ASTROSAT CZTI

Data Quality Report

Orbit 20180825_T02_066T01_9000002324_level2

Creation date: 2025-11-24T05:27:33.478947
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/AS1T02_066T01_9000002324cztM0_level2.fits modeM0/AS1T02_066T01_9000002324cztM0_level2_quad_clean.evt
Size (bytes)168,232,320155,252,160
Size160.4 MB 148.1 MB
Events in quadrant A1,006,498913,363
Events in quadrant B980,322926,700
Events in quadrant C994,646858,770
Events in quadrant D839,222728,760

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0401230
B0392580
C0441880
D0542000

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03740
B03740
C03740
D03740

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A184836243.376075%
B184834222.283179%
C184836243.376075%
D1848316238.781042%

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 19648 18483 0 0 0.00% 0.00%
B 19648 18483 0 0 0.00% 0.00%
C 19648 18484 0 0 0.00% 0.00%
D 19648 18473 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 29 976 10.84 261 244 67.5
A 7 110 835 8.76 261 244 67.5
A 15 236 755 7.57 261 244 67.5
B 2 9 841 11.0 258 245 54.2
B 2 8 703 8.45 258 245 54.2
B 5 225 669 7.82 258 245 54.2
C 1 80 766 7.49 262 243 69.8
C 1 81 723 6.87 262 243 69.8
C 3 126 672 6.14 262 243 69.8
D 1 19 623 6.25 238 216 65.1
D 3 14 620 6.2 238 216 65.1
D 6 231 596 5.83 238 216 65.1

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