ASTROSAT CZTI

Data Quality Report

Orbit 20180809_G08_039T01_9000002292_level2

Creation date: 2025-11-24T00:17:05.204938
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/AS1G08_039T01_9000002292cztM0_level2.fits modeM0/AS1G08_039T01_9000002292cztM0_level2_quad_clean.evt
Size (bytes)224,887,680217,313,280
Size214.5 MB 207.2 MB
Events in quadrant A1,350,3141,265,677
Events in quadrant B1,300,6301,286,358
Events in quadrant C1,329,1161,229,673
Events in quadrant D1,155,9061,124,116

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0556040
B0533630
C0526980
D0565040

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0260
B0260
C0260
D0260

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04960
B04960
C04960
D04960

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A243385172.124250%
B243382961.216205%
C243381600.657408%
D243383771.549018%

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 26933 24337 0 0 0.00% 0.00%
B 26933 24338 0 0 0.00% 0.00%
C 26933 24338 0 0 0.00% 0.00%
D 26933 24335 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 1286 10.71 351 329 89.4
A 7 110 1102 8.65 351 329 89.4
A 15 236 1034 7.89 351 329 89.4
B 2 9 1106 11.23 344 327 69.4
B 2 8 888 8.08 344 327 69.4
B 14 254 861 7.7 344 327 69.4
C 1 80 1028 7.51 351 325 93.7
C 1 81 1020 7.42 351 325 93.7
C 12 241 958 6.76 351 325 93.7
D 6 231 873 6.4 330 300 89.5
D 3 14 812 5.72 330 300 89.5
D 7 3 803 5.62 330 300 89.5

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