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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"

36195 results found.

  1. VLT spectra of GRB 030328
  2. GRB 030328, optical spectroscopy
  3. GRB 030328, optical observations
  4. GRB030328 (=H2650): A Long, Bright GRB Localized by the HETE WXM and SXC
  5. GRB 030328: Optical observations
  6. Re: GRB 030328: Finding chart
  7. GRB 030328: Finding chart
  8. GRB 030328: Optical afterglow candidate
  9. GRB030131, BVRcIc field photometry
  10. Possible GRB030323 localized by INTEGRAL
  11. IPN triangulation of GRB030325 (final analysis)
  12. IPN triangulation of GRB030326 (single small error box)
  13. GRB 030323: SARA Optical Observations
  14. IPN triangulation of GRB030325 (single small error box)
  15. GRB030324, optical observations
  16. IPN triangulation of GRB030325 (two small error boxes)
  17. GRB 030324: TAROT optical observations
  18. GRB 030324 (HETE #2641): Optical observations
  19. GRB030324, Optical Observations
  20. GRB030323: Upper limits from recent and historical observations.
  21. GRB030323 (=H2640): A Faint, Long GRB Localized by the HETE WXM and SXC
  22. GRB030324 (=H2641): A Long GRB Localized in Real Time by the HETE WXM
  23. GRB030324 (=H2641): A Long GRB Localized in Real Time by the HETE WXM
  24. VLT/FORS2 spectra of GRB 030323
  25. GRB030323, ROTSE-III detection of possible optical counterpart
  26. GRB030323, optical observations
  27. GRB030324, BVRcIc field photometry
  28. GRB030323, possible optical counterpart
  29. GRB030323, BVRcIc field calibration
  30. GRB 030324 optical observations
  31. GRB 030320: Optical Observations
  32. GRB 030324, optical observations
  33. IPN triangulation of GRB030320B (annulus)
  34. IPN triangulation of GRB030320 (small error box)
  35. IPN triangulation of GRB030320
  36. Possible GRB 030320 localized by INTEGRAL
  37. IPN upper limit to a GRB associated with SN2003L
  38. IPN triangulation of GRB030317 (annulus)
  39. IPN triangulation of GRB030307 (annulus)
  40. GRB 030227: Optical limit at RIKEN
  41. GRB 030226 Optical observations
  42. IPN triangulation of GRB030306 (single small error box - REVISED)
  43. GRB030226: Optical observations at Asiago
  44. IPN triangulation of GRB030306 (single small error box)
  45. IPN triangulation of GRB030306 (two small error boxes)
  46. IPN triangulation of GRB030306 (intense; annulus only so far)
  47. GRB 030226: Optical observations
  48. IPN triangulation of GRB030304 (annulus)
  49. GRB 030227: Optical observations
  50. GRB030226, BVRc observations
  51. Chandra detection of the X-ray afterglow of GRB 030226
  52. GRB 030226, further optical/NIR imaging
  53. GRB030227, optical observations
  54. GRB 030226: Ic Observations
  55. GRB030227: Kiso optical upper limit
  56. IPN triangulation of GRB030301 (annulus)
  57. IPN triangulation of GRB030228 (annulus)
  58. GRB030227, BVRcIc field photometry
  59. GRB030226, BVRcIc field calibration
  60. GRB 030227 optical afterglow
  61. 030302: NOT A GRB
  62. 030228: NOT A GRB
  63. GRB 030228, optical observations
  64. GRB 030226: Steep Decline
  65. GRB 030227: Confirmed Optical Afterglow (S1-A)
  66. GRB 030226: R band polarimetric observations
  67. GRB 030226: Optical observations
  68. GRB 030227: fading of candidate optical afterglow 'S1-A'
  69. GRB030227:Optical observations
  70. GRB 20030226: Upper limits from recent and historical observations
  71. GRB 030227, possible optical counterpart of XMM-Newton source
  72. GRB030227 - faint tentative OT candidate
  73. GRB 030226, optical observations
  74. GRB030227: Kiso optical observations
  75. GRB 030227: Kyoto optical observation
  76. GRB 030226, optical light curve
  77. GRB 030226 spectroscopy
  78. Possible break in the GRB 030226 light curve
  79. GRB 030226 : Predicted light curve
  80. IPN triangulation of GRB030225 (annulus)
  81. GRB 030226: Confirmed decay index
  82. GRB030226: ESI spectroscopy
  83. GRB030226 (=U10893): A Long GRB Localized by the HETE WXM and SXC
  84. GRB 030226 simultaneous optical observations
  85. Two absorption systems in GRB 030226
  86. GRB 030226, optical observations
  87. GRB 030226 Optical Spectra and R,I,z' Imaging
  88. GRB 030226, optical observations
  89. GRB 030226: Optical afterglow
  90. GRB 030217: Optical Observations at 4, 5, and 6 Days
  91. IPN triangulation of GRB030223 (annulus)
  92. IPN triangulation of GRB030220 (annulus)
  93. GRB: Non-Referencing of GCN Circulars.
  94. IPN triangulation of GRB030218 (annulus)
  95. IPN triangulation of GRB030217 (small error box)
  96. IPN triangulation of GRB030215C (annulus)
  97. IPN triangulation of GRB030217 (annulus)
  98. IPN triangulation of GRB030216 (annulus)
  99. IPN triangulation of GRB030215A and GRB030215B (annuli)
  100. GRB030115, WSRT radio observations - correction to GCN 1864

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