ASTROSAT CZTI

Data Quality Report

Orbit 20160126_G02_020T02_9000000294_level2

Creation date: 2025-10-26T00:42:51.883935
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/AS1G02_020T02_9000000294cztM0_level2.fits modeM0/AS1G02_020T02_9000000294cztM0_level2_quad_clean.evt
Size (bytes)140,132,160150,298,560
Size133.6 MB 143.3 MB
Events in quadrant A806,540884,152
Events in quadrant B803,882905,708
Events in quadrant C802,572852,220
Events in quadrant D696,194774,453

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A1139965633804328139964394242094
B1139965633804328139964394242094
C1139965633804328139964394242094
D1139965633804328139964394242094

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0711460
B0705560
C0686040
D0678960

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03320
B03320
C03320
D03320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1644660.036483%
B16442120.072984%
C16444230.139869%
D16446370.224979%

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 19636 16446 0 0 0.00% 0.00%
B 19636 16444 0 0 0.00% 0.00%
C 19636 16445 0 0 0.00% 0.00%
D 19636 16446 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 14 188 735 10.8 208 196 49.9
A 0 29 722 10.54 208 196 49.9
A 7 110 639 8.87 208 196 49.9
B 2 9 656 11.3 212 202 40.2
B 14 254 528 8.11 212 202 40.2
B 10 225 500 7.41 212 202 40.2
C 2 191 550 6.62 211 196 53.5
C 1 81 548 6.58 211 196 53.5
C 12 241 548 6.58 211 196 53.5
D 6 44 515 6.81 198 182 48.9
D 11 82 498 6.47 198 182 48.9
D 6 231 492 6.34 198 182 48.9

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