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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"

19251 results found.

  1. GRB030429: Optical Observations
  2. GRB 030429: confirmation of afterglow candidate
  3. SNeIa AS THE POSSIBLE PROGENITORS OF SHORT-DURATION GRBs.
  4. IPN triangulation of GRB030425 (single error box)
  5. GRB030329, SPM optical observations (Correction)
  6. GRB030329, SPM optical observations
  7. GRB 030329, the review of the sky area in plate archive (1950-1998)
  8. GRB 030329: optical spectropolarimetry at VLT
  9. GRB 030329: wide-field photograph by R. Tamura 1 hr after the burst
  10. IPN triangulation of GRB030422 (two large error boxes)
  11. GRB030329, optical observation
  12. GRB030418: Upper limits from recent and historical observations.
  13. GRB 030418: Optical afterglow
  14. GRB 030418: Optical afterglow candidate
  15. OT GRB 030329: early UBVRcIc spectral evolution
  16. OT GRB 030329: early spectrum
  17. IPN triangulation of GRB030414 (small error box)
  18. IPN triangulation of GRB030413 (small error box)
  19. Superluminal motion in GRB 030329 (Correction)
  20. Superluminal motion in GRB 030329
  21. IPN triangulation of GRB030406 (small error box)
  22. IPN triangulation of GRB050403 (small error box)
  23. GRB 030329: BVRI photometry at Asiago
  24. GRB 030329: VLT V-band photometry
  25. Kiso observation of the GRB030329 at April 6
  26. GRB 030329, color evolution
  27. GRB 030329, color evolution
  28. GRB030329: Kiso B and R band observations
  29. GRB030329: More AAVSO VR obs
  30. GRB030328: R upper limit after 6 hours by MASTER
  31. GRB030329, optical observation
  32. GRB 030329, light curve and SN prediction
  33. GRB 030329, BRI photometry
  34. GRB030328: Full Observation, X-ray Fading and Spectrum Measured
  35. GRB 030329 , SPM optical observations
  36. Further AAVSO V,B,R observations of GRB030329
  37. GRB 030329: Additional Mt. Laguna Optical Observations
  38. GRB030329: Optical observations
  39. GRB030329: further optical photometry and evidence for a light curve discontinuity
  40. triangulation of GRB 030331 (single error box)
  41. GRB 030329: optical observations
  42. GRB 030329, optical spectroscopy
  43. Photometry of GRB030329 - Constant OT Magnitude
  44. GRB030329 - OT brightens
  45. GRB030329 15 GHz radio observation
  46. GRB 030329, optical photometry
  47. GRB 030324: Optical and NIR Observations
  48. GRB030329 - Light curve flattening
  49. GRB030328: X-ray Fading and Spectrum Measured with Chandra
  50. GRB030329a: detection by Konus-Wind
  51. GRB030329b: detection by Konus-Wind and Helicon-CoronasF
  52. GRB 030329: Optical decay and synthesis
  53. GRB030328: X-ray Afterglow Observed with Chandra
  54. GRB 030329: OT B and R photometry, decline rate
  55. GRB030329 (=H2652): A Long, Extremely Bright GRB Localized by the HETE WXM and SXC
  56. GRB030328: optical spectroscopy at TNG
  57. GRB030328: optical photometry at the TNG
  58. VLT spectra of GRB 030328
  59. GRB030328 (=H2650): A Long, Bright GRB Localized by the HETE WXM and SXC
  60. Possible GRB030323 localized by INTEGRAL
  61. IPN triangulation of GRB030326 (single small error box)
  62. IPN triangulation of GRB030325 (two small error boxes)
  63. GRB030323: V, R, I photometry
  64. GRB030324, Optical Observations
  65. GRB030323 (=H2640): A Faint, Long GRB Localized by the HETE WXM and SXC
  66. GRB030324 (=H2641): A Long GRB Localized in Real Time by the HETE WXM
  67. VLT/FORS2 spectra of GRB 030323
  68. IPN triangulation of GRB030320 (small error box)
  69. IPN upper limit to a GRB associated with SN2003L
  70. IPN triangulation of GRB030306 (single small error box - REVISED)
  71. IPN triangulation of GRB030306 (single small error box)
  72. IPN triangulation of GRB030306 (two small error boxes)
  73. IPN triangulation of GRB030304 (annulus)
  74. GRB030226, BVRc observations
  75. GRB 030228, optical observations
  76. GRB 030227: Confirmed Optical Afterglow (S1-A)
  77. GRB 030227, possible optical counterpart of XMM-Newton source
  78. GRB030227 - faint tentative OT candidate
  79. GRB 030226, optical observations
  80. XMM-Newton observation of GRB030227
  81. GRB 030226, optical light curve
  82. GRB 030226 : Predicted light curve
  83. GRB030226 (=U10893): A Long GRB Localized by the HETE WXM and SXC
  84. GRB 030226 simultaneous optical observations
  85. GRB 030226, optical observations
  86. GRB 030226 Optical Spectra and R,I,z' Imaging
  87. GRB: Non-Referencing of GCN Circulars.
  88. IPN triangulation of GRB030217 (small error box)
  89. GRB 030204: Optical Observations
  90. GRB030131: Candidate Optical Afterglow
  91. GRB 030204, optical observations
  92. IPN triangulation of GRB030204 (small error box)
  93. GRB 030131, optical observations
  94. GRB 030131: afterglow candidate
  95. GRB030131: corrected INTEGRAL position
  96. IPN triangulation of GRB030131
  97. GRB030131: refined position
  98. GRB030115: 1.2 mm upper limits with MAMBO @ IRAM 30m
  99. GRB 030115, simultaneous observations by BOOTES-1
  100. IPN triangulation of GRB030115C (large error box)

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