ASTROSAT CZTI

Data Quality Report

Orbit 52887

Creation date: 2025-07-16T12:36:06.685422
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/AS1C09_011T08_9000006482_52887cztM0_level2.fits modeM0/AS1C09_011T08_9000006482_52887cztM0_level2_quad_clean.evt
Size (bytes)625,763,52081,676,800
Size596.8 MB 77.9 MB
Events in quadrant A9,019,762444,077
Events in quadrant B4,004,409604,312
Events in quadrant C4,642,458519,316
Events in quadrant D5,040,579493,138

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0309061
B0159821
C0179081
D0190621

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01200
B01200
C01200
D01200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5896166528.239484%
B58971612.730202%
C58974247.190097%
D58975669.598101%

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 6931 5896 1570 1570 22.65% 26.63%
B 6932 5897 82 82 1.18% 1.39%
C 6932 5898 411 411 5.93% 6.97%
D 6932 5898 562 562 8.11% 9.53%

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 9 191 5129817 35036.35 580 566 146.4
A 12 17 359242 2450.01 580 566 146.4
A 15 174 314219 2142.47 580 566 146.4
B 8 3 741453 5704.03 612 594 129.9
B 1 255 302569 2324.97 612 594 129.9
B 7 0 179727 1379.18 612 594 129.9
C 7 80 1548995 9644.17 583 578 160.6
C 2 12 151204 938.16 583 578 160.6
C 14 254 144165 894.32 583 578 160.6
D 8 176 838228 4929.12 592 565 169.9
D 11 176 641167 3769.54 592 565 169.9
D 3 224 442480 2600.39 592 565 169.9

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