ASTROSAT CZTI

Data Quality Report

Orbit 20151212_P01_997T01_9000000214_level2

Creation date: 2025-10-25T10:55:50.648633
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/AS1P01_997T01_9000000214cztM0_level2.fits modeM0/AS1P01_997T01_9000000214cztM0_level2_quad_clean.evt
Size (bytes)843,505,9201,352,689,920
Size804.4 MB 1.3 GB
Events in quadrant A4,899,0888,966,204
Events in quadrant B4,810,5088,943,870
Events in quadrant C4,682,4808,283,306
Events in quadrant D4,118,0967,746,498

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580
B01580
C01580
D01580

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04326630
B04515410
C04455340
D04112200

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020880
B020880
C020880
D020880

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1026282730.266009%
B1026293670.357599%
C10262911591.129310%
D10262811181.089371%

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 123598 102620 0 0 0.00% 0.00%
B 123599 102621 0 0 0.00% 0.00%
C 123599 102626 0 0 0.00% 0.00%
D 123598 102586 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 4449 11.31 1266 1184 288.7
A 7 110 4416 11.19 1266 1184 288.7
A 14 188 3692 8.69 1266 1184 288.7
B 2 9 3966 12.08 1272 1210 228.1
B 14 254 3311 9.21 1272 1210 228.1
B 5 128 3289 9.11 1272 1210 228.1
C 12 241 3376 7.41 1238 1141 301.7
C 2 191 3193 6.8 1238 1141 301.7
C 1 81 3042 6.3 1238 1141 301.7
D 1 19 3116 7.4 1176 1079 275.3
D 6 231 3054 7.18 1176 1079 275.3
D 6 44 2962 6.84 1176 1079 275.3

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