ASTROSAT CZTI

Data Quality Report

Orbit 01555

Creation date: 2024-06-27T14:12:24.151287
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_019T04_9000000262_01555cztM0_level2.evt modeM0/AS1G02_019T04_9000000262_01555cztM0_level2_quad_clean.evt
Size (bytes)559,342,08052,632,000
Size533.4 MB 50.2 MB
Events in quadrant A4,134,061340,979
Events in quadrant B4,312,848350,219
Events in quadrant C3,970,741342,515
Events in quadrant D4,302,753326,638

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D040

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0680
B0680
C0680
D0680

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0146322
B0151331
C0141251
D0151291

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A3283511.553457%
B3283381.157478%
C3283220.670119%
D32831243.777033%

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 3658 3283 194 194 5.30% 5.91%
B 3658 3283 223 223 6.10% 6.79%
C 3658 3283 171 171 4.67% 5.21%
D 3658 3284 426 426 11.65% 12.97%

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 12 251 12406 43.21 1075 1082 262.0
A 10 2 6404 20.31 1075 1082 262.0
A 13 9 4626 13.52 1075 1082 262.0
B 4 216 7890 24.88 1135 1141 271.2
B 4 170 4528 12.49 1135 1141 271.2
B 0 182 3413 8.38 1135 1141 271.2
C 8 208 25150 84.48 1009 1044 285.4
C 7 159 4518 12.17 1009 1044 285.4
C 14 223 4399 11.76 1009 1044 285.4
D 13 105 525058 1722.83 966 1002 304.2
D 10 84 143265 467.69 966 1002 304.2
D 13 169 13846 42.22 966 1002 304.2

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