ASTROSAT CZTI

Data Quality Report

Orbit 20160915_C01_015T01_9000000668_level2

Creation date: 2025-11-06T13:29:39.740646
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/AS1C01_015T01_9000000668cztM0_level2.fits modeM0/AS1C01_015T01_9000000668cztM0_level2_quad_clean.evt
Size (bytes)852,223,680799,577,280
Size812.7 MB 762.5 MB
Events in quadrant A5,205,4704,772,880
Events in quadrant B5,047,8464,767,192
Events in quadrant C5,094,8524,527,563
Events in quadrant D3,962,9483,656,393

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019300
B019300
C019300
D019300

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01430
B01430
C01430
D01430

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01940830
B01949310
C01952030
D03448480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9468511631.228283%
B9468312221.290622%
C946859070.957913%
D946831724018.208126%

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 109064 94687 0 0 0.00% 0.00%
B 109064 94687 0 0 0.00% 0.00%
C 109064 94688 0 0 0.00% 0.00%
D 109064 93990 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 14 188 5084 10.99 1348 1250 348.9
A 0 29 5014 10.79 1348 1250 348.9
A 14 204 4486 9.27 1348 1250 348.9
B 2 9 4382 11.46 1327 1253 273.1
B 12 226 3483 8.17 1327 1253 273.1
B 14 254 3427 7.96 1327 1253 273.1
C 1 80 3573 6.49 1346 1238 359.6
C 1 81 3508 6.31 1346 1238 359.6
C 2 191 3357 5.89 1346 1238 359.6
D 3 14 3173 7.16 1127 1020 300.8
D 1 19 2946 6.4 1127 1020 300.8
D 1 3 2930 6.35 1127 1020 300.8

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