ASTROSAT CZTI

Data Quality Report

Orbit 35201

Creation date: 2022-04-02T14:48:46.719496
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/AS1T05_020T01_9000005050_35201cztM0_level2.evt modeM0/AS1T05_020T01_9000005050_35201cztM0_level2_quad_clean.evt
Size (bytes)2,524,766,400263,036,160
Size2.4 GB 250.9 MB
Events in quadrant A11,255,0201,665,645
Events in quadrant B29,156,9191,477,612
Events in quadrant C13,144,9641,650,422
Events in quadrant D21,320,4191,546,339

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04800
B04800
C04800
D04800

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0485245
B01028165
C0528735
D0798665

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0730
B0730
C0730
D0730

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A23620390.165114%
B23620602125.491109%
C236202691.138865%
D2362013335.643522%

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 30815 23625 8 8 0.03% 0.03%
B 30815 23625 4156 4156 13.49% 17.59%
C 30815 23625 185 185 0.60% 0.78%
D 30815 23625 1069 1069 3.47% 4.52%

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 10 83 323670 579.26 2773 2719 554.1
A 15 169 73609 127.94 2773 2719 554.1
A 9 143 63250 109.25 2773 2719 554.1
B 5 236 18754657 39400.12 2483 2412 475.9
B 3 112 330129 688.56 2483 2412 475.9
B 0 190 97971 200.78 2483 2412 475.9
C 15 214 976888 1573.66 2694 2718 619.0
C 0 10 797768 1284.31 2694 2718 619.0
C 1 23 465394 747.4 2694 2718 619.0
D 8 195 7554985 11708.33 2665 2592 645.0
D 2 250 1174805 1817.26 2665 2592 645.0
D 12 233 715247 1104.81 2665 2592 645.0

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