ASTROSAT CZTI

Data Quality Report

Orbit 57177

Creation date: 2026-04-23T08:37:56.293967
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/AS1A14_070T08_9000006568_57177cztM0_level2.fits modeM0/AS1A14_070T08_9000006568_57177cztM0_level2_quad_clean.evt
Size (bytes)486,907,20092,350,080
Size464.4 MB 88.1 MB
Events in quadrant A3,321,867606,384
Events in quadrant B4,107,562641,744
Events in quadrant C5,720,989539,141
Events in quadrant D4,320,173512,450

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210
B0210
C0210
D0210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0152062
B0174602
C0219812
D0177232

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7115721.011947%
B71154075.720309%
C71156729.444835%
D71152062.895292%

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 9597 7400 18 18 0.19% 0.24%
B 9597 7399 259 259 2.70% 3.50%
C 9597 7399 528 528 5.50% 7.14%
D 9597 7392 141 141 1.47% 1.91%

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 3 14 204707 1081.43 760 740 188.6
A 13 248 118020 621.81 760 740 188.6
A 10 251 15609 78.83 760 740 188.6
B 10 16 1018900 6474.57 737 709 157.3
B 10 247 48109 301.41 737 709 157.3
B 2 249 43569 272.54 737 709 157.3
C 15 224 2683094 13863.12 709 703 193.5
C 14 254 82842 424.51 709 703 193.5
C 14 67 63121 322.59 709 703 193.5
D 2 249 567362 2737.35 727 694 207.0
D 5 113 300896 1450.16 727 694 207.0
D 12 33 201283 968.97 727 694 207.0

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