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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"

28124 results found.

  1. Photometry of GRB030329 - Constant OT Magnitude
  2. GRB030329 - OT brightens
  3. GRB 030329, optical photometry
  4. GRB 030324: Optical and NIR Observations
  5. GRB030329: R band light curve by MASTER
  6. GRB030329 - Light curve flattening
  7. GRB 030324, optical search
  8. GRB 030329, optical observations
  9. GRB030328: X-ray Fading and Spectrum Measured with Chandra
  10. GRB030329a: detection by Konus-Wind
  11. GRB030329b: detection by Konus-Wind and Helicon-CoronasF
  12. GRB030329, BVRcIc field photometry
  13. GRB030329, SPM optical observations
  14. GRB 030329: Optical decay and synthesis
  15. GRB030329 optical observations
  16. GRB 030329: Optical pre-Imaging
  17. GRB 030329: Upper limit from 5.6 hours before trigger
  18. GRB030328: X-ray Afterglow Observed with Chandra
  19. GRB 030329, R-band observations
  20. GRB 030329: OT B and R photometry, decline rate
  21. GRB030329: Upper limits from recent and historical observations.
  22. GRB030329 (=H2652): A Long, Extremely Bright GRB Localized by the HETE WXM and SXC
  23. GRB 030329: Optical Afterglow Observations
  24. GRB 030328: optical observations
  25. GRB 030329: Optical afterglow fading
  26. GRB 030328: OT photometry
  27. GRB030328: optical spectroscopy at TNG
  28. GRB030328: optical photometry at the TNG
  29. VLT spectra of GRB 030328
  30. GRB030328 (=H2650): A Long, Bright GRB Localized by the HETE WXM and SXC
  31. GRB 030328: Optical observations
  32. GRB030324 optical observation
  33. GRB030131, BVRcIc field photometry
  34. Possible GRB030323 localized by INTEGRAL
  35. GRB030323: Detection on 2003/03/24
  36. IPN triangulation of GRB030326 (single small error box)
  37. IPN triangulation of GRB030325 (two small error boxes)
  38. GRB030323: V, R, I photometry
  39. GRB030323 (=H2640): A Faint, Long GRB Localized by the HETE WXM and SXC
  40. GRB030324 (=H2641): A Long GRB Localized in Real Time by the HETE WXM
  41. VLT/FORS2 spectra of GRB 030323
  42. GRB030323, optical observations
  43. GRB030324, BVRcIc field photometry
  44. GRB030323, BVRcIc field calibration
  45. IPN triangulation of GRB030320 (small error box)
  46. Possible GRB 030320 localized by INTEGRAL
  47. IPN triangulation of GRB030306 (single small error box - REVISED)
  48. IPN triangulation of GRB030306 (single small error box)
  49. IPN triangulation of GRB030306 (two small error boxes)
  50. GRB030226, BVRc observations
  51. Chandra detection of the X-ray afterglow of GRB 030226
  52. GRB030227: Kiso optical upper limit
  53. GRB030227, BVRcIc field photometry
  54. GRB030226, BVRcIc field calibration
  55. GRB 030228, optical observations
  56. GRB 030227: Confirmed Optical Afterglow (S1-A)
  57. GRB 030227: fading of candidate optical afterglow 'S1-A'
  58. GRB030227:Optical observations
  59. GRB 030227, possible optical counterpart of XMM-Newton source
  60. GRB030227 - faint tentative OT candidate
  61. GRB 030226, optical observations
  62. XMM-Newton observation of GRB030227
  63. GRB030227: Kiso optical observations
  64. GRB 030227: Kyoto optical observation
  65. GRB 030226, optical light curve
  66. GRB030227 localized by INTEGRAL
  67. GRB 030226 : Predicted light curve
  68. GRB030226: ESI spectroscopy
  69. GRB030226 (=U10893): A Long GRB Localized by the HETE WXM and SXC
  70. GRB 030226 simultaneous optical observations
  71. GRB 030226, optical observations
  72. GRB030226: Optical decay index
  73. GRB 030226 Optical Spectra and R,I,z' Imaging
  74. GRB: Non-Referencing of GCN Circulars.
  75. IPN triangulation of GRB030217 (small error box)
  76. GRB 030131: marginal optical detection
  77. GRB 030204: Optical Observations
  78. GRB030204 field photometry
  79. GRB020819: Kiso R and I band observations
  80. GRB030131: Candidate Optical Afterglow
  81. IPN triangulation of GRB030204 (small error box)
  82. GRB 030131, optical observations
  83. GRB 030131: afterglow candidate
  84. GRB 030115, late-time optical observations
  85. GRB030131: corrected INTEGRAL position
  86. GRB 020819: Host galaxy at Radio Position
  87. IPN triangulation of GRB030131
  88. GRB 030131 optical observations
  89. GRB 030131 optical observations
  90. A long GRB detected by INTEGRAL
  91. GRB030115: 1.2 mm upper limits with MAMBO @ IRAM 30m
  92. GRB 030115, simultaneous observations by BOOTES-1
  93. GRB 030115: IR observations with IRSF/SIRIUS
  94. IPN triangulation of GRB030115C (large error box)
  95. GRB030115, afterglow candidate
  96. GRB 021211: R-band observations at late-time
  97. GRB030115: Optical Observations, Swiss Telescope at La Silla (ESO, Chile)
  98. GRB 030115 : Possible IR counterpart
  99. GRB030115 (=H2533): A Long GRB Localized by the HETE WXM and SXC
  100. Distribution of INTEGRAL SPI-ACS triggers for GRB bursts

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