ASTROSAT CZTI

Data Quality Report

Orbit 20220228_A09_038T41_9000004978_level2

Creation date: 2022-03-16T11:23:53.515524
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_038T41_9000004978cztM0_level2_bc.evt modeM0/AS1A09_038T41_9000004978cztM0_level2_quad_clean.evt
Size (bytes)444,936,960161,095,680
Size424.3 MB 153.6 MB
Events in quadrant A3,217,5931,090,934
Events in quadrant B2,536,8911,102,783
Events in quadrant C2,199,8991,116,250
Events in quadrant D4,991,5441,034,357

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01540
B01540
C01540
D01540

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0420
B0420
C0420
D0420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0212430
B0185030
C0164830
D0264190

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7701400.519413%
B77011942.519153%
C7701400.519413%
D77012873.726789%

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 9824 7701 0 0 0.00% 0.00%
B 9824 7700 20 20 0.20% 0.26%
C 9824 7700 4 4 0.04% 0.05%
D 9824 7700 82 82 0.83% 1.06%

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 15 169 1373850 14096.94 440 436 97.4
A 10 83 54621 556.16 440 436 97.4
A 13 6 31189 315.65 440 436 97.4
B 0 182 343003 3960.33 440 434 86.5
B 5 172 261841 3022.04 440 434 86.5
B 0 155 52201 598.46 440 434 86.5
C 15 214 320002 3150.58 437 437 101.4
C 0 10 95373 935.97 437 437 101.4
C 14 67 36655 357.07 437 437 101.4
D 8 195 1883835 17422.94 428 421 108.1
D 12 227 391197 3614.96 428 421 108.1
D 10 199 197707 1825.04 428 421 108.1

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