ASTROSAT CZTI

Data Quality Report

Orbit 20171108_A04_054T02_9000001674_level2

Creation date: 2025-11-18T06:35:37.909013
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/AS1A04_054T02_9000001674cztM0_level2.fits modeM0/AS1A04_054T02_9000001674cztM0_level2_quad_clean.evt
Size (bytes)80,717,76059,630,400
Size77.0 MB 56.9 MB
Events in quadrant A491,676326,076
Events in quadrant B470,106314,028
Events in quadrant C481,090298,229
Events in quadrant D418,180282,836

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0190
D0190

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0178740
B0212520
C0174870
D0191500

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01720
B01720
C01720
D01720

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A84021221.452035%
B84023964.713164%
C8402570.678410%
D84021371.630564%

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 10307 8402 0 0 0.00% 0.00%
B 10307 8402 0 0 0.00% 0.00%
C 10307 8402 0 0 0.00% 0.00%
D 10307 8398 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 29 468 10.21 127 120 34.1
A 7 110 407 8.42 127 120 34.1
A 14 79 371 7.36 127 120 34.1
B 2 9 407 10.27 124 117 28.2
B 5 128 326 7.4 124 117 28.2
B 14 254 324 7.33 124 117 28.2
C 1 81 345 6.51 127 118 34.8
C 2 191 332 6.14 127 118 34.8
C 12 241 324 5.91 127 118 34.8
D 3 14 333 6.7 119 108 33.6
D 1 19 314 6.13 119 108 33.6
D 7 5 312 6.07 119 108 33.6

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