ASTROSAT CZTI

Data Quality Report

Orbit 20161202_C02_017T01_9000000848_level2

Creation date: 2025-11-08T02:30:45.057563
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/AS1C02_017T01_9000000848cztM0_level2.fits modeM0/AS1C02_017T01_9000000848cztM0_level2_quad_clean.evt
Size (bytes)407,730,240529,629,120
Size388.8 MB 505.1 MB
Events in quadrant A2,386,5083,270,212
Events in quadrant B2,384,8643,421,127
Events in quadrant C2,450,5343,304,439
Events in quadrant D2,107,0563,027,225

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08960
B08960
C08960
D08960

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01084060
B0954050
C0894980
D0997900

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0750
B0750
C0750
D0750

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4395725925.896672%
B439576861.560616%
C439573100.705235%
D439576291.430944%

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 51592 43887 0 0 0.00% 0.00%
B 51592 43956 0 0 0.00% 0.00%
C 51592 43957 0 0 0.00% 0.00%
D 51592 43954 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 2371 11.51 622 585 155.2
A 7 110 1985 9.02 622 585 155.2
A 0 30 1846 8.13 622 585 155.2
B 2 9 2125 12.16 630 603 125.1
B 14 254 1690 8.69 630 603 125.1
B 5 128 1643 8.31 630 603 125.1
C 1 81 1833 7.22 647 602 170.5
C 1 80 1751 6.74 647 602 170.5
C 12 241 1687 6.36 647 602 170.5
D 3 14 1605 6.71 600 548 157.6
D 6 231 1600 6.68 600 548 157.6
D 11 82 1571 6.49 600 548 157.6

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