ASTROSAT CZTI

Data Quality Report

Orbit 20220115_C07_001T04_9000004868_level2

Creation date: 2025-12-31T09:47:49.160417
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/AS1C07_001T04_9000004868cztM0_level2.fits modeM0/AS1C07_001T04_9000004868cztM0_level2_quad_clean.evt
Size (bytes)769,861,440931,078,080
Size734.2 MB 887.9 MB
Events in quadrant A4,751,1666,012,188
Events in quadrant B4,275,0025,416,143
Events in quadrant C4,619,3205,839,273
Events in quadrant D3,933,5585,206,134

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03180
B03170
C03190
D03150

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017290
B017220
C017220
D017120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02111510
B03146700
C02007830
D02612470

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8344940174.813719%
B836411569018.758743%
C8338614791.773679%
D8337839864.780638%

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 116806 83490 0 0 0.00% 0.00%
B 116806 83601 0 0 0.00% 0.00%
C 116806 83393 0 0 0.00% 0.00%
D 116806 83358 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 9 19 3876 8.91 1237 1169 303.6
A 7 110 3795 8.65 1237 1169 303.6
A 0 29 3788 8.63 1237 1169 303.6
B 2 9 3758 12.16 1133 1086 219.8
B 3 80 3270 9.94 1133 1086 219.8
B 2 8 2973 8.59 1133 1086 219.8
C 1 81 3937 8.99 1223 1149 310.0
C 1 80 3880 8.81 1223 1149 310.0
C 1 65 3187 6.57 1223 1149 310.0
D 4 160 2959 6.45 1127 1030 298.9
D 7 3 2941 6.39 1127 1030 298.9
D 10 189 2878 6.18 1127 1030 298.9

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