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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"

28230 results found.

  1. Further AAVSO V,B,R observations of GRB030329
  2. GRB 030329: Additional Mt. Laguna Optical Observations
  3. GRB 030329: Observations with ANDICAM
  4. GRB030329: further optical photometry and evidence for a light curve discontinuity
  5. triangulation of GRB 030331 (single error box)
  6. GRB 030329: optical observations
  7. Photometry of GRB030329 - Constant OT Magnitude
  8. GRB030329 - OT brightens
  9. GRB 030329, optical photometry
  10. GRB 030324: Optical and NIR Observations
  11. GRB030329: R band light curve by MASTER
  12. GRB030329 - Light curve flattening
  13. GRB 030324, optical search
  14. GRB 030329, optical observations
  15. GRB030328: X-ray Fading and Spectrum Measured with Chandra
  16. GRB030329a: detection by Konus-Wind
  17. GRB030329b: detection by Konus-Wind and Helicon-CoronasF
  18. GRB030329, BVRcIc field photometry
  19. GRB030329, SPM optical observations
  20. GRB 030329: Optical decay and synthesis
  21. GRB030329 optical observations
  22. GRB 030329: Optical pre-Imaging
  23. GRB 030329: Upper limit from 5.6 hours before trigger
  24. GRB030328: X-ray Afterglow Observed with Chandra
  25. GRB 030329, R-band observations
  26. GRB 030329: OT B and R photometry, decline rate
  27. GRB030329: Upper limits from recent and historical observations.
  28. GRB030329 (=H2652): A Long, Extremely Bright GRB Localized by the HETE WXM and SXC
  29. GRB 030329: Optical Afterglow Observations
  30. GRB 030328: optical observations
  31. GRB 030329: Optical afterglow fading
  32. GRB 030328: OT photometry
  33. GRB030328: optical spectroscopy at TNG
  34. GRB030328: optical photometry at the TNG
  35. VLT spectra of GRB 030328
  36. GRB030328 (=H2650): A Long, Bright GRB Localized by the HETE WXM and SXC
  37. GRB 030328: Optical observations
  38. GRB030324 optical observation
  39. GRB030131, BVRcIc field photometry
  40. Possible GRB030323 localized by INTEGRAL
  41. GRB030323: Detection on 2003/03/24
  42. IPN triangulation of GRB030326 (single small error box)
  43. IPN triangulation of GRB030325 (two small error boxes)
  44. GRB030323: V, R, I photometry
  45. GRB030323 (=H2640): A Faint, Long GRB Localized by the HETE WXM and SXC
  46. GRB030324 (=H2641): A Long GRB Localized in Real Time by the HETE WXM
  47. VLT/FORS2 spectra of GRB 030323
  48. GRB030323, optical observations
  49. GRB030324, BVRcIc field photometry
  50. GRB030323, BVRcIc field calibration
  51. IPN triangulation of GRB030320 (small error box)
  52. Possible GRB 030320 localized by INTEGRAL
  53. IPN triangulation of GRB030306 (single small error box - REVISED)
  54. IPN triangulation of GRB030306 (single small error box)
  55. IPN triangulation of GRB030306 (two small error boxes)
  56. GRB030226, BVRc observations
  57. Chandra detection of the X-ray afterglow of GRB 030226
  58. GRB030227: Kiso optical upper limit
  59. GRB030227, BVRcIc field photometry
  60. GRB030226, BVRcIc field calibration
  61. GRB 030228, optical observations
  62. GRB 030227: Confirmed Optical Afterglow (S1-A)
  63. GRB 030227: fading of candidate optical afterglow 'S1-A'
  64. GRB030227:Optical observations
  65. GRB 030227, possible optical counterpart of XMM-Newton source
  66. GRB030227 - faint tentative OT candidate
  67. GRB 030226, optical observations
  68. XMM-Newton observation of GRB030227
  69. GRB030227: Kiso optical observations
  70. GRB 030227: Kyoto optical observation
  71. GRB 030226, optical light curve
  72. GRB030227 localized by INTEGRAL
  73. GRB 030226 : Predicted light curve
  74. GRB030226: ESI spectroscopy
  75. GRB030226 (=U10893): A Long GRB Localized by the HETE WXM and SXC
  76. GRB 030226 simultaneous optical observations
  77. GRB 030226, optical observations
  78. GRB030226: Optical decay index
  79. GRB 030226 Optical Spectra and R,I,z' Imaging
  80. GRB: Non-Referencing of GCN Circulars.
  81. IPN triangulation of GRB030217 (small error box)
  82. GRB 030131: marginal optical detection
  83. GRB 030204: Optical Observations
  84. GRB030204 field photometry
  85. GRB020819: Kiso R and I band observations
  86. GRB030131: Candidate Optical Afterglow
  87. IPN triangulation of GRB030204 (small error box)
  88. GRB 030131, optical observations
  89. GRB 030131: afterglow candidate
  90. GRB 030115, late-time optical observations
  91. GRB030131: corrected INTEGRAL position
  92. GRB 020819: Host galaxy at Radio Position
  93. IPN triangulation of GRB030131
  94. GRB 030131 optical observations
  95. GRB 030131 optical observations
  96. A long GRB detected by INTEGRAL
  97. GRB030115: 1.2 mm upper limits with MAMBO @ IRAM 30m
  98. GRB 030115, simultaneous observations by BOOTES-1
  99. GRB 030115: IR observations with IRSF/SIRIUS
  100. IPN triangulation of GRB030115C (large error box)

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