ASTROSAT CZTI

Data Quality Report

Orbit 04918

Creation date: 2024-06-27T14:48:48.581017
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/AS1G05_118T01_9000000622_04918cztM0_level2.evt modeM0/AS1G05_118T01_9000000622_04918cztM0_level2_quad_clean.evt
Size (bytes)1,829,275,200265,714,560
Size1.7 GB 253.4 MB
Events in quadrant A9,960,4391,659,923
Events in quadrant B10,816,7681,667,610
Events in quadrant C14,587,8991,632,358
Events in quadrant D18,534,4811,556,536

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0454376
B0472886
C0591614
D07035922

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0270
B0260
C0260
D0270

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04520
B04520
C04520
D04520

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A222351280.575669%
B222351370.616146%
C2223615216.840259%
D22233262011.784285%

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 24250 22237 23 23 0.09% 0.10%
B 24250 22236 23 23 0.09% 0.10%
C 24250 22236 1297 1297 5.35% 5.83%
D 24250 22235 1980 1980 8.16% 8.90%

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 15 174 173519 342.31 2472 2413 499.9
A 13 251 113250 221.74 2472 2413 499.9
A 0 31 68287 131.79 2472 2413 499.9
B 7 221 381445 799.76 2499 2439 473.9
B 15 204 217778 454.4 2499 2439 473.9
B 4 48 181503 377.85 2499 2439 473.9
C 9 247 5236083 9622.67 2362 2375 543.9
C 1 16 52365 91.91 2362 2375 543.9
C 12 4 34934 59.86 2362 2375 543.9
D 2 63 6015246 10626.78 2332 2260 565.8
D 2 33 1304159 2300.85 2332 2260 565.8
D 2 136 684818 1206.29 2332 2260 565.8

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