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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"

37171 results found.

  1. IPN triangulation of GRB030523 (annulus)
  2. GRB 030329: optical photometry at various french observatories
  3. GRB 030329: optical photometry at Belesta observatory (France)
  4. GRB 030329/SN 2003dh: Possible increase in brightness
  5. GRB 030329: HST ACS Observations of the Host
  6. GRB 030329 Optical Observations
  7. GRB 021004: HST observations
  8. GRB030324: Further Observations of the Candidate Optical Afterglow
  9. IPN triangulation of GRB030519B=H2716 (small error box)
  10. GRB 030418: Second Epoch Optical Observations with Magellan
  11. GRB030519B (=H2716): A Long, Bright GRB Localized by the HETE WXM
  12. IPN triangulation of GRB030519 (annulus)
  13. IPN triangulation of GRB030518C (annulus)
  14. IPN triangulation of GRB030518B (annulus)
  15. IPN triangulation of GRB030518A (annulus)
  16. IPN triangulation of GRB030514 (annulus)
  17. IPN triangulation of GRB030513 (annulus)
  18. IPN triangulation of GRB030509B (annulus)
  19. GRB 030329: Optical limit (contemporaneous imaging)
  20. GRB 030501: final TAROT limits
  21. IPN triangulation of GRB030509 (small errror box)
  22. IPN triangulation of GRB030509 - correction
  23. IPN triangulation of GRB030509 (single error box)
  24. GRB030329: RTT150 optical observations
  25. GRB 030329: Optical limit (contemporaneous photography)
  26. GRB030418, BVRcIc field photometry
  27. GRB 030429: Redshift of neighbor galaxy
  28. GRB030429, BVRcIc field photometry
  29. GRB 030329: High-Resolution Spectroscopy of the Host
  30. GRB030429 (=H2695): A Long GRB Localized by the HETE WXM and SXC
  31. GRB030418 (=H2686): A Long, X-Ray-Rich GRB Localized by the HETE WXM
  32. GRB030429: RTT150 optical observations, a possible host galaxy
  33. IPN triangulation of GRB030506 (annulus)
  34. IPN triangulation of GRB030505B (large error box)
  35. IPN triangulation of GRB030505A (annulus)
  36. GRB030329: RTT150 optical observations and upper limit for a host
  37. GRB 030329: all-sky CCD images by K. Shiokawa immediately after the burst
  38. GRB030501, optical observation
  39. GRB030501C triangulation (annulus)
  40. GRB030329: RTT150 optical observations and upper limit for a host
  41. GRB 030429: Radio Observations
  42. GRB 030429: redshift from VLT spectroscopy
  43. GRB 030429: IR photometry with IRSF/SIRIUS
  44. GRB030501B triangulation (single error box)
  45. GRB 030329 Optical Observations
  46. GRB 030329, BVRI photometry
  47. GRB 030501: TAROT possible candidate counterpart
  48. IPN triangulation of GRB030501 (IBIS event; annulus)
  49. IPN triangulation of GRB030501B (annulus)
  50. GRB 030429: confirmation of afterglow candidate
  51. GRB030429, possible optical counterpart
  52. GRB030501 localized by INTEGRAL
  53. GRB030425: CrAO optical observation
  54. IPN triangulation of GRB030429 (annulus)
  55. IPN triangulation of GRB030428 (two large error boxes)
  56. GRB 030329 Oprical observations in Rozhen observatory
  57. GRB 030429: ROTSE-III observations
  58. GRB 030324: Radio Observations
  59. GRB030329 observed as a sudden ionospheric disturbance (SID)
  60. IPN triangulation of GRB030426 (annulus)
  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: Spectral Evolution of SN 2003dh
  65. Optical Observations of GRB 030418 with Magellan
  66. GRB 030329: optical spectropolarimetry at VLT
  67. IPN triangulation of GRB030422C (annulus)
  68. IPN triangulation of GRB030422B (annulus)
  69. GRB 030329: wide-field photograph by R. Tamura 1 hr after the burst
  70. GRB030329: optical polarization
  71. IPN triangulation of GRB030422 (two large error boxes)
  72. GRB 030329 3.5 and 6 cm radio observations at RTF-32 telescope
  73. IPN triangulation of GRB030421 (annulus)
  74. MASTER:optical observations GRB030418
  75. MASTER:optical observations probable GRB030414
  76. GRB030329: 444 AAVSO Measurements
  77. IPN triangulation of GRB030419 (annulus)
  78. MASTER:optical observations GRB030416
  79. ROTSE-III prompt optical detections of GRB 030418
  80. GRB030418: Upper limits from recent and historical observations.
  81. GRB030418: Kiso near infrared observations
  82. GRB 030418: Optical afterglow
  83. GRB 030418: Finder for afterglow candidate
  84. GRB 030418: Optical afterglow candidate
  85. GRB 030329 OT position
  86. OT GRB 030329: early UBVRcIc spectral evolution
  87. GRB030329, UBVRI polarimetry, R-polarization
  88. GRB 030329: SARA Optical Observations
  89. OT GRB 030329: early spectrum
  90. GRB030329: VR Photometry at TNG
  91. GRB030324: Candidate Optical Afterglow (Erratum)
  92. GRB030324: Candidate Optical Afterglow
  93. IPN triangulation of GRB030414 (small error box)
  94. GRB 030413: Optical Observations
  95. GRB 030329 Rc observations
  96. IPN triangulation of GRB030413 (small error box)
  97. IPN triangulation of GRB030410 (annulus)
  98. Superluminal motion in GRB 030329 (Correction)
  99. Superluminal motion in GRB 030329
  100. GRB 030329 and SN 2003dh

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