ASTROSAT CZTI

Data Quality Report

Orbit 20160109_G02_020T01_9000000260_level2

Creation date: 2025-10-25T19:24:04.164387
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/AS1G02_020T01_9000000260cztM0_level2.fits modeM0/AS1G02_020T01_9000000260cztM0_level2_quad_clean.evt
Size (bytes)789,413,760952,200,000
Size752.8 MB 908.1 MB
Events in quadrant A4,528,3445,859,312
Events in quadrant B4,546,6985,965,662
Events in quadrant C4,529,6885,618,334
Events in quadrant D3,776,1844,873,491

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019380
B019400
C019380
D019400

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04185180
B04172180
C03970380
D04377770

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01270
B01240
C01270
D01260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9512418051.897523%
B951293530.371075%
C951375720.601238%
D9514565526.886331%

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 127352 95197 0 0 0.00% 0.00%
B 127352 95225 0 0 0.00% 0.00%
C 127352 95227 0 0 0.00% 0.00%
D 127352 94779 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 4147 11.16 1172 1094 273.6
A 7 110 3961 10.48 1172 1094 273.6
A 9 19 3295 8.04 1172 1094 273.6
B 2 9 3542 11.01 1202 1141 218.1
B 5 128 3007 8.55 1202 1141 218.1
B 14 254 2952 8.3 1202 1141 218.1
C 12 241 3034 6.67 1195 1105 289.1
C 9 242 2979 6.48 1195 1105 289.1
C 1 81 2930 6.31 1195 1105 289.1
D 6 44 2736 6.91 1078 988 253.1
D 10 189 2724 6.86 1078 988 253.1
D 6 231 2664 6.62 1078 988 253.1

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