ASTROSAT CZTI

Data Quality Report

Orbit 58923

Creation date: 2026-08-18T20:15:11.299415
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_004T07_9000006598_58923cztM0_level2.fits modeM0/AS1A14_004T07_9000006598_58923cztM0_level2_quad_clean.evt
Size (bytes)562,026,240113,322,240
Size536.0 MB 108.1 MB
Events in quadrant A5,017,281745,169
Events in quadrant B4,713,496788,172
Events in quadrant C4,529,038717,253
Events in quadrant D5,942,101641,525

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200173
B0194272
C0188922
D0229362

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580
B01580
C01580
D01580

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A77564375.634348%
B77564485.776173%
C77562873.700361%
D77567389.515214%

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 8741 7757 243 243 2.78% 3.13%
B 8741 7757 138 138 1.58% 1.78%
C 8741 7757 139 139 1.59% 1.79%
D 8741 7758 493 493 5.64% 6.35%

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 14 238 992988 4535.65 889 865 218.7
A 15 233 246872 1124.66 889 865 218.7
A 13 248 211219 961.67 889 865 218.7
B 4 171 438765 2346.38 871 836 186.6
B 10 247 194622 1038.28 871 836 186.6
B 4 236 138861 739.52 871 836 186.6
C 12 252 526144 2202.77 862 850 238.5
C 12 249 278163 1162.88 862 850 238.5
C 6 13 141117 588.2 862 850 238.5
D 12 110 1714883 7020.48 855 813 244.2
D 7 222 121380 493.82 855 813 244.2
D 11 129 117679 478.66 855 813 244.2

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

TCT plots

Parameter TCT0 TCT_healed
Tct