ASTROSAT CZTI

Data Quality Report

Orbit 26121

Creation date: 2024-06-27T19:25:03.925770
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A09_138T04_9000003776_26121cztM0_level2.evt modeM0/AS1A09_138T04_9000003776_26121cztM0_level2_quad_clean.evt
Size (bytes)838,941,120148,838,400
Size800.1 MB 141.9 MB
Events in quadrant A5,328,084968,657
Events in quadrant B5,055,988993,158
Events in quadrant C5,219,921930,110
Events in quadrant D9,101,594896,809

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0224020
B0215340
C0218610
D0341760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10381850.818804%
B10382810.780196%
C103811541.483479%
D103815935.712359%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 11921 10381 1 1 0.01% 0.01%
B 11922 10382 0 0 0.00% 0.00%
C 11921 10381 14 14 0.12% 0.13%
D 11921 10381 495 495 4.15% 4.77%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 0 13 434931 1705.49 1267 1242 254.3
A 13 254 16019 58.11 1267 1242 254.3
A 3 137 12033 42.44 1267 1242 254.3
B 0 190 76800 313.94 1262 1229 240.7
B 12 111 29775 118.59 1262 1229 240.7
B 11 111 26974 106.95 1262 1229 240.7
C 14 238 193961 668.86 1217 1225 288.2
C 2 16 179291 617.95 1217 1225 288.2
C 3 233 68267 232.66 1217 1225 288.2
D 7 80 3604527 12574.47 1210 1180 286.6
D 1 52 742248 2586.08 1210 1180 286.6
D 12 233 122248 422.49 1210 1180 286.6

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter