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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"

18379 results found.

  1. GRB 040924: Afterglow Color
  2. GRB 041006: GETS Optical Afterglow Observation
  3. GRB 041006: Optical Observations
  4. GRB041006, late-time optical photometry
  5. GRB041006: RTT150 Optical Observations
  6. GRB041015 : Multi epoch optical observations
  7. GRB 041016: BOOTES-2 simultaneous observation
  8. GRB041006: RTT150 Optical Observations
  9. GRB041016,optical observation
  10. GRB 041016: Optical limits
  11. GRB 041016:Optical limit during first minute
  12. GRB 041016: Optical limit
  13. GRB 041015 R band observations
  14. GRB040924, BVRcIc field calibration
  15. GRB041015,optical observation
  16. GRB041006: Fading X-ray Afterglow Observed with Chandra
  17. GRB041006: Optical observations and Potential host galaxy
  18. GRB041006, BVRcIc field calibration
  19. GRB 041006: SARA afterglow observations
  20. GRB041006, optical observation in CrAO
  21. Search for SN light in XRF 040912 with MEGACAM
  22. GRB 041006: BR observations with VATT
  23. GRB041006, optical I observation
  24. ROTSE-IIIa Observations of GRB 041006
  25. GRB041006: MASTER optical observations
  26. GRB041006,optical observation
  27. GRB041006: Fading of optical afterglow candidate
  28. GRB 041006: Optical afterglow candidate
  29. radio observations, GRB 040924
  30. GRB040929,optical observation
  31. GRB040924,optical observation
  32. GRB040924,optical observation
  33. GRB040924: KAIT observations
  34. GRB040924: Afterglow magnitude at t=17.5hr
  35. GRB 040924: Subaru NIR observation
  36. GRB 040924: RTT150 optical observations
  37. GRB040912(=H3557): Chandra Candidate X-ray Afterglow
  38. XRF040916: continuing decay of OT
  39. TAROT Observations of GRB 040916 (HETE #3558)
  40. GRB040912(=H3557): Candidate Optical Afterglow
  41. XRF040916, optical observations
  42. XRF 040912, identification of CXO sources
  43. XRF040912, BVRcIc field calibration
  44. XRF040916, BVRcIc field calibration
  45. GRB040912(=H3557): Observations with the Chandra X-ray Observatory
  46. GRB040916: Optical observations
  47. GRB 040912: Optical Observations
  48. GRB/XRF040912,optical observations
  49. GRB 040912, BVRI observations
  50. Optical observations of field of GRB040912
  51. HETE 3557: Optical observations
  52. GRB040827: analysis of the XMM-Newton observation
  53. GRB040903, REM near-IR observation
  54. ROTSE-III Rapid Response to possible GRB 040903 (INTEGRAL #1972)
  55. GRB 040827 - Radio Observations
  56. XMM-Newton Images of GRB 040827
  57. GRB 040827: optical and NIR observations at the VLT
  58. GRB040827 XMM-Newton observation
  59. GRB040825A: optical limit before GRB
  60. GRB 040825B: Optical observations
  61. GRB 040827 : Planned XMM-Newton observation
  62. GRB040825B, BVRcIc field photometry
  63. GRB040825A, BVRcIc field photometry
  64. GCN GRB OBSERBATION REPORT
  65. GRB 040825A,optical observations
  66. GRB040825A: optical observations
  67. GRB040825B: optical observations
  68. GRB 040812: Second epoch CXO Observations
  69. GRB040823,optical observation
  70. XRF040812: GMRT observations
  71. XRF 040812: optical observation at VLT
  72. CXO observation of GRB 040812
  73. GRB040812, optical/IR observations
  74. XRF040701: Optical Observations at ESO
  75. GRB 040730, infrared observations
  76. GRB040624: optical monitoring at TNG
  77. XRF 040701 - optical observations of the decaying Chandra source
  78. XRF040701: Second-Epoch Chandra Observations
  79. XRF040701: First-Epoch Chandra Observations
  80. GRB040624, optical observations
  81. GRB040706:observation at University of Miyazaki
  82. Optical Observations of GRB040624
  83. GRB 040624: optical observations at TNG and VLT
  84. MASTER: GRB 040624 optical observation after 0,48d
  85. GRB 040624, optical observations
  86. IPN Summary of SGR1806-20 Activity in 2004
  87. SGR 1806-20: no IR variability of the proposed counterparts
  88. MASTER:HETE Alert 3259 (SRG1806-20) optical observation
  89. GRB 040606: Optical observations
  90. MASTER: HETE Alert 3274 optical observation
  91. GRB 040511, very fast decay?
  92. GRB 030324: Detection and Color of Host Galaxy
  93. GRB 040511: NIR observations with REM
  94. GRB040511: Candidate optical/NIR afterglow
  95. GRB 040511: ROTSE-III Rapid Optical Upper Limits
  96. GRB 040511: Second Epoch Optical Observations
  97. GRB 040511: Optical observations
  98. GRB 040511: Optical Observations
  99. GRB040511: Optical Observations
  100. GRB040511: Optical Observations

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