ASTROSAT CZTI

Data Quality Report

Orbit 20210326_A10_007T01_9000004276_level2

Creation date: 2021-03-31T13:07:15.887596
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

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/AS1A10_007T01_9000004276cztM0_level2_bc.evt modeM0/AS1A10_007T01_9000004276cztM0_level2_quad_clean.evt
Size (bytes)14,945,705,2803,608,645,760
Size13.9 GB 3.4 GB
Events in quadrant A58,174,04223,201,507
Events in quadrant B140,309,13623,351,395
Events in quadrant C85,995,10222,640,093
Events in quadrant D149,991,77421,755,916

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A054600
B054580
C054580
D054580

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05649130
B08376770
C06799820
D08633110

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04460
B04460
C04460
D04460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A26801130071.121969%
B26798776562.856855%
C268037118124.406854%
D268038177746.631149%

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 329209 268079 5 5 0.00% 0.00%
B 329223 268023 75 75 0.02% 0.03%
C 329215 268104 148 148 0.04% 0.06%
D 329176 268095 5417 5417 1.65% 2.02%

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 12 16 662942 207.1 14793 14568 3130.7
A 13 254 497535 154.27 14793 14568 3130.7
A 12 194 189534 55.89 14793 14568 3130.7
B 6 159 76040061 27145.75 14908 14553 2800.6
B 0 229 3765587 1339.35 14908 14553 2800.6
B 10 245 1047907 368.97 14908 14553 2800.6
C 3 233 24758834 7355.99 14308 14281 3363.9
C 10 22 4145994 1228.26 14308 14281 3363.9
C 7 247 1061185 311.22 14308 14281 3363.9
D 8 195 53903067 16822.0 14258 13837 3203.5
D 7 80 23976717 7480.22 14258 13837 3203.5
D 7 223 5682003 1769.37 14258 13837 3203.5

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