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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"

36007 results found.

  1. GRB040929,optical observation
  2. GRB040924,optical observation
  3. GRB040924, RTT150 optical observation
  4. GRB 040924: detection of possible host galaxy by Subaru
  5. GRB040924, RTT150 optical observation
  6. GRB040924: KAIT observations
  7. GRB040924: Afterglow magnitude at t=17.5hr
  8. GRB 040924: WSRT Radio Observations
  9. GRB 040924: NIR finding chart
  10. GRB040924 : Optical candidate observations at Lulin observatory
  11. GRB040924 : Optical candidate observations at Lulin observatory
  12. GRB 040924: Subaru NIR observation
  13. GRB 040924: RTT150 optical observations
  14. GRB 040924, optical follow-up
  15. IPN triangulation of GRB040924 (H3564)
  16. GRB 040924(=H3564): A Short, Bright GRB Localized in Real Time by HETE
  17. GRB040912(=H3557): Chandra Candidate X-ray Afterglow
  18. XRF040916: continuing decay of OT
  19. TAROT Observations of GRB 040916 (HETE #3558)
  20. XRF040916, optical observations
  21. XRF040916: Optical Transient Candidate by Subaru
  22. GRB040916 optical limits 17 min after GRB
  23. XRF 040912 (=H3557): Spectral and Temporal Properties
  24. XRF040916, Ic observations
  25. XRF040912, BVRcIc field calibration
  26. XRF040916, BVRcIc field calibration
  27. GRB040916: Archival optical observations
  28. GRB040912(=H3557): Observations with the Chandra X-ray Observatory
  29. GRB040916: Optical observations
  30. ROTSE-IIIb Observations of GRB 040916 (HETE #3558)
  31. GRB040912 (= H3557): Chandra Observations Scheduled
  32. GRB 040912: Optical Observations
  33. GRB/XRF040912,optical observations
  34. GRB 040912, BVRI observations
  35. Optical observations of GRB/XRF 040912 = HETE 3557
  36. An intense burst from SGR1806-20
  37. IBAS GRB Alerts 1978-1980
  38. Optical observations of field of GRB040912
  39. GRB040912 (= H3557): A Long GRB or XRF Localized by HETE
  40. GRB 040827: XMM-Newton data
  41. GRB040903 - A XRF?
  42. GRB040827: analysis of the XMM-Newton observation
  43. GRB 040903 - INTEGRAL data analysis
  44. IBAS Alert 1974. Not a real GRB
  45. Very bright burst detected from SGR 1806-20
  46. ROTSE-III Rapid Response to possible GRB 040903 (INTEGRAL #1972)
  47. Possible GRB 040903 - further analysis
  48. Possible GRB 040903 detected with INTEGRAL
  49. GRB 040827 - Radio Observations
  50. XMM-Newton Images of GRB 040827
  51. GRB 040827: optical and NIR observations at the VLT
  52. GRB 040827: UKIRT - 2nd epoch K-band imaging
  53. GRB 040827: 2nd epoch of Magellan K-band imaging
  54. GRB 040827: K imaging - no evidence of variability
  55. GRB 040827: Detection of NIR afterglow
  56. GRB 040827: Possible detection of optical afterglow
  57. GRB 040827: RTT150 optical observations
  58. GRB040825A: optical limit before GRB
  59. GRB 040825B: Optical observations
  60. GRB040827 optical observations
  61. GRB 040827 : Planned XMM-Newton observation
  62. GRB 040827 - Refined position
  63. GRB 040827 : peak flux
  64. GRB 040827 - A long GRB detected by INTEGRAL
  65. GRB040825B, BVRcIc field photometry
  66. GRB040825A, BVRcIc field photometry
  67. GCN GRB OBSERBATION REPORT
  68. GRB 040825A,optical observations
  69. Increase of SGR 1806-20 activity
  70. GRB 040825A: Optical observations.
  71. GRB040825B: Correction to GCN 2657
  72. GRB 040825: Optical observations
  73. GRB 040812: Second epoch CXO Observations
  74. GRB040823,optical observation
  75. Triangulation of GRB 040816 (Konus-Wind - Helicon-Coronas-F)
  76. XRF 040812: optical observation at VLT
  77. GRB 040812: Optical counterparts of CXO sources
  78. XRF040812: possible afterglow
  79. CXO observation of GRB 040812
  80. IPN/HETE localizations of GRB040810 (=H3489)
  81. GRB 040812: Keck and LCO optical observations
  82. GRB 040812: Keck and LCO observations
  83. GRB 040812: radio observations
  84. GRB040812, optical/IR observations
  85. Konus-Wind observation of GRB040810 (=H3489)
  86. GRB 040812: a long GRB detected by INTEGRAL
  87. GRB 040810: Optical observations of a limited region
  88. IPN/HETE triangulation of GRB040802 (=H3485)
  89. GRB 040730, infrared observations
  90. GRB 040730: Optical observations
  91. GRB 040730: a long GRB detected with INTEGRAL
  92. Ongoing activity of SGR 1806-20
  93. GRB040624: optical monitoring at TNG
  94. Cancellation of IBAS/INTEGRAL GRB alerts
  95. IBAS Alert 1836: NOT a real GRB
  96. GRB040709 J,H-band observations
  97. GRB 040624: optical observations
  98. GRB 040624: optical observations at TNG and VLT
  99. MASTER: GRB 040624 optical observation after 0,48d
  100. GRB 040624: R-band observations

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