30. GRB060204B: Swift XRT Team Refined Analysis
  31. GRB 060204C: OSN limits
  32. GRB 060204b: Keck/LRIS Afterglow Confirmation
  33. GRB 060204C: BOOTES-IR optical limits
  34. GRB 060204C: Liverpool Telescopes optical limit
  35. GRB 060204C: ROTSE-III Optical Limits
  36. GRB 060204C: Swift-BAT detection of a burst
  37. GRB 060124: Radio Observations
  38. GRB060204B: Faulkes OT candidate
  39. GRB 060204B: ART optical limit
  40. GRB 060204A: further INTEGRAL results
  41. GRB060204B - SDSS pre-burst observations
  42. GRB 060203: Swift-BAT refined analysis
  43. GRB 060204B: Swift detection of a burst
  44. GRB 060204: a long GRB detected by INTEGRAL
  45. GRB 060202: UKIRT/WFCAM K-band and KeckI/LRIS I-band Observation
  46. GRB 060203: RTT150 optical observations
  47. GRB060203: Swift XRT Team Refined Analysis
  48. Swift-BAT trigger is GRB 060203
  49. GRB 060203: IR Counterpart
  50. GRB060203: Observations with SARA
  51. GRB 060203: P60 Confirmation of Optical Afterglow
  52. Possible GRB 060203: candidate optical counterpart
  53. Possible GRB 060203: optical observations at Asiago
  54. GRB 060202: PROMPT Observations
  55. GRB 060202: GETS observation
  56. GRB 060202: Gemini-N J, H, K_s observations
  57. GRB 060202 : Kiso B and R band limit
  58. GRB 060202: Near-IR Observation with UKIRT/WFCAM
  59. GRB 060202: Optical Afterglow Candidate from Keck/LRIS
  60. GRB 060202: Refined analysis of the Swift-BAT burst
  61. GRB 060202: Swift/UVOT upper limits
  62. GRB 060202: Swift XRT Team Refined Analysis
  63. GRB 060202 : Lulin R and I band limit
  64. GRB060202: Faulkes North observation
  65. GRB 060202: Swift detection of a burst
  66. GRB 060121: Gemini Late-time Observations
  67. Erratum: SDSS pre-burst observations of GRB fields
  68. GRB 060130: PROMPT Observations
  69. GRB 060130: Swift/XRT observation
  70. GRB 051211A: MDM Observations
  71. GRB 060123: Gemini spectroscopy of the putative host galaxy
  72. GRB 060123: VLA Radio Observations
  73. GRB060130: Optical imaging
  74. GRB060130: REM infrared observations
  75. GRB 060130, SMARTS optical observations
  76. GRB 060130: FRAM optical observations
  77. GRB 060130: further INTEGRAL IBIS results
  78. GRB 060130: a long GRB detected with INTEGRAL
  79. Possible GRB 051221B: MDM Correction
  80. GRB050121: optical observation
  81. GRB050121b: optical observation
  82. GRB 060121: Confirmation of NIR Afterglow
  83. GRB060124: optical observation
  84. GRB060124: optical observations
  85. GRB 060123: Swift refined analysis of an unusual GRB
  86. GRB060124, BVRcIc field calibration
  87. GRB060105: refined analysis of the Suzaku observation
  88. GRB060124 optical observations
  89. GRB 060121: Probable Detection of NIR Afterglow
  90. GRB060124: optical observation
  91. GRB 060116 HST observations
  92. GRB 060124: HETE detection and spectrum of the main peak
  93. Refined XRT Position for GRB 060123
  94. Konus-Wind observation of GRB 060124
  95. GRB060124: detailed XRT analysis
  96. GRB 060124 Optical Observations
  97. GRB 060124: ART optical limits during the burst
  98. GRB060123: Optical and IR Imaging
  99. GRB 060123: P200 Observations
  100. GRB 060124: Keck optical spectrum

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