ASTROSAT CZTI

Data Quality Report

Orbit 53875

Creation date: 2025-09-13T16:44:15.442796
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_057T04_9000006508_53875cztM0_level2.fits modeM0/AS1A14_057T04_9000006508_53875cztM0_level2_quad_clean.evt
Size (bytes)652,000,32084,219,840
Size621.8 MB 80.3 MB
Events in quadrant A3,382,307601,472
Events in quadrant B3,943,089639,407
Events in quadrant C7,074,383487,937
Events in quadrant D9,258,170390,946

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0145325
B0158411
C0252871
D0317451

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A61551382.242080%
B61561442.339181%
C6156116218.875893%
D6156198232.196231%

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 7270 6156 164 164 2.26% 2.66%
B 7271 6157 72 72 0.99% 1.17%
C 7271 6157 913 913 12.56% 14.83%
D 7271 6156 1804 1804 24.81% 29.30%

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 12 115 465556 2825.78 662 646 164.5
A 15 174 166492 1008.03 662 646 164.5
A 3 62 36025 215.03 662 646 164.5
B 5 250 275211 1953.22 661 639 140.6
B 4 81 242993 1724.03 661 639 140.6
B 0 213 192420 1364.27 661 639 140.6
C 15 224 3502535 21164.93 598 593 165.5
C 12 2 349312 2107.58 598 593 165.5
C 2 12 275956 1664.23 598 593 165.5
D 8 176 5842307 37446.45 536 511 156.0
D 2 172 657796 4213.26 536 511 156.0
D 13 153 248307 1588.4 536 511 156.0

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