ASTROSAT CZTI

Data Quality Report

Orbit 20180314_G08_023T01_9000001978_level2

Creation date: 2025-11-20T02:54:07.748220
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_023T01_9000001978cztM0_level2.fits modeM0/AS1G08_023T01_9000001978cztM0_level2_quad_clean.evt
Size (bytes)773,769,600807,111,360
Size737.9 MB 769.7 MB
Events in quadrant A4,687,2404,927,493
Events in quadrant B4,584,2864,990,253
Events in quadrant C4,619,9944,694,337
Events in quadrant D3,965,0784,256,703

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01768800
B01766790
C01694110
D01933070

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016580
B016580
C016580
D016580

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8132714841.824732%
B8132715601.918182%
C813278391.031638%
D8132725363.118276%

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 94017 81309 0 0 0.00% 0.00%
B 94017 81318 0 0 0.00% 0.00%
C 94017 81327 0 0 0.00% 0.00%
D 94017 81318 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 4528 11.13 1217 1141 304.2
A 7 110 3791 8.71 1217 1141 304.2
A 9 19 3411 7.46 1217 1141 304.2
B 2 9 3983 12.19 1207 1151 232.3
B 2 8 3064 8.24 1207 1151 232.3
B 5 128 3064 8.24 1207 1151 232.3
C 12 241 3281 6.83 1221 1136 314.2
C 2 191 3006 5.95 1221 1136 314.2
C 3 126 3004 5.94 1221 1136 314.2
D 6 231 2925 6.22 1131 1028 305.2
D 3 14 2849 5.97 1131 1028 305.2
D 6 67 2791 5.78 1131 1028 305.2

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