ASTROSAT CZTI

Data Quality Report

Orbit 20161107_A02_006T01_9000000776_level2

Creation date: 2025-11-07T14:32:42.986226
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/AS1A02_006T01_9000000776cztM0_level2.fits modeM0/AS1A02_006T01_9000000776cztM0_level2_quad_clean.evt
Size (bytes)622,422,720604,166,400
Size593.6 MB 576.2 MB
Events in quadrant A3,681,6073,528,144
Events in quadrant B3,625,0083,571,530
Events in quadrant C3,668,1743,366,667
Events in quadrant D3,187,7383,146,099

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01080
B01060
C01080
D01060

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013920
B014060
C013900
D013890

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01636290
B01509710
C01429700
D01435670

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6810512931.898539%
B6826915622.288008%
C6827611021.614037%
D684528721.273885%

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 80759 69688 0 0 0.00% 0.00%
B 80759 69717 0 0 0.00% 0.00%
C 80759 69660 0 0 0.00% 0.00%
D 80759 69806 0 0 0.00% 0.00%

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 29 3608 11.09 954 885 245.5
A 14 188 3533 10.78 954 885 245.5
A 14 204 3126 9.13 954 885 245.5
B 2 9 3079 11.22 954 904 193.8
B 14 254 2510 8.29 954 904 193.8
B 12 226 2478 8.12 954 904 193.8
C 1 80 2668 6.92 969 894 256.4
C 1 81 2611 6.7 969 894 256.4
C 12 241 2597 6.64 969 894 256.4
D 3 14 2392 6.48 907 823 242.2
D 1 19 2364 6.36 907 823 242.2
D 3 31 2297 6.09 907 823 242.2

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