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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"

28229 results found.

  1. GRB030725 (=H2779): A Bright GRB Localized by HETE
  2. XRF030723 (= H2777): Chandra Observations Scheduled
  3. XRF030723, BVRcIc field photometry correction
  4. XRF030723, ROTSE-III Early Observations
  5. XRF030723, BVRcIc field photometry
  6. XRF 030723, optical observations
  7. XRF030723 (=H2777): An X-ray Flash Localized by the HETE WXM and
  8. Konus-Wind detection of the bursts from SGR1806-20 region
  9. SGR 1806-20, submm observations
  10. RXTE PCA Observations of SGR1806-20 Region
  11. IPN triangulation of GRB030714 (two large error boxes)
  12. IPN triangulation of GRB030715 (two large error boxes)
  13. GRB030706 triangulation (single large error box)
  14. GRB030329, optical observation in May
  15. IPN triangulation of GRB030626 (single large error box)
  16. IPN triangulation of GRB030626 (two large error boxes)
  17. GRB030329: second XMM-Newton observation
  18. GRB030329 -- RATAN-600 data in April-May
  19. GRB030528(=H2724): X-ray Afterglow Identified in Second Epoch
  20. IPN triangulation of GRB030606 (two alternate error boxes)
  21. GRB 030528: Infrared Observations and the Proposed IR Counterpart
  22. GRB 030528: tentative NIR counterpart
  23. GRB030528(=H2724): Observations with the Chandra X-ray Observatory
  24. GRB030528, BVRI field photometry
  25. GRB030329, SPM optical observations
  26. GRB030528: Chandra TOO Planned
  27. GRB030528(=H2724): Revised SXC Localization
  28. GRB 030528 Bisei optical observation
  29. GRB030528 (H2724): A long GRB localized by HETE
  30. GRB 030329: Correction to GCN 2254
  31. GRB 030329: Optical Observations
  32. GRB 030528 (=H2724) Kyoto optical observation
  33. GRB 030416: Optical Observations
  34. GRB 030329 Optical Observations
  35. GRB030329: XMM-Newton observation
  36. GRB 021004: HST observations
  37. GRB030324: Further Observations of the Candidate Optical Afterglow
  38. GRB030519B (=H2716): Peak Fluxes, Fluences, and Energy Spectrum
  39. IPN triangulation of GRB030519B=H2716 (small error box)
  40. HETE GRB030329, correction to Rc Observations in Loiano
  41. GRB 030329: Optical limit (contemporaneous imaging)
  42. IPN triangulation of GRB030509 (small errror box)
  43. GRB030329, BVRI photometry
  44. GRB030429, refiend optical brightness
  45. GRB 030329: Optical limit (contemporaneous photography)
  46. GRB030418, BVRcIc field photometry
  47. GRB030429, BVRcIc field photometry
  48. GRB030429 (=H2695): A Long GRB Localized by the HETE WXM and SXC
  49. XRF030416 (=U10897): An X-Ray Flash Localized by the HETE WXM
  50. GRB030329: RTT150 optical observations and upper limit for a host
  51. GRB030501, optical observation
  52. GRB030501 triangulation (correction to GCN 2194)
  53. GRB030329: RTT150 optical observations and upper limit for a host
  54. GRB 030429: redshift from VLT spectroscopy
  55. GRB030501B triangulation (single error box)
  56. GRB 030329, BVRI photometry
  57. GRB030429: Optical Observations
  58. GRB030501: TAROT candidate afterglow present in archival images
  59. GRB 030429: confirmation of afterglow candidate
  60. GRB 030329 Oprical observations in Rozhen observatory
  61. SNeIa AS THE POSSIBLE PROGENITORS OF SHORT-DURATION GRBs.
  62. IPN triangulation of GRB030425 (single error box)
  63. GRB 030329, the review of the sky area in plate archive (1950-1998)
  64. GRB 030329: optical spectropolarimetry at VLT
  65. GRB 030329: wide-field photograph by R. Tamura 1 hr after the burst
  66. GRB030329: optical polarization
  67. IPN triangulation of GRB030422 (two large error boxes)
  68. GRB030329, optical observation
  69. MASTER:optical observations GRB030418
  70. MASTER:optical observations probable GRB030414
  71. GRB030418: Kiso near infrared observations
  72. GRB 030418: Optical afterglow
  73. OT GRB 030329: early UBVRcIc spectral evolution
  74. OT GRB 030329: early spectrum
  75. IPN triangulation of GRB030414 (small error box)
  76. IPN triangulation of GRB030413 (small error box)
  77. Superluminal motion in GRB 030329 (Correction)
  78. Superluminal motion in GRB 030329
  79. GRB030329, optical position
  80. IPN triangulation of GRB030406 (small error box)
  81. IPN triangulation of GRB050403 (small error box)
  82. GRB 030329: BVRI photometry at Asiago
  83. GRB 030329: VLT V-band photometry
  84. Kiso observation of the GRB030329 at April 6
  85. GRB 030329, color evolution
  86. GRB030328, UBVRcIc field photometry
  87. GRB 030329 Optical observations
  88. GRB030329: Kiso B and R band observations
  89. GRB030328: R upper limit after 6 hours by MASTER
  90. SDSS 0.5m PT observations of GRB030329 (correction)
  91. SDSS 0.5m PT observations of GRB030329
  92. GRB030329: final R-band light curve by MASTER
  93. GRB030329, optical observation
  94. GRB030329, new UBVRcIc field photometry
  95. GRB 030329, light curve and SN prediction
  96. GRB 030329, BRI photometry
  97. GRB030328: Full Observation, X-ray Fading and Spectrum Measured
  98. GRB030329: Optical observations at Teramo
  99. GRB 030329: Radio observations at GMRT
  100. Further AAVSO V,B,R observations of GRB030329

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