ASTROSAT CZTI

Data Quality Report

Orbit 20170109_A02_111T01_9000000954_level2

Creation date: 2025-11-09T02:31:49.535143
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/AS1A02_111T01_9000000954cztM0_level2.fits modeM0/AS1A02_111T01_9000000954cztM0_level2_quad_clean.evt
Size (bytes)270,060,480279,768,960
Size257.5 MB 266.8 MB
Events in quadrant A1,613,5281,678,063
Events in quadrant B1,537,0461,662,316
Events in quadrant C1,590,3641,593,135
Events in quadrant D1,357,5141,458,598

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0616960
B0678420
C0616560
D0705610

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210
B0210
C0210
D0210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06160
B06160
C06160
D06160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A302651940.641004%
B302656862.266645%
C302651110.366760%
D302653321.096977%

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 32289 30264 0 0 0.00% 0.00%
B 32289 30260 0 0 0.00% 0.00%
C 32289 30265 0 0 0.00% 0.00%
D 32289 30261 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 1612 11.37 418 390 107.5
A 0 29 1597 11.23 418 390 107.5
A 14 204 1433 9.7 418 390 107.5
B 2 9 1356 11.56 406 386 83.9
B 14 254 1093 8.43 406 386 83.9
B 12 226 1067 8.12 406 386 83.9
C 12 241 1171 6.98 420 388 112.2
C 2 191 1065 6.04 420 388 112.2
C 9 188 1060 5.99 420 388 112.2
D 6 231 1008 6.26 388 353 104.7
D 15 63 1005 6.23 388 353 104.7
D 11 82 1005 6.23 388 353 104.7

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