ASTROSAT CZTI

Data Quality Report

Orbit 20151216_P01_997T02_9000000218_level2

Creation date: 2025-10-25T12:36:56.234159
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/AS1P01_997T02_9000000218cztM0_level2.fits modeM0/AS1P01_997T02_9000000218cztM0_level2_quad_clean.evt
Size (bytes)531,221,760770,463,360
Size506.6 MB 734.8 MB
Events in quadrant A3,158,4365,425,860
Events in quadrant B3,081,5145,339,860
Events in quadrant C3,058,7105,084,497
Events in quadrant D2,181,8722,891,654

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0770
B0770
C0770
D0770

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02864530
B03084480
C02872250
D04882650

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013600
B013600
C013600
D013600

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A669864460.665811%
B6698414682.191568%
C669872730.407542%
D669812664339.776952%

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 82330 66971 0 0 0.00% 0.00%
B 82330 66944 0 0 0.00% 0.00%
C 82330 66978 0 0 0.00% 0.00%
D 82330 66778 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 3023 11.98 818 764 188.5
A 7 110 2889 11.27 818 764 188.5
A 14 188 2364 8.49 818 764 188.5
B 2 9 2435 11.37 814 776 145.9
B 14 254 2095 9.04 814 776 145.9
B 5 128 2062 8.81 814 776 145.9
C 12 241 2179 7.28 808 747 196.6
C 2 191 2048 6.62 808 747 196.6
C 9 242 1960 6.17 808 747 196.6
D 1 19 1577 6.78 622 571 148.4
D 11 82 1569 6.73 622 571 148.4
D 6 231 1545 6.57 622 571 148.4

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