ASTROSAT CZTI

Data Quality Report

Orbit 20170527_C02_037T01_9000001252_level2

Creation date: 2025-11-13T21:06:31.863502
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/AS1C02_037T01_9000001252cztM0_level2.fits modeM0/AS1C02_037T01_9000001252cztM0_level2_quad_clean.evt
Size (bytes)847,293,120877,691,520
Size808.0 MB 837.0 MB
Events in quadrant A5,108,7665,326,092
Events in quadrant B4,926,6765,285,273
Events in quadrant C5,038,2105,079,364
Events in quadrant D4,287,1124,594,695

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018760
B018710
C018700
D018760

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02302570
B02063280
C01879290
D02397050

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01270
C01270
D01270

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9178920062.185447%
B9185221942.388625%
C918866040.657336%
D9186947755.197618%

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 104790 92050 0 0 0.00% 0.00%
B 104790 92050 0 0 0.00% 0.00%
C 104790 92084 0 0 0.00% 0.00%
D 104790 91435 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 4986 11.18 1329 1236 335.3
A 7 110 4288 9.1 1329 1236 335.3
A 0 30 3953 8.1 1329 1236 335.3
B 2 9 4256 11.53 1302 1233 262.2
B 3 17 3472 8.54 1302 1233 262.2
B 12 226 3279 7.8 1302 1233 262.2
C 12 241 3436 6.26 1332 1226 353.2
C 2 191 3334 5.97 1332 1226 353.2
C 3 158 3301 5.87 1332 1226 353.2
D 3 14 3151 6.27 1220 1107 326.2
D 6 231 3102 6.12 1220 1107 326.2
D 7 5 3040 5.93 1220 1107 326.2

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